Sample records for numerical study developing

  1. An Integrated Experimental and Numerical Study: Developing a...

    Open Energy Info (EERE)

    and natural geothermal systems. The simulator can also be used to evaluate long-term CO2 sequestration potentials. State Minnesota Objectives Modify a numerical simulator (TOUGH2)...

  2. Seismic Earth Pressure Development in Sheet Pile Retaining Walls: A Numerical Study

    E-Print Network [OSTI]

    Rajeev, P; Sivakugan, N

    2015-01-01T23:59:59.000Z

    The design of retaining walls requires the complete knowledge of the earth pressure distribution behind the wall. Due to the complex soil-structure effect, the estimation of earth pressure is not an easy task; even in the static case. The problem becomes even more complex for the dynamic (i.e., seismic) analysis and design of retaining walls. Several earth pressure models have been developed over the years to integrate the dynamic earth pressure with the static earth pressure and to improve the design of retaining wall in seismic regions. Among all the models, MononobeOkabe (M-O) method is commonly used to estimate the magnitude of seismic earth pressures in retaining walls and is adopted in design practices around the world (e.g., EuroCode and Australian Standards). However, the M-O method has several drawbacks and does not provide reliable estimate of the earth pressure in many instances. This study investigates the accuracy of the M-O method to predict the dynamic earth pressure in sheet pile wall. A 2D pl...

  3. NREL Developing a Numerical Simulation Tool to Study Hydrokinetic Energy Conversion Devices and Arrays (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-02-01T23:59:59.000Z

    New code will help accelerate design improvements by providing a high-fidelity simulation tool to study power performance, structural loading, and the interactions between devices in arrays.

  4. Studied models Numerical scheme

    E-Print Network [OSTI]

    Helluy, Philippe

    : Sound speed: c0 = 1500m/s Pressure: p0 = 105Pa Density: 0 = 1000kg/m3 Vapor: 1 = 1.4 (1 = 0) Water: 2. Helluy, S. M¨uller H´el`ene Mathis Micro-Macro Modelling and Simulation of Liquid-Vapour Flows #12 approximations H´el`ene Mathis Micro-Macro Modelling and Simulation of Liquid-Vapour Flows #12;Studied models

  5. Developments in Petroleum Science, 6 FUNDAMENTALS OF NUMERICAL

    E-Print Network [OSTI]

    Santos, Juan

    Developments in Petroleum Science, 6 FUNDAMENTALS OF NUMERICAL RESERVOIR SIMULATION DONALD WCongressCatalogingin PublicationData Peaceman, Donald W Fundamentals of numerical reservoir simulation. (develrpents in petroleum

  6. Numerical Study of a Turbulent Hydraulic Jump

    E-Print Network [OSTI]

    Zhao, Qun

    Numerical Study of a Turbulent Hydraulic Jump Qun Zhao, Shubhra Misra, Ib. A. Svendsen and James T of a Turbulent Hydraulic Jump p.1/14 #12;Objective Our ultimate goal is to study the breaking waves. Numerical Study of a Turbulent Hydraulic Jump p.2/14 #12;A moving bore Qiantang Bore China (Courtesy of Dr J

  7. Characterization of Lung's Emphysema Distribution: Numerical Assessment of Disease Development

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Characterization of Lung's Emphysema Distribution: Numerical Assessment of Disease Development M, Egypt. Abstract--Chronic Obstructive Pulmonary Disease (COPD) refers to a group of lung diseases bronchitis. Pulmonary emphysema is defined as a lung disease characterized by "abnormal enlargement

  8. Numerical Relativity as a tool for studying the Early Universe

    E-Print Network [OSTI]

    David Garrison

    2014-03-12T23:59:59.000Z

    Numerical simulations are becoming a more effective tool for conducting detailed investigations into the evolution of our universe. In this article, we show how the framework of numerical relativity can be used for studying cosmological models. The author is working to develop a large-scale simulation of the dynamical processes in the early universe. These take into account interactions of dark matter, scalar perturbations, gravitational waves, magnetic fields and a turbulent plasma. The code described in this report is a GRMHD code based on the Cactus framework and is structured to utilize one of several different differencing methods chosen at run-time. It is being developed and tested on the University of Houston's Maxwell cluster.

  9. Numerical study on optimal Stirling engine regenerator matrix designs taking into account the effects of matrix

    E-Print Network [OSTI]

    Numerical study on optimal Stirling engine regenerator matrix designs taking into account matrix design that improves the efficiency of a Stirling engine has been developed in a numerical study of the existing SM5 Stirling engine. A new, detailed, one-dimensional Stirling engine model that delivers results

  10. Numerical studies of a simple Coulomb blockade model

    E-Print Network [OSTI]

    Shao, Jianfeng

    1991-01-01T23:59:59.000Z

    NUMERICAL STUDIES OF A SIMPLE COULOMB BLOCKADE MODEL A Thesis by JIANFENG SHAO Submitted to the Office of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1991... Major Subject: Physics NUMERICAL STUDIES OF A SIMPLE COULOMB BLOCKADE MODEL A Thesis by JIANFENG SHAO Approved as to style and content by: Roland E, Allen (Chair of Committee) /, 1 r oseph H. R s ( Member) Chin B. Su (Member) Richard L...

  11. Prediction of Thermoacoustic Instabilities: Numerical Study of Mach number Effects.

    E-Print Network [OSTI]

    Nicoud, Franck

    Prediction of Thermoacoustic Instabilities: Numerical Study of Mach number Effects. K. Wieczorek equations. I. Introduction In the calculation of thermoacoustic instabilities, an assumption lead to significant changes in the evaluation of the thermo-acoustic modes present in the combustion

  12. Numerical

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire3627 Federal RegisterImplementation andNumerical simulations

  13. EXPERIMENTAL AND NUMERICAL STUDY OF TRANSIENT ELECTRONIC CHIP COOLING BY

    E-Print Network [OSTI]

    component to ensure reliable and stable performance and prevent any failure or malfunction [2, 3]. The heatEXPERIMENTAL AND NUMERICAL STUDY OF TRANSIENT ELECTRONIC CHIP COOLING BY LIQUID FLOW State University, Columbus, Ohio, USA Cooling of electronic chips has become a critical aspect

  14. Inertia ratchets: A numerical study versus theory B. Lindner,1

    E-Print Network [OSTI]

    Lindner, Benjamin

    Inertia ratchets: A numerical study versus theory B. Lindner,1 L. Schimansky-Geier,1 P. Reimann,2 P in a periodic but asymmetric potential ratchet is investigated. Our special focus is on the influence of inertia cur- rent in periodic structures that lack reflection symmetry ratchets , e.g. see the reviews 1

  15. Numerical studies on the geomechanical stability ofhydrate-bearing sediments

    SciTech Connect (OSTI)

    Rutqvist, Jonny; Moridis, George J.

    2007-05-01T23:59:59.000Z

    The thermal and mechanical loading of oceanicHydrate-Bearing Sediments (HBS) can result in hydrate dissociation and asignificant pressure increase, with potentially adverse consequences onthe integrity and stability of the wellbore assembly, the HBS, and thebounding formations. The perception of HBS instability, coupled withinsufficient knowledge of their geomechanical behavior and the absence ofpredictive capabilities, have resulted in a strategy of avoidance of HBSwhen locating offshore production platforms, and can impede thedevelopment of hydrate deposits as gas resources.In this study weinvestigate in three cases of coupled hydraulic, thermodynamic andgeomechanical behavior of oceanic hydrate-bearing sediments. The firstinvolves hydrate heating as warm fluids from deeper conventionalreservoirs ascend to the ocean floor through uninsulated pipesintersecting the HBS. The second case describes system response duringgas production from a hydrate deposit, and the third involves mechanicalloading caused by the weight of structures placed on the ocean flooroverlying hydrate-bearing sediments.For the analysis of the geomechanicalstability of HBS, we developed and used a numerical model that integratesa commercial geomechanical code and a simulator describing the coupledprocesses of fluid flow, heat transport and thermodynamic behavior in theHBS. Our simulation results indicate that the stability of HBS in thevicinity of warm pipes may be significantly affected, especially if thesediments are unconsolidated and more compressible. Gas production fromoceanic deposits may also affect the geomechanical stability of HBS underthe conditions that are deemed desirablefor production. Conversely, theincreased pressure caused by the weight of structures on the ocean floorincreases the stability of underlying hydrates.

  16. Comparative study of variational chaos indicators and ODEs' numerical integrators

    E-Print Network [OSTI]

    Luciano A. Darriba; Nicols P. Maffione; Pablo M. Cincotta; Claudia M. Giordano

    2012-05-08T23:59:59.000Z

    The reader can find in the literature a lot of different techniques to study the dynamics of a given system and also, many suitable numerical integrators to compute them. Notwithstanding the recent work of Maffione et al. (2011a) for mappings, a detailed comparison among the widespread indicators of chaos in a general system is still lacking. Such a comparison could lead to select the most efficient algorithms given a certain dynamical problem. Furthermore, in order to choose the appropriate numerical integrators to compute them, more comparative studies among numerical integrators are also needed. This work deals with both problems. We first extend the work of Maffione et al. (2011) for mappings to the 2D H\\'enon & Heiles (1964) potential, and compare several variational indicators of chaos: the Lyapunov Indicator (LI); the Mean Exponential Growth Factor of Nearby Orbits (MEGNO); the Smaller Alignment Index (SALI) and its generalized version, the Generalized Alignment Index (GALI); the Fast Lyapunov Indicator (FLI) and its variant, the Orthogonal Fast Lyapunov Indicator (OFLI); the Spectral Distance (D) and the Dynamical Spectras of Stretching Numbers (SSNs). We also include in the record the Relative Lyapunov Indicator (RLI), which is not a variational indicator as the others. Then, we test a numerical technique to integrate Ordinary Differential Equations (ODEs) based on the Taylor method implemented by Jorba & Zou (2005) (called taylor), and we compare its performance with other two well-known efficient integrators: the Prince & Dormand (1981) implementation of a Runge-Kutta of order 7-8 (DOPRI8) and a Bulirsch-St\\"oer implementation. These tests are run under two very different systems from the complexity of their equations point of view: a triaxial galactic potential model and a perturbed 3D quartic oscillator.

  17. Progress report on LBL's numerical modeling studies on Cerro Prieto

    SciTech Connect (OSTI)

    Halfman-Dooley, S.E.; Lippman, M.J.; Bodvarsson, G.S.

    1989-04-01T23:59:59.000Z

    An exploitation model of the Cerro Prieto geothermal system is needed to assess the energy capacity of the field, estimate its productive lifetime and develop an optimal reservoir management plan. The model must consider the natural state (i.e., pre-exploitation) conditions of the system and be able to predict changes in the reservoir thermodynamic conditions (and fluid chemistry) in response to fluid production (and injection). This paper discusses the results of a three-dimensional numerical simulation of the natural state conditions of the Cerro Prieto field and compares computed and observed pressure and temperature/enthalpy changes for the 1973--1987 production period. 16 refs., 24 figs., 2 tabs.

  18. MAGNETIZATION DEGREE OF GAMMA-RAY BURST FIREBALLS: NUMERICAL STUDY

    SciTech Connect (OSTI)

    Harrison, Richard; Kobayashi, Shiho, E-mail: R.M.Harrison@2006.ljmu.ac.uk [Astrophysics Research Institute, Liverpool John Moores University, Liverpool, L3 5RF (United Kingdom)

    2013-08-01T23:59:59.000Z

    The relative strength between forward and reverse shock emission in early gamma-ray burst (GRB) afterglow reflects that of magnetic energy densities in the two shock regions. We numerically show that with the current standard treatment, the fireball magnetization is underestimated by up to two orders of magnitude. This discrepancy is especially large in the sub-relativistic reverse shock regime (i.e., the thin shell and intermediate regime), where most optical flashes were detected. We provide new analytic estimates of the reverse shock emission based on a better shock approximation, which well describe numerical results in the intermediate regime. We show that the reverse shock temperature at the onset of afterglow is constant, ( {Gamma}-bar{sub d}-1){approx}8 Multiplication-Sign 10{sup -2}, when the dimensionless parameter {xi}{sub 0} is more than several. Our approach is applied to case studies of GRB 990123 and 090102, and we find that magnetic fields in the fireballs are even stronger than previously believed. However, these events are still likely to be due to a baryonic jet with {sigma} {approx} 10{sup -3} for GRB 990123 and {approx}3 Multiplication-Sign 10{sup -4} to 3 for GRB 090102.

  19. Numerical study of reaction in porous catalysts under composition modulation

    E-Print Network [OSTI]

    Hsiao, Hsu-Wen

    2010-01-01T23:59:59.000Z

    Numerical methods for chemical engineering: applications incycling of the feed." Chemical Engineering Science 54(20): [computer." Computers & Chemical Engineering 26(3): 439-

  20. Remote connector development study

    SciTech Connect (OSTI)

    Parazin, R.J.

    1995-05-01T23:59:59.000Z

    Plutonium-uranium extraction (PUREX) connectors, the most common connectors used at the Hanford site, offer a certain level of flexibility in pipe routing, process system configuration, and remote equipment/instrument replacement. However, these desirable features have inherent shortcomings like leakage, high pressure drop through the right angle bends, and a limited range of available pipe diameters that can be connect by them. Costs for construction, maintenance, and operation of PUREX connectors seem to be very high. The PUREX connector designs include a 90{degree} bend in each connector. This increases the pressure drop and erosion effects. Thus, each jumper requires at least two 90{degree} bends. PUREX connectors have not been practically used beyond 100 (4 in.) inner diameter. This study represents the results of a survey on the use of remote pipe-connection systems in US and foreign plants. This study also describes the interdependence between connectors, remote handling equipment, and the necessary skills of the operators.

  1. NUMERICAL STUDY OF THE VISHNIAC INSTABILITY IN SUPERNOVA REMNANTS

    SciTech Connect (OSTI)

    Michaut, C.; Cavet, C.; Bouquet, S. E.; Roy, F.; Nguyen, H. C., E-mail: claire.michaut@obspm.fr [LUTH, Observatoire de Paris, CNRS, Universite Paris-Diderot, F-92190 Meudon (France)

    2012-11-10T23:59:59.000Z

    The Vishniac instability is thought to explain the complex structure of radiative supernova remnants in their Pressure-Driven Thin Shell (PDTS) phase after a blast wave (BW) has propagated from a central explosion. In this paper, the propagation of the BW and the evolution of the PDTS stage are studied numerically with the two-dimensional (2D) code HYDRO-MUSCL for a finite-thickness shell expanding in the interstellar medium (ISM). Special attention is paid to the adiabatic index, {gamma}, and three distinct values are taken for the cavity ({gamma}{sub 1}), the shell ({gamma}{sub 2}), and the ISM ({gamma}{sub 3}) with the condition {gamma}{sub 2} < {gamma}{sub 1}, {gamma}{sub 3}. This low value of {gamma}{sub 2} accounts for the high density in the shell achieved by a strong radiative cooling. Once the spherical background flow is obtained, the evolution of a 2D-axisymmetric perturbation is computed from the linear to the nonlinear regime. The overstable mechanism, previously demonstrated theoretically by E. T. Vishniac in 1983, is recovered numerically in the linear stage and is expected to produce and enhance anisotropies and clumps on the shock front, leading to the disruption of the shell in the nonlinear phase. The period of the increasing oscillations and the growth rate of the instability are derived from several points of view (the position of the perturbed shock front, mass fluxes along the shell, and density maps), and the most unstable mode differing from the value given by Vishniac is computed. In addition, the influence of several parameters (the Mach number, amplitude and wavelength of the perturbation, and adiabatic index) is examined and for wavelengths that are large enough compared to the shell thickness, the same conclusion arises: in the late stage of the evolution of the radiative supernova remnant, the instability is dampened and the angular initial deformation of the shock front is smoothed while the mass density becomes uniform with the angle. As a result, our model shows that the supernova remnant returns to a stable evolution and the Vishniac instability does not lead to the fragmentation of the shock as predicted by the theory.

  2. Numerical Simulation Study on Transpired Solar Air Collector

    E-Print Network [OSTI]

    Wang, C.; Guan, Z.; Zhao, X.; Wang, D.

    2006-01-01T23:59:59.000Z

    The unglazed transpired solar air collector is now a well-recognized solar air heater for heating outside air directly. In this article, researchers introduced numerical simulation tools into the solar air collector research area, analyzed...

  3. Numerical Simulation Study on Transpired Solar Air Collector

    E-Print Network [OSTI]

    Wang, C.; Guan, Z.; Zhao, X.; Wang, D.

    2006-01-01T23:59:59.000Z

    The unglazed transpired solar air collector is now a well-recognized solar air heater for heating outside air directly. In this article, researchers introduced numerical simulation tools into the solar air collector research area, analyzed...

  4. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    3.2.1 Description of Test Wind Turbine . . . . . .Figure 1.2: Components of a modern wind turbine . . . . . .Experimental and Numerical Seismic Response of a 65-kW Wind

  5. Effective velocities in fractured media: a numerical study using the ...

    E-Print Network [OSTI]

    2002-03-18T23:59:59.000Z

    theories that predict the effective P- and S-wave velocities in fractured materials in ... can be treated only by numerical techniques because analyt- ... apply the rotated staggered grid (Saenger, Gold and Shapiro ..... (r ? 0:2) and for SH-

  6. Numerical study of high heat ux pool boiling heat transfer Ying He a,*, Masahiro Shoji b

    E-Print Network [OSTI]

    Maruyama, Shigeo

    Numerical study of high heat ux pool boiling heat transfer Ying He a,*, Masahiro Shoji b , Shigeo simulation model of boiling heat transfer is proposed based on a numerical macrolayer model [S. Maruyama, M. Shoji, S. Shimizu, A numerical simulation of transition boiling heat transfer, in: Proceedings

  7. Numerical-model developments for stimulation technologies in the Eastern Gas Shales Project

    SciTech Connect (OSTI)

    Barbour, T.G.; Maxwell, D.E.; Young, C.

    1980-01-01T23:59:59.000Z

    These efforts were directed towards the development of a numerical tensile failure model that could be used to make a parameter sensitivity study of the EGSP wellbore stimulation methods for gas recovery in Devonain shales, calculations were performed using the NTS Multi-Frac Mineback Experiments as the geometry, boundary conditions and material properties of the models. Several major accomplishments were achieved during this task. These include: development of a Crack and Void Strain (CAVS) tensile failure model for one-dimensional fracture analysis using the one-dimensional geometries available in SAI's STEALTH 1-D finite-difference code; modification of the original CAVS tensile failure criteria to improve its representation of multiple fracture development by introducing a logic that adjusts the material's tensile strength (both for crack initiation and crack propagation) according to the degree of cracking that has occurred; adding a submodel to CAVS to allow for cracking propping when a crack is reclosed and to require energy to be expanded during this process; adding a submodel to CAVS to allow for crack pressurization when a crack void strain is in communication with the fluid pressure of the borehole; and performing a parameter sensitivity analysis to determine the effect that the material properties of the rock has on crack development, to include the effects of yielding and compaction. Using the CAVS model and its submodels, a series of STEALTH calculations were then performed to estimate the response of the NTS unaugmented Dynafrac experiment. Pressure, acceleration and stress time histories and snapshot data were obtained and should aid in the evaluation of these experiments. Crack patterns around the borehole were also calculated and should be valuable in a comparison with the fracture patterns observed during mineback.

  8. Numerical studies of the metamodel fitting and validation processes

    E-Print Network [OSTI]

    Boyer, Edmond

    algorithms and application to a nuclear safety computer code show the relevance of this new sequential this problem consists in replacing cpu time expensive computer models by cpu inexpensive mathematical functions to fit the metamodel) has to provide adequate space filling properties. We adopt a numerical approach

  9. Black hole free energy during charged collapse: a numerical study

    E-Print Network [OSTI]

    Hugues Beauchesne; Ariel Edery

    2012-05-19T23:59:59.000Z

    We perform a numerical investigation of the thermodynamics during the collapse of a charged (complex) scalar field to a Reissner-Nordstr\\"om (RN) black hole in isotropic coordinates. Numerical work on gravitational collapse in isotropic coordinates has recently shown that the negative of the total Lagrangian approaches the Helmholtz free energy F= E-TS of a Schwarzschild black hole at late times of the collapse (where E is the black hole mass, T the temperature and S the entropy). The relevant thermodynamic potential for the RN black hole is the Gibbs free energy G=E-TS-$\\Phi_H$ Q where Q is the charge and $\\Phi_H$ the electrostatic potential at the outer horizon. In charged collapse, there is a large outgoing matter wave which prevents the exterior from settling quickly to a static state. However, the interior region is not affected significantly by the wave. We find numerically that the interior contribution to the Gibbs free energy is entirely gravitational and accumulates in a thin shell just inside the horizon. The entropy is gravitational in origin and one observes dynamically that it resides on the horizon. We also compare the numerical value of the interior Lagrangian to the expected analytical value of the interior Gibbs free energy for different initial states and we find that they agree to within 10-13%. The two values are approaching each other so that their difference decreases with more evolution time.

  10. RisR1448(EN) Numerical Study of the

    E-Print Network [OSTI]

    is the better understanding of the physics of the aeroelastic motion of wind turbine blades in order to improve of wind turbine blades in order to improve the numerical simulation of such dynamical systems. In previous works, both aerodynamic damping cal- culations and fully-coupled aeroelastic simulations of wind turbine

  11. Numerical studies of the stochastic Korteweg-de Vries equation

    SciTech Connect (OSTI)

    Lin Guang [Division of Applied Mathematics, Brown University, 182 George Street, Box F, Providence, RI 02912 (United States); Grinberg, Leopold [Division of Applied Mathematics, Brown University, 182 George Street, Box F, Providence, RI 02912 (United States); Karniadakis, George Em [Division of Applied Mathematics, Brown University, 182 George Street, Box F, Providence, RI 02912 (United States)]. E-mail: gk@dam.brown.edu

    2006-04-10T23:59:59.000Z

    We present numerical solutions of the stochastic Korteweg-de Vries equation for three cases corresponding to additive time-dependent noise, multiplicative space-dependent noise and a combination of the two. We employ polynomial chaos for discretization in random space, and discontinuous Galerkin and finite difference for discretization in physical space. The accuracy of the stochastic solutions is investigated by comparing the first two moments against analytical and Monte Carlo simulation results. Of particular interest is the interplay of spatial discretization error with the stochastic approximation error, which is examined for different orders of spatial and stochastic approximation.

  12. Numerical study of perfect wetting in quenched QCD

    SciTech Connect (OSTI)

    Brower, R. (Physics Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215 (United States)); Huang, S. (Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)); Potvin, J. (Physics Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215 (United States) Department of Science and Mathematics, Parks College of Saint Louis University, Cahokia, Illinois 62206 (United States)); Rebbi, C.; Ross, J. (Physics Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215 (United States))

    1992-11-15T23:59:59.000Z

    In the quenched approximation of QCD, the high-temperature phase (or gluon plasma phase) will be found in one of three degenerate vacua characterized by the average value of the Polyakov loop. Such vacua can coexist separated by a sharp interface. As {ital T}{r arrow}{ital T}{sub {ital c}}{sup +} (the confinement temperature) confined or glueball matter may be able to grow as a layer along this interface. QCD is said to obey {ital perfect} {ital wetting} if these layers are planar, or {ital imperfect} {ital wetting} if they are shaped like lenses. Evidence for perfect wetting in quenched QCD is studied from a calculation of the surface tension {alpha}{sub {ital p},}{ital p}/{ital T}{sup 3} between two high-temperature plasma phases at {ital T}{sub {ital c}} on a 16{sup 2}{times}32{times}4 lattice. By comparison with the value of the surface tension of a hadron-plasma interface, the data suggest that planar slabs or at least very long lenses develop along the interface, implying that QCD obeys perfect wetting.

  13. Numerical study and optimization of a diffraction grating for surface plasmon excitation

    E-Print Network [OSTI]

    Floreano, Dario

    Numerical study and optimization of a diffraction grating for surface plasmon excitation Gaetan L Laboratory EPFL-STI-NAM, Station 11, CH-1015 Lausanne, Switzerland ABSTRACT The numerical study of plasmonic plasmon polariton wave on a gold-air interface by a diffraction grating. Our calculations are performed

  14. Numerical Study of Induced False Vacuum Decay at High Energies

    E-Print Network [OSTI]

    A. N. Kuznetsov; P. G. Tinyakov

    1995-11-02T23:59:59.000Z

    We calculate numerically the probability $\\exp[ {1\\over\\lambda} F(E/E_{sph},N/N_{sph})]$ of the false vacuum decay in the massive four-dimensional $-\\lambda\\phi^4$ model from multiparticle initial states with fixed number of particles $N$ and energy $E$ greater than the height of the barrier $E_{sph}$. We find that at $E\\lsim 3E_{sph}$ and $N\\lsim 0.4N_{sph}$ the decay is classically forbidden and thus is exponentially suppressed. We argue that the classically forbidden region extends at small $N$ at least up to $E\\sim 10 E_{sph}$ and, most likely, to all energies. Our data suggest that the false vacuum decay induced by two-particle collisions is exponentially suppressed at all energies.

  15. An Integrated Experimental and Numerical Study: Developing a Reaction

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan BlanchAmiteIn The Artesian-City Area,

  16. Experimental and numerical studies of aerosol penetration through screens

    E-Print Network [OSTI]

    Han, Tae Won

    2009-05-15T23:59:59.000Z

    C,f) and the fraction of open area (fOA). Correlations expressing the actual relationships were evolved. Additionally, a model was developed to relate pressure coefficient in terms of correction factor (OAfg) and Reynolds number....

  17. Experimental and numerical studies of aerosol penetration through screens

    E-Print Network [OSTI]

    Han, Tae Won

    2009-05-15T23:59:59.000Z

    C,f) and the fraction of open area (fOA). Correlations expressing the actual relationships were evolved. Additionally, a model was developed to relate pressure coefficient in terms of correction factor (OAfg) and Reynolds number....

  18. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    vertical axis wind turbines (VAWT). For example, in a studyIn another study for a VAWT by Carne and Nord (1983), ahave been successfully applied to a VAWT by Sandia National

  19. Numerical study of energy diffusion in King models

    E-Print Network [OSTI]

    Tom Theuns

    1995-11-07T23:59:59.000Z

    The energy diffusion coefficients D_n(E) (n=1,2) for a system of equal mass particles moving self-consistently in an N-body realisation of a King model are computed from the probability per unit time, P(E, Delta E), that a star with initial energy E will undergo an energy change Delta E. In turn, P is computed from the number of times during the simulation that a particle in a state of given energy undergoes a transition to another state. These particle states are defined directly from the time evolution of E by identifying them with the event occuring between two local maxima in the E(t) curve. If one assumes next that energy changes are uncorrelated between different states, one can use diffusion theory to compute D_n(E). The simulations employ N=512, 2048,... , 32768 particles and are performed using an implementation of Aarseth's direct integrator N-body1 on a massively parallel computer. The more than seven million transitions measured in the largest N simulation provide excellent statistics. The numerically determined D(E)'s are compared against their theoretical counterparts which are computed from phase-space averaged rates of energy change due to independent binary encounters. The overall agreement between them is impressive over most of the energy range, notwithstanding the very different type of approximations involved, giving considerable support to the valid usage of these theoretical expressions to simulate dynamical evolution in Fokker-Planck type calculations.

  20. Numerical Study of Hypersonic Rarefied-Gas Flows About a Toroidal Ballute

    E-Print Network [OSTI]

    Riabov, Vladimir V.

    , pressure distribution, and drag have been found. Keywords: Torus, Balloon Parachute, Transition Rarefied-GasNumerical Study of Hypersonic Rarefied-Gas Flows About a Toroidal Ballute Vladimir V. Riabov investigated numerically using the Direct Simulation Monte-Carlo technique under transition rarefied-gas flow

  1. Numerical Integration Numerical Summation

    E-Print Network [OSTI]

    Cohen, Henri

    Numerical Integration Numerical Summation Numerical Extrapolation Numerical Recipes for Multiprecision Computations #12;Numerical Integration Numerical Summation Numerical Extrapolation Multiprecision, integration, summation, extrapolation, evaluation of continued fractions, Euler products and sums, complete

  2. Experimental and numerical study of laminar forced convection heat transfer for a dimpled heat sink

    E-Print Network [OSTI]

    Park, Do Seo

    2009-05-15T23:59:59.000Z

    EXPERIMENTAL AND NUMERICAL STUDY OF LAMINAR FORCED CONVECTION HEAT TRANSFER FOR A DIMPLED HEAT SINK A Thesis by DO SEO PARK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 2007 Major Subject: Mechanical Engineering EXPERIMENTAL AND NUMERICAL STUDY OF LAMINAR FORCED CONVECTION HEAT TRANSFER FOR A DIMPLED HEAT SINK A Thesis by DO SEO PARK...

  3. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    studied were vertical axis wind turbines, which are nottesting of vertical axis wind turbines (VAWT). For example,vertical axis turbines (VAWTs). Gradually, as the industry matured, most design concepts standardized on horizontal axis wind turbines (

  4. Experimental and Numerical Studies of Aluminum-Alumina Composites

    E-Print Network [OSTI]

    Gudlur, Pradeep

    2013-07-22T23:59:59.000Z

    The preliminary goal of this study is to determine the effects of processing conditions, compositions and microstructural morphologies of the constituents on the physical and thermo-mechanical properties of alumina (Al_2O_3) reinforced aluminum (Al...

  5. Experimental and Numerical Studies of Aluminum-Alumina Composites

    E-Print Network [OSTI]

    Gudlur, Pradeep

    2013-07-22T23:59:59.000Z

    with temperatures. Secondly, the goal of this study is to determine the effect of microstructures on the effective thermo-mechanical properties of the manufactured Al-Al_2O_3 composites using finite element (FE) method. Software OOF was used to convert the SEM...

  6. TACKLEY ET AL.:THERMO-CHEMICAL PHILOSOPHY Numerical and laboratory studies of mantle convection: Philosophy,

    E-Print Network [OSTI]

    Tackley, Paul J.

    TACKLEY ET AL.:THERMO-CHEMICAL PHILOSOPHY 1 Numerical and laboratory studies of mantle convection: Philosophy, accomplishments and thermo-chemical structure and evolution Paul J. Tackley Department of Earth

  7. Numerical and analytical studies of single and multiphase starting jets and plumes

    E-Print Network [OSTI]

    Wang, Ruo-Qian

    2014-01-01T23:59:59.000Z

    Multiphase starting jets and plumes are widely observed in nature and engineering systems. An environmental engineering example is open-water disposal of sediments. The present study numerically simulates such starting ...

  8. Interaction of a spark-generated bubble with a rubber beam: Numerical and experimental study

    E-Print Network [OSTI]

    Gong, S. W.

    In this paper, the physical behaviors of the interaction between a spark-generated bubble and a rubber beam are studied. Both numerical and experimental approaches are employed to investigate the bubble collapse near the ...

  9. Comprehensive Mechanisms for Combustion Chemistry: An Experimental and Numerical Study with Emphasis on Applied Sensitivity Analysis

    SciTech Connect (OSTI)

    Dryer, Frederick L.

    2009-04-10T23:59:59.000Z

    This project was an integrated experimental/numerical effort to study pyrolysis and oxidation reactions and mechanisms for small-molecule hydrocarbon structures under conditions representative of combustion environments. The experimental aspects of the work were conducted in large-diameter flow reactors, at 0.3 to 18 atm pressure, 500 to 1100 K temperature, and 10-2 to 2 seconds reaction time. Experiments were also conducted to determine reference laminar flame speeds using a premixed laminar stagnation flame experiment and particle image velocimetry, as well as pressurized bomb experiments. Flow reactor data for oxidation experiments include: (1)adiabatic/isothermal species time-histories of a reaction under fixed initial pressure, temperature, and composition; to determine the species present after a fixed reaction time, initial pressure; (2)species distributions with varying initial reaction temperature; (3)perturbations of a well-defined reaction systems (e.g. CO/H2/O2 or H2/O2)by the addition of small amounts of an additive species. Radical scavenging techniques are applied to determine unimolecular decomposition rates from pyrolysis experiments. Laminar flame speed measurements are determined as a function of equivalence ratio, dilution, and unburned gas temperature at 1 atm pressure. Hierarchical, comprehensive mechanistic construction methods were applied to develop detailed kinetic mechanisms which describe the measurements and literature kinetic data. Modeling using well-defined and validated mechanisms for the CO/H2/Oxidant systems and perturbations of oxidation experiments by small amounts of additives were also used to derive absolute reaction rates and to investigate the compatibility of published elementary kinetic and thermochemical information. Numerical tools were developed and applied to assess the importance of individual elementary reactions to the predictive performance of the developed mechanisms and to assess the uncertainties in elementary rate constant evaluations.

  10. A numerical study of the baroclinic circulation in the Gulf of Maine

    E-Print Network [OSTI]

    Bogusky, Joseph Clayton

    1985-01-01T23:59:59.000Z

    A NUMERICAL STUDY OF THE BAROCLINIC CIRCULATION IN THE GULF OF MAINE A Thesis JOSEPH CLAYTON BOGUSKY Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... AUGUST 1985 Major Subject: Oceanography A NUMERICAL STUDY OF THE BAROCLINIC CIRCULATION IN THE GULF OF MAINE A Thesis by JOSEPH CLAYTON BOGUSXY Approved as to style and content by: David A. Brooks (Chairman) David C. Smith IV (Member) John M...

  11. A numerical study of seasonal circulation in the Gulf of Cariaco

    E-Print Network [OSTI]

    Lopez-Garcia, Annick Jean

    1984-01-01T23:59:59.000Z

    A NUMERICAL STUDY OF SEASONAL CIRCULATION ZN THE GULF OF CARIACO A Thesis ANNICX JEAN LOPEZ-GARCIA Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... December 1984 Major Subject: Oceanography A NUMERICAL STUDY OF SEASONAL CIRCULATION IN THE GULF OF CARIACO A Thesis by ANNICK JEAN LOPEZ-GARCIA approved as to style and content by: JOHN M. KLINCK (Chairman of Committee) ANDREW C. VA ANO (Member...

  12. Development of a Numerical Simulator for Analyzing the Geomechanical Performance of Hydrate-Bearing Sediments

    SciTech Connect (OSTI)

    Rutqvist, Jonny; Rutqvist, J.; Moridis, G.J.

    2008-06-01T23:59:59.000Z

    In this paper, we describe the development and application of a numerical simulator that analyzes the geomechanical performance of hydrate-bearing sediments, which may become an important future energy supply. The simulator is developed by coupling a robust numerical simulator of coupled fluid flow, hydrate thermodynamics, and phase behavior in geologic media (TOUGH+HYDRATE) with an established geomechanical code (FLAC3D). We demonstrate the current simulator capabilities and applicability for two examples of geomechanical responses of hydrate bearing sediments during production-induced hydrate dissociation. In these applications, the coupled geomechanical behavior within hydrate-bearing seducements are considered through a Mohr-Coulomb constitutive model, corrected for changes in pore-filling hydrate and ice content, based on laboratory data. The results demonstrate how depressurization-based gas production from oceanic hydrate deposits may lead to severe geomechanical problems unless care is taken in designing the production scheme. We conclude that the coupled simulator can be used to design production strategies for optimizing production, while avoiding damaging geomechanical problems.

  13. New Mexico renewable development study

    SciTech Connect (OSTI)

    Toole, Gasper [Los Alamos National Laboratory; Bent, Russell [Los Alamos National Laboratory; Ewers, Mary [Los Alamos National Laboratory

    2010-09-17T23:59:59.000Z

    Since the early 1990s, Los Alamos National Laboratory (LANL) has applied electric grid models and simulation software to problems of national significance. This effort continues with a variety of other projects funded by the Department of Energy (DOE), other federal and state agencies and private companies. Critical to the success of these programs is the ability to integrate regional-scale models of the electric grid, to assess the propagation of grid impacts, and to present interactively the effect of potential mitigating actions required to stabilize the grid. All of these capabilities are applied in this study, to accomplish the following goals and objectives: (1) Develop an AC power flow model representing future conditions within New Mexico's electric grid, using commercial tools accepted by the utility industry; (2) Conduct a 'screening' analysis of options for accelerating potential renewable energy development through the addition of a statewide transmission collector system; (3) Estimate total revenue needed, jobs created (temporary and permanent) plus indirect and direct impacts to the state's economy; (4) Evaluate potential cost allocation methodology; and (5) Issue a project report that will provide information for policy direction by state regulators, project developers, and legislators.

  14. A Numerical Study of Methods for Moist Atmospheric Flows: Compressible Equations

    E-Print Network [OSTI]

    Duarte, Max; Balakrishnan, Kaushik; Bell, John B; Romps, David M

    2013-01-01T23:59:59.000Z

    We investigate different numerical techniques for evolving moist atmospheric flows within a fully compressible framework. In the standard numerical approach, the choice of variables is motivated by those that remain invariant in dry adiabatic flow, phase transitions are treated as an external energy source, and the physically-irrelevant fast acoustic modes are decoupled during the numerical integration. For the purposes of this study, we consider the compressible Euler equations in terms of the primitive thermodynamic variables, namely density, momentum, and total energy of moist air, without any special numerical treatment of the fast acoustic dynamics. This allows us to incorporate consistent moist thermodynamic properties throughout the numerical solution, and to thoroughly investigate both the standard two-step splitting approach for moist atmospheric flows as well as a fully coupled technique based on the use of variables that are conserved in moist flows, i.e. total energy of moist air and total water c...

  15. A numerical study of longtime dynamics and ergodic-nonergodic transitions in dense simple fluids

    E-Print Network [OSTI]

    David D. McCowan

    2014-11-04T23:59:59.000Z

    For over 30 years, mode-coupling theory (MCT) has been the de facto theoretic description of dense fluids and the liquid-glass transition. MCT, however, is limited by its ad hoc construction and lacks a mechanism to institute corrections. We use recent results from a new theoretical framework--developed from first principles via a self-consistent perturbation expansion in terms of an effective two-body potential--to numerically explore the kinetics of systems of classical particles, specifically hard spheres obeying Smoluchowski dynamics. We present here a full solution to the kinetic equation governing the density-density time correlation function and show that the function exhibits the characteristic two-step decay of supercooled fluids and an ergodic-nonergodic transition to a dynamically-arrested state. Unlike many previous numerical studies and experiments, we have access to the full time and wavenumber range of the correlation function and can track the solution unprecedentedly close to the transition, covering nearly 15 decades of time. Using asymptotic approximation techniques developed for MCT, we fit the solution to predicted forms and extract critical parameters. Our solution shows a transition at packing fraction $\\eta^*=0.60149761(10)$--consistent with previous static solutions under this theory and with comparable colloidal suspension experiments--and the behavior in the $\\beta$-relaxation regime is fit to power-law decays with critical exponents $a=0.375(3)$ and $b=0.8887(4)$, and with $\\lambda=0.5587(18)$. For the $\\alpha$-relaxation of the ergodic phase, we find a power-law divergence of the time scale $\\tau_{\\alpha}$ as we approach the transition. Through these results, we establish that this new theory is able to reproduce the salient features of MCT, but has the advantages of a first principles derivation and a clear mechanism for making systematic improvements.

  16. Sustainable Development: Case Studies & Lessons Learned

    E-Print Network [OSTI]

    Netoff, Theoden

    Sustainable Development: Case Studies & Lessons Learned Prepared For City of Rosemount UMore Development LLC PA 8081 Capstone: Sustainability Planning Humphrey School of Public Affairs University studies that analyze how local and national developments have either successfully implemented sustainable

  17. Studies on the development of Gambusia affinis

    E-Print Network [OSTI]

    Medlen, Ammon Brown

    1952-01-01T23:59:59.000Z

    STUDIES ON THE DEVELOPMENT OF GAMBUSIA AFFINIS A Dissertation By STTUD maim TIEOID Approved as to style and content by: (Head o? Department) Ifey 19^2 STUDIES ON THE DEVELOPMENT OF GA.MBUSIA. AFFINIS By AMMON BRCWN MEDLEN A Dissertation... .................................... ..... . 9k Photomicrographs .......................................... . 102 Summary ...................................?.... . 10li Bibliography ...... ........ ...... ...... . 106 Page 1 STUDIES ON THE DEVELOPMENT OF GAUBU5IA AFFINIS INTRODUCTION...

  18. A Study of Institutional Factors Affecting Water Resource Development in the Lower Rio Grande Valley, Texas

    E-Print Network [OSTI]

    Trock, W. L.; Casbeer, T. J.

    1969-01-01T23:59:59.000Z

    Despite numerous studies of and plans for the use of land and water resources of the lower Rio Grande Valley for efficient agricultural production, development has lagged and the production potential has not been realized. ...

  19. ForPeerReview Numerical and Comparative Study of the Agility of Planar

    E-Print Network [OSTI]

    Boyer, Edmond

    ForPeerReview 1 Numerical and Comparative Study of the Agility of Planar Transmission Lines printed transmission lines (TL) printed on a ferroelectric thin film deposited on sapphire and lanthanum aluminate: Ferroelectric thin films, Planar transmission lines, Tunability, KTaxNb1-xO3, BaxSr1-xTiO3 Author's affiliations

  20. A Numerical Sensitivity Study of Aerosol Influence on Immersion Freezing in Mixed-Phase Stratiform Clouds

    E-Print Network [OSTI]

    Eloranta, Edwin W.

    freezing in a mixed-phase stratiform cloud. Immersion freez- ing is represented using a parameterization, and the larger droplets nucleate into ice particles through the immersion freezing process. In mixed-phaseA Numerical Sensitivity Study of Aerosol Influence on Immersion Freezing in Mixed-Phase Stratiform

  1. Numerical study of the thermoelectric power factor in ultra-thin Si nanowires

    E-Print Network [OSTI]

    1 Numerical study of the thermoelectric power factor in ultra-thin Si nanowires Neophytos Neophytou thermoelectric (TE) performance because of a drastic reduction in their thermal conductivity, l. This has been observed for a variety of materials, even for traditionally poor thermoelectrics such as silicon. Other

  2. Introduction The general subject of this dissertation is the numerical study of shock

    E-Print Network [OSTI]

    De Sterck, Hans

    Chapter 1 Introduction The general subject of this dissertation is the numerical study of shock with shocks on macroscopic scales. The MHD description of a plasma is adopted in this dissertation. The results to be presented in this dissertation aim at contributing to the general theory of shock phenomena

  3. Numerical study of macrosegregation in Aluminum alloys solidifying on uneven surfaces

    E-Print Network [OSTI]

    Zabaras, Nicholas J.

    Numerical study of macrosegregation in Aluminum alloys solidifying on uneven surfaces Deep Samanta Solidification of Aluminum alloys is modeled on uneven surfaces characterized by sinusoidal curves. Wavelengths of solid and liquid phases. During horizontal solidification of an Aluminum alloy from uneven surfaces

  4. Previous studies have shown that positive affect has numerous health benefits in Western Cultures (Pressman &

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Printed by Previous studies have shown that positive affect has numerous health benefits in Western is equally beneficial for health across different cultural contexts. Particularly, in East Asian culture in isolation from social relationships may not be beneficial or even harmful for one's health. (Miyamoto

  5. Numerical Study of Steady Turbulent Flow through Bifurcated Nozzles in Continuous Casting

    E-Print Network [OSTI]

    Thomas, Brian G.

    . The effects of nozzle design and casting process operating variables on the jet characteristics exitingNumerical Study of Steady Turbulent Flow through Bifurcated Nozzles in Continuous Casting FADY M. NAJJAR, BRIAN G. THOMAS, and DONALD E. HERSHEY Bifurcated nozzles are used in continuous casting

  6. Analytical and numerical studies of heavy ion beam transport in the fusion chamber

    E-Print Network [OSTI]

    Kaganovich, Igor

    Analytical and numerical studies of heavy ion beam transport in the fusion chamber IGOR D to acceptable levels. During ion beam propagation in the chamber, electrons are drawn into the beam, Princeton, New Jersey 08543, USA Abstract The propagation of a high-current finite-length ion charge bunch

  7. A numerical modeling study on desert oasis self-supporting mechanisms

    E-Print Network [OSTI]

    Chu, Peter C.

    A numerical modeling study on desert oasis self-supporting mechanisms Peter C. Chua, *, Shihua Lub February 2005 Abstract Oasis self-supporting mechanisms due to oasis breeze circulation (OBC) are proposed from the oasis makes the oasis surface colder than the surrounding desert surface. The sensible heat

  8. Numerical simulation and sensitivity study of a severe hailstorm in northeast Spain

    E-Print Network [OSTI]

    Romero, Romu

    Numerical simulation and sensitivity study of a severe hailstorm in northeast Spain E. García Atmósfera, Instituto de Medio Ambiente, Universidad de León, 24071 León, Spain b Grup de Meteorologia, Departament de Física, Universitat de les Illes Balears, Palma de Mallorca, Spain Accepted 8 August 2005

  9. PhD position: Numerical study on ice accretion on fan blades and compressor stages

    E-Print Network [OSTI]

    Twente, Universiteit

    PhD position: Numerical study on ice accretion on fan blades and compressor stages Within on fan blades and compressor stages. This research is carried out in the framework of the HAIC (High a computational tool to predict the ice accretion on fan blades and the first compressor stages of commercial jet

  10. Numerical study of natural convection in a vertical porous annulus with discrete heating

    E-Print Network [OSTI]

    Lopez, John M.

    Numerical study of natural convection in a vertical porous annulus with discrete heating M. Sankar online 20 December 2010 Keywords: Natural convection Annulus Discrete heating Porous medium Radii ratio to discrete heating. The outer wall is maintained iso- thermally at a lower temperature, while the top

  11. Case Study: A Visual Tool for Moving Mesh Numerical Methods Daryl H. Hepting \\Lambda

    E-Print Network [OSTI]

    Zhang, Richard "Hao"

    . Com puter visualization of moving mesh methods is an extension of an approach using computersCase Study: A Visual Tool for Moving Mesh Numerical Methods Daryl H. Hepting \\Lambda darylh differential equations are indispensable in scientific and engineering research, where they are used to model

  12. Electrohydrodynamic induction and conduction pumping of dielectric liquid film: theoretical and numerical studies

    E-Print Network [OSTI]

    Al Dini, Salem A. S.

    2007-04-25T23:59:59.000Z

    . The theoretical model is further extended to study the effect of EHD conduction phenomenon for a two-phase flow (i.e. a stratified liquid/ vapor medium). The numerical results presented confirm the concept of liquid film net flow generation with the EHD conduction...

  13. Experimental and numerical study of the evolution of stored and dissipated energies in a medium carbon

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Experimental and numerical study of the evolution of stored and dissipated energies in a medium estimations of the fatigue limit from energy-based fatigue criteria, consti- tutive laws must include a correct description of the energy balance when modeling the cyclic behavior. The present paper aims

  14. NAO influence on net sea ice production and exchanges in the Arctic region: a numerical study

    E-Print Network [OSTI]

    Hu, Aixue

    NAO influence on net sea ice production and exchanges in the Arctic region: a numerical study Aixue The variability of net sea ice production and sea ice exchange between the Arctic and its adjacent seas export) is the major factor controlling the net sea ice production in the Arctic region since a thinning

  15. Numerical study of the effect of polyurea on the performance of steel plates under blast loads

    E-Print Network [OSTI]

    Nemat-Nasser, Sia

    Numerical study of the effect of polyurea on the performance of steel plates under blast loads to blast-like loads. Different thicknesses of the polyurea are considered and the effect of polyurea history: Received 28 February 2013 Available online 13 May 2013 Keywords: Polyurea DH-36 steel Blast

  16. Analytical and Numerical Study of Joule Heating Effects on Electrokinetically Pumped Continuous Flow PCR Chips

    E-Print Network [OSTI]

    Le Roy, Robert J.

    Analytical and Numerical Study of Joule Heating Effects on Electrokinetically Pumped Continuous, and the potential for integration.1-3 Joule heating is inevitable when electrokinetic pumping is used Form: December 8, 2007 Joule heating is an inevitable phenomenon for microfluidic chips involving

  17. A numerical and experimental study of counterflow syngas flames at different pressures

    E-Print Network [OSTI]

    Aggarwal, Suresh K.

    A numerical and experimental study of counterflow syngas flames at different pressures S. Som, A Synthesis gas or ``Syngas'' is being recognized as a viable energy source worldwide, particularly. There are, however, gaps in the fundamental understanding of syngas combustion and emissions characteristics

  18. Experimental and numerical study of e-beam evaporation of titanium

    SciTech Connect (OSTI)

    McClelland, M.A.; Westerberg, K.W.; Meier, T.C. [Lawrence Livermore National Lab., CA (United States)] [and others

    1996-12-31T23:59:59.000Z

    An experimental and numerical study is performed for the electron-beam evaporation of pure titanium from a bottom fed vapor source. In the experiments, an electron beam operating in the nominal range of 30-40 [kW] was used to evaporate metal from the top of a 3 [in] diameter rod. Variations were made in the e-beam power, sweep pattern, and sweep frequency, and the total evaporation rate was measured from feed consumption and laser absorption. The solid-pool interface was obtained from metallographic cross sections of the metal rod. A two-dimensional finite element model was developed for the melt which includes the effect of fluid flow and energy transport in the pool and conduction in the solid. The deformation of the liquid-vapor and solid-liquid interfaces are tracked using a mesh which stretches along spines parallel to the axis of the rod. For the cases considered, high evaporative fluxes and vapor pressures generate significant depressions in the top surface of the pool. Predicted and measured evaporation rates are in good agreement for moderate evaporation fluxes, but discrepancies are larger for the case involving the highest flux and deepest depression.

  19. Experimental and numerical study of E-beam evaporation of titanium

    SciTech Connect (OSTI)

    McClelland, M.A.; Westerberg, K.W.; Meier, T.C.; Braun, D.G.; Berrins, L.V.; Anklam, T.M. Storer, J.

    1997-11-26T23:59:59.000Z

    An experimental and numerical study is performed for the electron- beam evaporation of pure titanium from a bottom fed vapor source. In the experiments, an electron beam operating in the nominal range of 30-40 [kW] was used to evaporate metal from the top of a 3 inch diameter rod. Variations were made in the e-beam power, sweep pattern, and sweep frequency, and the total evaporation rate was measured from feed consumption and laser absorption. The solid-pool interface was obtained from metallographic cross sections of the metal rod. A two-dimensional finite element model was developed for the melt which includes the effect of fluid flow and energy transport in the pool and conduction in the solid. The deformation of the liquid-vapor and solid-liquid interfaces are tracked using a mesh which stretches along spines parallel to the axis of the rod. For the cases considered, high evaporative fluxes and vapor pressures generate significant depressions in the top surface of the pool. Predicted and measured evaporation rates are in good agreement for moderate evaporation fluxes, but discrepancies are larger for the case involving the highest flux and deepest depression.

  20. PROBABILISTIC SIMULATION OF SUBSURFACE FLUID FLOW: A STUDY USING A NUMERICAL SCHEME

    SciTech Connect (OSTI)

    Buscheck, Timothy Eric

    1980-03-01T23:59:59.000Z

    There has been an increasing interest in probabilistic modeling of hydrogeologic systems. The classical approach to groundwater modeling has been deterministic in nature, where individual layers and formations are assumed to be uniformly homogeneous. Even in the case of complex heterogeneous systems, the heterogeneities describe the differences in parameter values between various layers, but not within any individual layer. In a deterministic model a single-number is assigned to each hydrogeologic parameter, given a particular scale of interest. However, physically there is no such entity as a truly uniform and homogeneous unit. Single-number representations or deterministic predictions are subject to uncertainties. The approach used in this work models such uncertainties with probabilistic parameters. The resulting statistical distributions of output variables are analyzed. A numerical algorithm, based on axiomatic principles of probability theory, performs arithmetic operations between probability distributions. Two subroutines are developed from the algorithm and incorporated into the computer program TERZAGI, which solves groundwater flow problems in saturated, multi-dimensional systems. The probabilistic computer program is given the name, PROGRES. The algorithm has been applied to study the following problems: one-dimensional flow through homogeneous media, steady-state and transient flow conditions, one-dimensional flow through heterogeneous media, steady-state and transient flow conditions, and two-dimensional steady-stte flow through heterogeneous media. The results are compared with those available in the literature.

  1. Capacitor placement and real time control in large-scale unbalanced distribution systems: Numerical studies

    SciTech Connect (OSTI)

    Wang, J.C.; Chiang, H.D.; Miu, K.N. [Cornell Univ., Ithaca, NY (United States). School of Electrical Engineering; Darling, G. [NYSEG Corp., Binghamton, NY (United States). Distribution System Dept.

    1997-04-01T23:59:59.000Z

    A novel solution algorithm for capacitor placement and real-time control in real large-scale unbalanced distribution systems is evaluated and implemented to determine the number, locations, sizes, types and control schemes of capacitors to be placed on large-scale unbalanced distribution systems. A detailed numerical study regarding the solution algorithm in large scale unbalanced distribution systems is undertaken. Promising numerical results on both 292 bus and 394 bus real unbalanced distribution systems containing unbalanced loads and phasing and various types of transformers are presented. The computational performance for the capacitor control problem under load variations is encouraging.

  2. A study of some methods of numerical integration using floating point arithmetic

    E-Print Network [OSTI]

    Young, John Mackay

    1959-01-01T23:59:59.000Z

    IN NUMERICAL INTEGRATION e ~ ~ e ~ ~ ~ ~ ~ e EVALUATION OF A FRESNEL INTEGRAL AS A POWER SERIES EXPANSION a ~ ~ o ~ ~ ~ ~ ~ DISCUSSIOM OF TWO MAJOR SOURCES OF ERROR WHEN INTEGRATING USING FLOATIMG POINT ARITHNEPICa e ~ ~ a ~ ~ e ~ ~ ~ ~ e ~ ~ ~ ~ 13 V...(x) ~ 10 for 0 c x c 10 f(x) = -10x + 110 for 10 c x c 11 ))0 c x c, 85 One of the Fresnel integrals was chosen because the Fresnel integrals are interesting to physicists as well as mathematicians. It was used only in the study of numerical...

  3. International Development Studies Additional Requirement Form

    E-Print Network [OSTI]

    International Development Studies Additional Requirement Form The IDS additional program email. You may find additional scheduled possibilities by looking at the International Programs

  4. Numerical study of corrosion of ferritic/martensitic steels in the flowing PbLi with and without a magnetic field

    E-Print Network [OSTI]

    Abdou, Mohamed

    Numerical study of corrosion of ferritic/martensitic steels in the flowing PbLi with and without s t r a c t A computational suite called TRANSMAG has been developed to address corrosion of ferritic/martensitic steels and associated transport of corrosion products in the eutectic alloy PbLi as applied to blankets

  5. A numerical study of the effects of superhydrophobic surface on skin-friction drag in turbulent channel flow

    E-Print Network [OSTI]

    Kim, John

    A numerical study of the effects of superhydrophobic surface on skin- friction drag in turbulent;PHYSICS OF FLUIDS 25, 110815 (2013) A numerical study of the effects of superhydrophobic surface on skin; accepted 21 May 2013; published online 11 September 2013) Superhydrophobic surfaces have attracted much

  6. Numerical study of Kelvin-Helmholtz instability by the point vortex method

    SciTech Connect (OSTI)

    Krasny, R.

    1983-01-01T23:59:59.000Z

    Rosenhead's classical point vortex numerical method for studying the evolution of a vortex sheet from analytic initial data (Kelvin-Helmholtz instability) is examined using the discrete Fourier analysis techniques of Sulem, Sulem and Frisch. One cause for the chaotic motion previously observed in computations using a large number of vortices is that short wavelength perturbations are introduced spuriously by finite precision arithmetic and become amplified by the model's dynamics. Methods for controlling this source of error are given, and the results confirm the formation of a singularity in a finite time which was previously found by Moore and Meiron, Baker and Orszag using different techniques of analysis. A cusp forms in the vortex sheet strength at the critical time, explaining the onset of erratic particle motion in applications of the numerical methods of Van de Vooren and Fink and Soh to this problem. Unlike those methods, the point vortex approximation remains consistent at the critical time and results of a long time calculation are presented. The singularity is interpreted physically as a discontinuity in the strain rate along the vortex sheet and also as the start of roll up on a small scale. The author numerically studies some aspects of the dependence of the solution on the initial condition and finds agreement with Moore's asymptotic relation between the initial amplitude and the critial time.

  7. COSMOCR: A Numerical Code for Cosmic Ray Studies in Computational Cosmology

    E-Print Network [OSTI]

    Francesco Miniati

    2001-05-25T23:59:59.000Z

    We present COSMOCR, a numerical code for the investigation of cosmic ray related studies in computational cosmology. The code follows the diffusive shock acceleration, the mechanical and radiative energy losses and the spatial transport of the supra-thermal particles in cosmic environment. Primary cosmic ray electrons and ions are injected at shocks according to the thermal leakage prescription. Secondary electrons are continuously injected as a results of p-p inelastic collisions of primary cosmic ray ions and thermal background nuclei. The code consists of a conservative, finite volume method with a power-law sub-grid model in momentum space. Two slightly different schemes are implemented depending on the stiffness of the cooling terms. Comparisons of numerical results with analytical solution for a number of tests of direct interest show remarkable performance of the present code.

  8. Numerical study of Alfvn eigenmodes in the Experimental Advanced Superconducting Tokamak

    SciTech Connect (OSTI)

    Hu, Youjun, E-mail: yjhu@ipp.cas.cn [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Li, Guoqiang; Yang, Wenjun; Zhou, Deng; Ren, Qilong [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Gorelenkov, N. N. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451 (United States); Cai, Huishan [Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)

    2014-05-15T23:59:59.000Z

    Alfvn eigenmodes in up-down asymmetric tokamak equilibria are studied by a new magnetohydrodynamic eigenvalue code. The code is verified with the NOVA code for the Solovv equilibrium and then is used to study Alfvn eigenmodes in a up-down asymmetric equilibrium of the Experimental Advanced Superconducting Tokamak. The frequency and mode structure of toroidicity-induced Alfvn eigenmodes are calculated. It is demonstrated numerically that up-down asymmetry induces phase variation in the eigenfunction across the major radius on the midplane.

  9. A numerical study of crack initiation in a bcc iron system based on dynamic bifurcation theory

    SciTech Connect (OSTI)

    Li, Xiantao, E-mail: xli@math.psu.edu [Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

    2014-10-28T23:59:59.000Z

    Crack initiation under dynamic loading conditions is studied under the framework of dynamic bifurcation theory. An atomistic model for BCC iron is considered to explicitly take into account the detailed molecular interactions. To understand the strain-rate dependence of the crack initiation process, we first obtain the bifurcation diagram from a computational procedure using continuation methods. The stability transition associated with a crack initiation, as well as the connection to the bifurcation diagram, is studied by comparing direct numerical results to the dynamic bifurcation theory [R. Haberman, SIAM J. Appl. Math. 37, 69106 (1979)].

  10. Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes

    E-Print Network [OSTI]

    Fullerton, Tracy

    2012-02-14T23:59:59.000Z

    characterized by cyclic variations of flow parameters such as stream-wise or cross-stream velocity. A computer code was developed to perform the numerical simulations. Spatial discretization was based upon a Control Volume Finite Element Method (CVFEM...

  11. Development and validation of a vertically two-dimensional mesoscale numerical model

    E-Print Network [OSTI]

    Walters, Michael Kent

    1985-01-01T23:59:59.000Z

    values of model variables for static test and kinetic energy calculations . . . . . . . . . 25 2 Results of kinetic energy budget calculations . . 29 ? 1 -5 Surface heating rate (K s x 10 ) . . . . . . . 32 4 Initial values of variables for nonlinear.... These tests provide an important means of debugging the numerical scheme. The validation tests performed on the mesoscale model consisted of a simple static test, calculation of the mass continuity and the kinet. ic energy budget, and performing non...

  12. Numerical study of blow-up in solutions to generalized Korteweg-de Vries equations

    E-Print Network [OSTI]

    C. Klein; R. Peter

    2014-11-14T23:59:59.000Z

    We present a detailed numerical study of solutions to general Korteweg-de Vries equations with critical and supercritical nonlinearity. We study the stability of solitons and show that they are unstable against being radiated away and blow-up. In the $L_{2}$ critical case, the blow-up mechanism by Martel, Merle and Rapha\\"el can be numerically identified. In the limit of small dispersion, it is shown that a dispersive shock always appears before an eventual blow-up. In the latter case, always the first soliton to appear will blow up. It is shown that the same type of blow-up as for the perturbations of the soliton can be observed which indicates that the theory by Martel, Merle and Rapha\\"el is also applicable to initial data with a mass much larger than the soliton mass. We study the scaling of the blow-up time $t^{*}$ in dependence of the small dispersion parameter $\\epsilon$ and find an exponential dependence $t^{*}(\\epsilon)$ and that there is a minimal blow-up time $t^{*}_{0}$ greater than the critical time of the corresponding Hopf solution for $\\epsilon\\to0$. To study the cases with blow-up in detail, we apply the first dynamic rescaling for generalized Korteweg-de Vries equations. This allows to identify the type of the singularity.

  13. Numerical tools for the theoretical study of QCD at small x

    E-Print Network [OSTI]

    A. Sabio Vera; P. Stephens

    2006-11-09T23:59:59.000Z

    In this contribution we present the status of two numerical tools designed to study the small x limit of QCD. The first one is a Monte Carlo simulation of the BFKL evolution equation. In design of this approach emphasis has been placed on exploiting the linear behaviour that many variants of the BFKL evolution possess. This allows us to design a procedure which can be used to study theoretical and phenomenological aspects of different kernels. The second one is a semi-analytic approach to study Lipatov's effective action which describes Reggeon interactions. The study of the properties of this action is very complicated and we propose using a computational tool to handle the large amount of non--local vertices and the derivation of higher order corrections.

  14. Experimental and Numerical Study of Molecular Mixing Dynamics in Rayleigh- Taylor Unstable Flows

    E-Print Network [OSTI]

    Mueschke, Nicholas J.

    2010-01-16T23:59:59.000Z

    of Department, Dennis O?Neal May 2008 Major Subject: Mechanical Engineering iii ABSTRACT Experimental and Numerical Study of Molecular Mixing Dynamics in Rayleigh?Taylor Unstable Flows. (May 2008) Nicholas J. Mueschke, B.S., University of Louisiana... at Lafayette; M.S., Texas A&M University Chair of Advisory Committee: Dr. Malcolm J. Andrews Experiments and simulations were performed to examine the complex processes that occur in Rayleigh?Taylor driven mixing. A water channel facility was used to examine a...

  15. Numerical studies of third-harmonic generation in laser filament in air perturbed by plasma spot

    SciTech Connect (OSTI)

    Feng Liubin [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190 (China); Institute of Atomic and Molecular Physics and Department of Physics, Sichuan University, Chengdu 610065 (China); Lu Xin; Liu Xiaolong; Li Yutong; Chen Liming; Ma Jinglong; Dong Quanli; Wang Weimin [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190 (China); Xi Tingting [College of Physical Sciences, Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Sheng Zhengming; Zhang Jie [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190 (China); Key Laboratory for Laser Plasmas of the Ministry of Education of China and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); He Duanwei [Institute of Atomic and Molecular Physics and Department of Physics, Sichuan University, Chengdu 610065 (China)

    2012-07-15T23:59:59.000Z

    Third-harmonic emission from laser filament intercepted by plasma spot is studied by numerical simulations. Significant enhancement of the third-harmonic generation is obtained due to the disturbance of the additional plasma. The contribution of the pure plasma effect and the possible plasma-enhanced third-order susceptibility on the third-harmonic generation enhancement are compared. It is shown that the plasma induced cancellation of destructive interference [Y. Liu et al., Opt. Commun. 284, 4706 (2011)] of two-colored filament is the dominant mechanism of the enhancement of third-harmonic generation.

  16. Numerical study on microwave-sustained argon discharge under atmospheric pressure

    SciTech Connect (OSTI)

    Yang, Y.; Hua, W., E-mail: huaw@scu.edu.cn; Guo, S. Y. [School of Electronics and Information Engineering, Sichuan University, Chengdu 610065 (China)] [School of Electronics and Information Engineering, Sichuan University, Chengdu 610065 (China)

    2014-04-15T23:59:59.000Z

    A numerical study on microwave sustained argon discharge under atmospheric pressure is reported in this paper. The purpose of this study is to investigate both the process and effects of the conditions of microwave-excited gas discharge under atmospheric pressure, thereby aiding improvements in the design of the discharge system, setting the appropriate working time, and controlling the operating conditions. A 3D model is presented, which includes the physical processes of electromagnetic wave propagation, electron transport, heavy species transport, gas flow, and heat transfer. The results can be obtained by means of the fluid approximation. The maxima of the electron density and gas temperature are 4.96??10{sup 18} m{sup ?3} and 2514.8?K, respectively, and the gas pressure remains almost unchanged for typical operating conditions with a gas flow rate of 20 l/min, microwave power of 1000 W, and initial temperature of 473?K. In addition, the conditions (microwave power, gas flow rate, and initial temperature) of discharge are varied to obtain deeper information about the electron density and gas temperature. The results of our numerical study are valid and clearly describe both the physical process and effects of the conditions of microwave-excited argon discharge.

  17. Numerical study of Kelvin-Helmholtz instability by the point vortex method

    SciTech Connect (OSTI)

    Krasny, R.

    1983-12-01T23:59:59.000Z

    Rosenhead's classical point vortex numerical method for studying the evolution of a vortex sheet from analytic initial data (Kelvin-Helmholtz instability) is examined using the discrete Fourier analysis techniques of Sulem, Sulem and Frisch. One cause for the chaotic motion previously observed in computations using a large number of vortices is that short wavelength perturbations are introduced spuriously by finite precision arithmetic and become amplified by the model's dynamics. Methods for controlling this source of error are given and the results confirm the formation of a singularity in a finite time which was previously found by Moore and Meiron, Baker and Orszag using different techniques of analysis. A cusp forms in the vortex sheet strength at the critical time, explaining the onset of erratic particle motion in applications of the numerical methods of Van de Vooren and Fink and Soh to this problem. Unlike those methods, the point vortex approximation remains consistent at the critical time and we present the results of a long time calculation. The singularity is interpreted physically as a discontinuity in the strain rate along the vortex sheet and also as the start of roll up on a small scale. We numerically study some aspects of the dependence of the solution on the initial condition and find agreement with Moore's asymptotic relation between the initial amplitude and the critical time. For large initial amplitudes, two cusps form in the sheet strength, corresponding to double roll up. We explain why the Poincare recurrenc theorem does not imply that the sheet will eventually unroll. Our results suggest that beyond the critical time, the vortex sheet becomes a spiral with infinite arclength although we have doubts about the approximation's accuracy in that regime. 36 references, 30 figures, 3 tables.

  18. Seismic imaging of hydraullically-stimulated fractures: A numerical study of the effect of the source mechanism

    E-Print Network [OSTI]

    Shabelansky, Andrey Hanan

    2012-01-01T23:59:59.000Z

    We present a numerical study of seismic imaging of hydraulically stimulated fractures using a single source from an adjacent fracturing-process. The source is either a point force generated from the perforation of the ...

  19. A numerical study of steady-state vortex configurations and vortex pinning in type-II superconductors

    E-Print Network [OSTI]

    Kim, Sangbum

    2006-04-12T23:59:59.000Z

    In part I, a numerical study of the mixed states in a mesoscopic type-II superconducting cylinder is described. Steady-state configurations and transient behavior of the magnetic vortices for various values of the applied magnetic field H...

  20. A numerical study of steady-state vortex configurations and vortex pinning in type-II superconductors

    E-Print Network [OSTI]

    Kim, Sangbum

    2006-04-12T23:59:59.000Z

    In part I, a numerical study of the mixed states in a mesoscopic type-II superconducting cylinder is described. Steady-state configurations and transient behavior of the magnetic vortices for various values of the applied ...

  1. Numerical study on transient heat transfer under soil with plastic mulch in agriculture applications using a nonlinear finite element model

    E-Print Network [OSTI]

    De Castro, Carlos Armando

    2011-01-01T23:59:59.000Z

    In this paper is developed a simple mathematical model of transient heat transfer under soil with plastic mulch in order to determine with numerical studies the influence of different plastic mulches on the soil temperature and the evolutions of temperatures at different depths with time. The governing differential equations are solved by a Galerkin Finite Element Model, taking into account the nonlinearities due to radiative heat exchange between the soil surface, the plastic mulch and the atmosphere. The model was validated experimentally giving good approximation of the model to the measured data. Simulations were run with the validated model in order to determine the optimal combination of mulch optical properties to maximize the soil temperature with a Taguchi's analysis, proving that the material most used nowadays in Colombia is not the optimal and giving quantitative results of the properties the optimal mulch must possess.

  2. Numerical simulations of the transport and diffusion during the 1991 Winter Validation Study along the Front Range in Colorado

    SciTech Connect (OSTI)

    Fast, J.D.; O'Steen, B.L.

    1992-01-01T23:59:59.000Z

    An important aspect of the US Department of Energy's Atmospheric Studies in Complex Terrain (ASCOT) program is the development and evaluation of numerical models that predict transport and diffusion of pollutants in complex terrain. Operational mesoscale modeling of the transport of pollutants in complex terrain will become increasingly practical as computational costs decrease and additional data from high-resolution remote sensing instrumentation networks become available during the 1990s. Four-dimensional data assimilation (4DDA) techniques are receiving a great deal of attention recently not only to improve the initial conditions of mesoscale forecast models, but to create high-quality four-dimensional mesoscale analysis fields that can be used as input to air-quality models. In this study, a four-dimensional data assimilation technique based on Newtonian relaxation is incorporated into the Colorado State University (CSU) Regional Atmospheric Modeling System (RAMS) and evaluated using data taken from one experiment of the 1991 ASCOT field study along the front range of the Rockies in Colorado. The main objective of this study is to compare the observed surface concentrations with those predicted by a Lagrangian particle dispersion model and to demonstrate the effect of data assimilation on the simulated plume. In contrast to pervious studies in which the smallest horizontal grid spacing was 10 km (Stauffer and Seaman, 1991) and 8 km (Yamada and Hermi, 1991), data assimilation is applied in this study to domains with a horizontal grid spacing as small as 1 km.

  3. Numerical simulations of the transport and diffusion during the 1991 Winter Validation Study along the Front Range in Colorado

    SciTech Connect (OSTI)

    Fast, J.D.; O`Steen, B.L.

    1992-11-01T23:59:59.000Z

    An important aspect of the US Department of Energy`s Atmospheric Studies in Complex Terrain (ASCOT) program is the development and evaluation of numerical models that predict transport and diffusion of pollutants in complex terrain. Operational mesoscale modeling of the transport of pollutants in complex terrain will become increasingly practical as computational costs decrease and additional data from high-resolution remote sensing instrumentation networks become available during the 1990s. Four-dimensional data assimilation (4DDA) techniques are receiving a great deal of attention recently not only to improve the initial conditions of mesoscale forecast models, but to create high-quality four-dimensional mesoscale analysis fields that can be used as input to air-quality models. In this study, a four-dimensional data assimilation technique based on Newtonian relaxation is incorporated into the Colorado State University (CSU) Regional Atmospheric Modeling System (RAMS) and evaluated using data taken from one experiment of the 1991 ASCOT field study along the front range of the Rockies in Colorado. The main objective of this study is to compare the observed surface concentrations with those predicted by a Lagrangian particle dispersion model and to demonstrate the effect of data assimilation on the simulated plume. In contrast to pervious studies in which the smallest horizontal grid spacing was 10 km (Stauffer and Seaman, 1991) and 8 km (Yamada and Hermi, 1991), data assimilation is applied in this study to domains with a horizontal grid spacing as small as 1 km.

  4. Numerical Study of a Propagating Non-Thermal Microwave Feature in a Solar Flare Loop

    E-Print Network [OSTI]

    T. Minoshima; T. Yokoyama

    2008-06-24T23:59:59.000Z

    We analytically and numerically study the motion of electrons along a magnetic loop, to compare with the observation of the propagating feature of the non-thermal microwave source in the 1999 August 28 solar flare reported by Yokoyama et al. (2002). We model the electron motion with the Fokker-Planck equation and calculate the spatial distribution of the gyrosynchrotron radiation. We find that the microwave propagating feature does not correspond to the motion of electrons with a specific initial pitch angle. This apparent propagating feature is a consequence of the motion of an ensemble of electrons with different initial pitch angles, which have different time and position to produce strong radiation in the loop. We conclude that the non-thermal electrons in the 1999 August 28 flare were isotropically accelerated and then are injected into the loop.

  5. Low level jet development during a numerically simulated return flow event

    E-Print Network [OSTI]

    Igau, Richard Charles

    1994-01-01T23:59:59.000Z

    of the obstacle. This simulation shows that the structure of the lower tropospheric air flow during a period of return flow is complex. When mid-level westerlies are weak, mesoscale processes govern the development of low level jets. As the westerly winds increase...

  6. Development of Numerical Simulation Capabilities for In Situ Heating of Oil

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign: Potential Application toDevelopingandDevelopment ofNovel CO

  7. The MHD Kelvin-Helmholtz instability a two-dimensional numerical study

    E-Print Network [OSTI]

    Frank, A I; Ryu, D; Gaalaas, J B; Frank, Adam; Ryu, Dongsu; Gaalaas, Joseph B

    1995-01-01T23:59:59.000Z

    Using a new numerical code we have carried out two-dimensional simulations of the nonlinear evolution of unstable sheared magnetohydrodynamic flows. We considered two cases: a strong magnetic field (Alfven Mach number, M_a = 2.5) and a weak field (M_a =5). Each flow rapidly evolves until it reaches a nearly steady condition, which is fundamentally different from the analogous gasdynamic state. Both MHD flows relax to a stable, laminar flow on timescales less than or of the order of 15 linear growth times, measured from saturation of the instability. That timescale is several orders of magnitude less than the nominal dissipation time for these simulated flows, so this condition represents an quasi-steady relaxed state. The strong magnetic field case reaches saturation as magnetic tension in the displaced flow boundary becomes sufficient to stabilize it. That flow then relaxes in a straightforward way to the steady, laminar flow condition. The weak magnetic field case, on the other hand, begins development of t...

  8. Numerical solutions of the aerosol general dynamic equation for nuclear reactor safety studies

    SciTech Connect (OSTI)

    Park, J.W.

    1988-01-01T23:59:59.000Z

    Methods and approximations inherent in modeling of aerosol dynamics and evolution for nuclear reactor source term estimation have been investigated. Several aerosol evolution problems are considered to assess numerical methods of solving the aerosol dynamic equation. A new condensational growth model is constructed by generalizing Mason's formula to arbitrary particle sizes, and arbitrary accommodation of the condensing vapor and background gas at particle surface. Analytical solution is developed for the aerosol growth equation employing the new condensation model. The space-dependent aerosol dynamic equation is solved to assess implications of spatial homogenization of aerosol distributions. The results of our findings are as follows. The sectional method solving the aerosol dynamic equation is quite efficient in modeling of coagulation problems, but should be improved for simulation of strong condensation problems. The J-space transform method is accurate in modeling of condensation problems, but is very slow. For the situation considered, the new condensation model predicts slower aerosol growth than the corresponding isothermal model as well as Mason's model, the effect of partial accommodation is considerable on the particle evolution, and the effect of the energy accommodation coefficient is more pronounced than that of the mass accommodation coefficient. For the initial conditions considered, the space-dependent aerosol dynamics leads to results that are substantially different from those based on the spatially homogeneous aerosol dynamic equation.

  9. A numerical study of heat and momentum transfer over a bank of flat tubes

    E-Print Network [OSTI]

    Bahaidarah, Haitham M. S.

    2005-11-01T23:59:59.000Z

    ), Prandtl number (Pr), length ratio (L/Da), and height ratio (H/Da), on the pressure drop and heat transfer were studied. A finite volume based FORTRAN code was developed to solve the governing equations. The scalar and velocity variables were stored...

  10. Numerical study of the direct pressure effect of acoustic waves in planar premixed flames

    SciTech Connect (OSTI)

    Schmidt, H. [BTU Cottbus, Siemens-Halske-Ring 14, D-03046 Cottbus (Germany); Jimenez, C. [Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, Avenida Complutense, 22, 28040 Madrid (Spain)

    2010-08-15T23:59:59.000Z

    Recently the unsteady response of 1-D premixed flames to acoustic pressure waves for the range of frequencies below and above the inverse of the flame transit time was investigated experimentally using OH chemiluminescence Wangher (2008). They compared the frequency dependence of the measured response to the prediction of an analytical model proposed by Clavin et al. (1990), derived from the standard flame model (one-step Arrhenius kinetics) and to a similar model proposed by McIntosh (1991). Discrepancies between the experimental results and the model led to the conclusion that the standard model does not provide an adequate description of the unsteady response of real flames and that it is necessary to investigate more realistic chemical models. Here we follow exactly this suggestion and perform numerical studies of the response of lean methane flames using different reaction mechanisms. We find that the global flame response obtained with both detailed chemistry (GRI3.0) and a reduced multi-step model by Peters (1996) lies slightly above the predictions of the analytical model, but is close to experimental results. We additionally used an irreversible one-step Arrhenius reaction model and show the effect of the pressure dependence of the global reaction rate in the flame response. Our results suggest first that the current models have to be extended to capture the amplitude and phase results of the detailed mechanisms, and second that the correlation between the heat release and the measured OH* chemiluminescence should be studied deeper. (author)

  11. AFCI Safeguards Enhancement Study: Technology Development Roadmap

    SciTech Connect (OSTI)

    Smith, Leon E.; Dougan, A.; Tobin, Stephen; Cipiti, B.; Ehinger, Michael H.; Bakel, A. J.; Bean, Robert; Grate, Jay W.; Santi, P.; Bryan, Steven; Kinlaw, M. T.; Schwantes, Jon M.; Burr, Tom; Lehn, Scott A.; Tolk, K.; Chichester, David; Menlove, H.; Vo, D.; Duckworth, Douglas C.; Merkle, P.; Wang, T. F.; Duran, F.; Nakae, L.; Warren, Glen A.; Friedrich, S.; Rabin, M.

    2008-12-31T23:59:59.000Z

    The Advanced Fuel Cycle Initiative (AFCI) Safeguards Campaign aims to develop safeguards technologies and processes that will significantly reduce the risk of proliferation in the U.S. nuclear fuel cycle of tomorrow. The Safeguards Enhancement Study was chartered with identifying promising research and development (R&D) directions over timescales both near-term and long-term, and under safeguards oversight both domestic and international. This technology development roadmap documents recognized gaps and needs in the safeguarding of nuclear fuel cycles, and outlines corresponding performance targets for each of those needs. Drawing on the collective expertise of technologists and user-representatives, a list of over 30 technologies that have the potential to meet those needs was developed, along with brief summaries of each candidate technology. Each summary describes the potential impact of that technology, key research questions to be addressed, and prospective development milestones that could lead to a definitive viability or performance assessment. Important programmatic linkages between U.S. agencies and offices are also described, reflecting the emergence of several safeguards R&D programs in the U.S. and the reinvigoration of nuclear fuel cycles across the globe.

  12. A Fundamental Study of Convective Mixing of CO2 in Heterogeneous Geologic Media using Surrogate Fluids and Numerical Modeling

    E-Print Network [OSTI]

    of formation heterogeneity on convective mixing. Finite volume based numerical code was developed to capture of Canadian Petroleum Technology, 44(10). - Neufeld, J. A., Hesse M. A., Riaz, A., Hallworth M. A., Tchelepi, H. A., and Huppert H. E., 2010, Convective dissolution of carbon dioxide in saline aquifers, Geophys

  13. Numerical study of transition to supersonic flows in the edge plasma

    SciTech Connect (OSTI)

    Goswami, Rajiv, E-mail: rajiv@ipr.res.in; Artaud, Jean-Franois; Imbeaux, Frdric [CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France); Kaw, Predhiman [Institute for Plasma Research, Bhat, Gandhinagar382428 (India)

    2014-07-15T23:59:59.000Z

    The plasma scrape-off layer (SOL) in a tokamak is characterized by ion flow down a long narrow flux tube terminating on a solid surface. The ion flow velocity along a magnetic field line can be equal to or greater than sonic at the entrance of a Debye sheath or upstream in the presheath. This paper presents a numerical study of the transition between subsonic and supersonics flows. A quasineutral one-dimensional (1D) fluid code has been used for modeling of plasma transport in the SOL along magnetic field lines, both in steady state and under transient conditions. The model uses coupled equations for continuity, momentum, and energy balance with ionization, radiation, charge exchange, and recombination processes. The recycled neutrals are described in the diffusion approximation. Standard Bohm sheath criterion is used as boundary conditions at the material surface. Three conditions conducive for the generation of supersonic flows in SOL plasmas have been explored. It is found that in steady state high (attached) and low (detached) divertor temperatures cases, the role of particle, momentum, and energy loss is critical. For attached case, the appearance of shock waves in the divertor region if the incoming plasma flow is supersonic and its effect on impurity retention is presented. In the third case, plasma expansion along the magnetic field can yield time-dependent supersonic solutions in the quasineutral rarefaction wave. Such situations can arise in the parallel transport of intermittent structures such as blobs and edge localized mode filaments along field lines.

  14. Numerical and simulation study of terahertz radiation generation by laser pulses propagating in the extraordinary mode in magnetized plasma

    SciTech Connect (OSTI)

    Jha, Pallavi; Kumar Verma, Nirmal [Department of Physics, University of Lucknow, Lucknow-226007 (India)

    2014-06-15T23:59:59.000Z

    A one-dimensional numerical model for studying terahertz radiation generation by intense laser pulses propagating, in the extraordinary mode, through magnetized plasma has been presented. The direction of the static external magnetic field is perpendicular to the polarization as well as propagation direction of the laser pulse. A transverse electromagnetic wave with frequency in the terahertz range is generated due to the presence of the magnetic field. Further, two-dimensional simulations using XOOPIC code show that the THz fields generated in plasma are transmitted into vacuum. The fields obtained via simulation study are found to be compatible with those obtained from the numerical model.

  15. Seismic scattering attributes to estimate reservoir fracture density : a numerical modeling study

    E-Print Network [OSTI]

    Pearce, Frederick D. (Frederick Douglas), 1978-

    2003-01-01T23:59:59.000Z

    We use a 3-D finite difference numerical model to generate synthetic seismograms from a simple fractured reservoir containing evenly-spaced, discrete, vertical fracture zones. The fracture zones are represented using a ...

  16. Seismic Scattering Attributes to Estimate Reservoir Fracture Density: A Numerical Modeling Study

    E-Print Network [OSTI]

    Pearce, Frederick Douglas

    We use a 3-D finite difference numerical model to generate synthetic seismograms from a simple fractured reservoir containing evenly-spaced, discrete, vertical fracture zones. The fracture zones are represented using a ...

  17. Advanced Cell Development and Degradation Studies

    SciTech Connect (OSTI)

    J. E. O'Brien; C. M. Stoots; J. S. Herring; R. C. O'Brien; K. G. Condie; M. Sohal; G. K. Housley; J. J. Hartvigsen; D. Larsen; G. Tao; B. Yildiz; V. Sharma; P. Singh; N. Petigny; T. L. Cable

    2010-09-01T23:59:59.000Z

    The Idaho National Laboratory (INL) has been researching the application of solid-oxide electrolysis cells for large-scale hydrogen production from steam over a temperature range of 800 to 900C. From 2003 2009, this work was sponsored by the DOE Nuclear Hydrogen Initiative (NHI). Starting in 2010, the HTE research program has been sponsored by the Next Generation Nuclear Plant (NGNP) program. HTSE research priorities in FY10 are centered on understanding and reducing cell and stack performance degradation to an acceptable level to advance the technology readiness level of HTSE and to justify further large-scale demonstration activities. This report provides a summary of our FY10 experimental program, which has been focused on advanced cell and stack development and degradation studies. Advanced cell and stack development activities are under way at five technology partners: MSRI, Versa Power, Ceramatec, NASA Glenn, and St. Gobain. Performance evaluation of the advanced technology cells and stacks has been performed by the technology partners, by MIT and the University of Connecticut and at the INL HTE Laboratory. Summaries of these development activities and test results are presented.

  18. DOE Zero Energy Ready Home Case Study: Weiss Building & Development...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    DOE Zero Energy Ready Home Case Study: Weiss Building & Development LLC., Custom Home, Downers Grove, IL DOE Zero Energy Ready Home Case Study: Weiss Building & Development LLC.,...

  19. Numerical study of the effect of oxygenated blending compounds on soot formation in shock tubes

    SciTech Connect (OSTI)

    Boehm, H. [Physikalische Chemie I, Universitaet Bielefeld (Germany); Braun-Unkhoff, M. [Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Stuttgart (Germany)

    2008-04-15T23:59:59.000Z

    This numerical study deals with the influence of blends on the amount of soot formed in shock tubes, which were simulated by assuming a homogeneous plug flow reactor model. For this purpose, first, the reaction model used here was validated against experimental results previously obtained in the literature. Then, the soot volume fractions of various mixtures of methyl tert-butyl ether (MTBE)-benzene, isobutene-benzene, methanol-benzene, and ethanol-benzene diluted in argon were simulated and compared to the results of benzene-argon pyrolysis at 1721 K and 5.4 MPa. For MTBE, isobutene, methanol, and ethanol, small amounts of additives to benzene-argon mixtures promoted soot formation, for the shock tube model assumed, while higher concentrations of these additives led to smaller soot volume fractions in comparison to pure benzene-argon pyrolysis. The most significant soot promotion effect was found for the additives MTBE and isobutene. The channel for MTBE decomposition producing isobutene and methanol is very effective at temperatures beyond 1200 K. Thus, both MTBE-benzene and isobutene-benzene mixtures diluted in argon showed rather similar behavior in regard to soot formation. Special emphasis was directed toward the causes for the concentration-dependent influence of the blends on the amount of soot formed. Aromatic hydrocarbons and acetylene were identified as key gas-phase species that determine the trends in the formation of soot of various mixtures. From reaction flux analysis for phenanthrene, it was deduced that the combinative routes including phenyl species play a major role in forming PAHs, especially at early reaction times. It is found that the additives play an important role in providing material to grow side chains, such as by reaction channels including phenylacetylene or benzyl, which are confirmed to form aromatic hydrocarbons and thus to influence the amount of soot formed, particularly when the concentrations of the blends are increased. (author)

  20. Experimental and Numerical Study of Spar Buoy-magnet/spring Oscillators Used as Wave Energy Annette R. Grilli

    E-Print Network [OSTI]

    Grilli, Stphan T.

    Experimental and Numerical Study of Spar Buoy-magnet/spring Oscillators Used as Wave Energy.g., latching) of the SSLG, in order to further improve power generation. KEYWORDS : Wave energy systems networks), based on captur- ing renewable wave energy. To do so, we design and optimize a new type

  1. Abstract--Numerous studies have shown that households' consumption is an important part of the total energy consumed

    E-Print Network [OSTI]

    Beigl, Michael

    consumption and for about 50% of the total electricity consumption [1]. Therefore it is important to explore one of them. The interviewees preferred receiving electricity consumption feedback from a bill, a web1 Abstract--Numerous studies have shown that households' consumption is an important part

  2. American Institute of Aeronautics and Astronautics A Numerical Study of Vortex-Dominated Flow around an Oscillating

    E-Print Network [OSTI]

    Hu, Hui

    flapping motion is due to the reverse von Karman vortex street. Recently, Bohl and Koochesfahani1 haveAmerican Institute of Aeronautics and Astronautics 1 A Numerical Study of Vortex-Dominated Flow at the Reynolds (Re) number of 12600. The effects of the reduced frequency and Strouhal number on the wake vortex

  3. An experimental and numerical study of surface tension-driven melt flow R.A. Parsons a,, F. Nimmo a

    E-Print Network [OSTI]

    Nimmo, Francis

    An experimental and numerical study of surface tension-driven melt flow R.A. Parsons a,, F. Nimmo 2007 Abstract To determine the role of surface tension-driven melt migration in planetary bodies, we, surface tension causes the melt to relax back to a homogeneous distribution. Samples composed of 76 vol

  4. A numerical study of geometry dependent errors in velocity, temperature, and density measurements from single grid planar retarding potential analyzers

    SciTech Connect (OSTI)

    Davidson, R. L.; Earle, G. D.; Heelis, R. A. [William B. Hanson Center for Space Sciences, University of Texas at Dallas, 800 W. Campbell Road, WT15, Richardson, Texas 75080 (United States); Klenzing, J. H. [Space Weather Laboratory/Code 674, Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)

    2010-08-15T23:59:59.000Z

    Planar retarding potential analyzers (RPAs) have been utilized numerous times on high profile missions such as the Communications/Navigation Outage Forecast System and the Defense Meteorological Satellite Program to measure plasma composition, temperature, density, and the velocity component perpendicular to the plane of the instrument aperture. These instruments use biased grids to approximate ideal biased planes. These grids introduce perturbations in the electric potential distribution inside the instrument and when unaccounted for cause errors in the measured plasma parameters. Traditionally, the grids utilized in RPAs have been made of fine wires woven into a mesh. Previous studies on the errors caused by grids in RPAs have approximated woven grids with a truly flat grid. Using a commercial ion optics software package, errors in inferred parameters caused by both woven and flat grids are examined. A flat grid geometry shows the smallest temperature and density errors, while the double thick flat grid displays minimal errors for velocities over the temperature and velocity range used. Wire thickness along the dominant flow direction is found to be a critical design parameter in regard to errors in all three inferred plasma parameters. The results shown for each case provide valuable design guidelines for future RPA development.

  5. Numerical study of the conductivity of graphene monolayer within the effective field theory approach

    E-Print Network [OSTI]

    P. V. Buividovich; E. V. Luschevskaya; O. V. Pavlovsky; M. I. Polikarpov; M. V. Ulybyshev

    2012-06-29T23:59:59.000Z

    We report on the direct numerical measurements of the conductivity of graphene monolayer. Our numerical simulations are performed in the effective lattice field theory with noncompact 3 + 1-dimensional Abelian lattice gauge fields and 2 + 1-dimensional staggered lattice fermions. The conductivity is obtained from the Green-Kubo relations using the Maximum Entropy Method. We find that in a phase with spontaneously broken sublattice symmetry the conductivity rapidly decreases. For the largest value of the coupling constant used in our simulations g = 4.5, the DC conductivity is less than the DC conductivity in the weak-coupling phase (at g < 3.5) by at least three orders of magnitude.

  6. Numerical and Experimental Study of Mixing Processes Associated with Hydrogen and High Hydrogen Content Fuels

    SciTech Connect (OSTI)

    McDonell, Vincent; Hill, Scott; Akbari, Amin; McDonell, Vincent

    2011-09-30T23:59:59.000Z

    As simulation capability improves exponentially with increasingly more cost effective CPUs and hardware, it can be used ?routinely? for engineering applications. Many commercial products are available and they are marketed as increasingly powerful and easy to use. The question remains as to the overall accuracy of results obtained. To support the validation of the CFD, a hierarchical experiment was established in which the type of fuel injection (radial, axial) as well as level of swirl (non-swirling, swirling) could be systematically varied. The effort was limited to time efficient approaches (i.e., generally RANS approaches) although limited assessment of time resolved methods (i.e., unsteady RANS and LES) were considered. Careful measurements of the flowfield velocity and fuel concentration were made using both intrusive and non-intrusive methods. This database was then used as the basis for the assessment of the CFD approach. The numerical studies were carried out with a statistically based matrix. As a result, the effect of turbulence model, fuel type, axial plane, turbulent Schmidt number, and injection type could be studied using analysis of variance. The results for the non-swirling cases could be analyzed as planned, and demonstrate that turbulence model selection, turbulence Schmidt number, and the type of injection will strongly influence the agreement with measured values. Interestingly, the type of fuel used (either hydrogen or methane) has no influence on the accuracy of the simulations. For axial injection, the selection of proper turbulence Schmidt number is important, whereas for radial injection, the results are relatively insensitive to this parameter. In general, it was found that the nature of the flowfield influences the performance of the predictions. This result implies that it is difficult to establish a priori the ?best? simulation approach to use. However, the insights from the relative orientation of the jet and flow do offer some guidance for which approach to take. Overall, the results underscore the importance of model ?anchoring? (i.e., ?tuning? the model to provide ?reasonable? agreement with a well characterized geometry/flow). Finally, the results obtained have been carefully compiled into a standalone database following a standard format that is contained in an Appendix. This database is thus available for use by others for CFD modeling evaluations.

  7. Journal of Fluids and Structures 24 (2008) 250269 Numerical and experimental study of expiratory flow

    E-Print Network [OSTI]

    Van Hirtum, Annemie

    2008-01-01T23:59:59.000Z

    , the pharynx, the mouth and the larynx (Fig. 1), is the most external part of the respiratory system. Modelling deformations has been chosen to compute the mechanical behaviour of the tongue. The main features of the flow and Depollier, 1995; Huang, 1995; Balint and Lucey, 2005), numerical simulations of the respiratory fluid flow

  8. Experimental and Numerical Study of Jet Mixing from a Shock-Containing Nozzle

    E-Print Network [OSTI]

    Papamoschou, Dimitri

    and numerically. The investigation encompasses exit-to-throat area ratios (Ae=At) from 1.0 to 1.8 and nozzle pressure ratios from 1.2 to 1.8. Experiments were conducted in a variable-geometry nozzle facility area d = jet thickness H = nozzle height J = momentum flux M = Mach number m = mass flux of jet plume p

  9. Analytical and numerical methods for processing Hopkinson Bar Loaded Bending test on concrete: a comparative study

    E-Print Network [OSTI]

    Boyer, Edmond

    Analytical and numerical methods for processing Hopkinson Bar Loaded Bending test on concrete on dynamic characteristics of concrete. Various techniques have been used to test concretes at high strain for concrete structures subjected to dynamic loading such as explosions or im- pacts require information

  10. Numerical Studies of Collective Phenomena in Two-Dimensional Electron and Cold Atom Systems

    SciTech Connect (OSTI)

    Rezayi, Edward

    2013-07-25T23:59:59.000Z

    Numerical calculations were carried out to investigate a number of outstanding questions in both two-dimensional electron and cold atom systems. These projects aimed to increase our understanding of the properties of and prospects for non-Abelian states in quantum Hall matter.

  11. LABORATORY-NUMERICAL MODEL COMPARISONS OF CANYON FLOWS: A PARAMETER STUDY.

    E-Print Network [OSTI]

    , but the enhanced viscosities needed to obtain numerical stability give boundary layers that are too wide along length scales, one the fluid depth and another a more narrow boundary-layer-like thickness [O(RoBu-1 is the interaction of an oscillatory, along-slope background current with an isolated canyon incised in an otherwise

  12. Numerical study of viscoelastic mixtures through a Cahn-Hilliard Franck Boyer1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -time numerical simulations. Several significant tests (channel under shear, filling of tanks, breakup of jets. In this model, the sharp interface is replaced by a narrow transition layer across which the fluids may mix to describe the concentration of one of the fluids in the mixture. The resulting system of equations couples

  13. Numerical studies of emittance exchange in 2-D charged-particle beams

    SciTech Connect (OSTI)

    Guy, F.W.

    1986-01-01T23:59:59.000Z

    We describe results obtained from a two-dimensional particle-following computer code that simulates a continuous, nonrelativistic, elliptical charged-particle beam with linear continuous focusing. Emittances and focusing strengths can be different in the two transverse directions. The results can be applied, for example, for a quadrupole transport system in a smooth approximation to a real beam with unequal emittances in the two planes. The code was used to study emittance changes caused by kinetic-energy exchange between transverse directions and by shifts in charge distributions. Simulation results for space-charge-dominated beams agree well with analytic formulas. From simulation results, an empirical formula was developed for a ''partition parameter'' (the ratio of kinetic energies in the two directions) as a function of initial conditions and beamline length. Quantitative emittance changes for each transverse direction can be predicted by using this parameter. Simulation results also agree with Hofmann's generalized differential equation relating emittance and field energy.

  14. Numerical study of ion acoustic shock waves in dense quantum plasma

    SciTech Connect (OSTI)

    Hanif, M.; Mirza, Arshad M. [Theoretical Plasma Physics Group, Department of Physics, Quaid-e-Azam University, Islamabad 45320 (Pakistan)] [Theoretical Plasma Physics Group, Department of Physics, Quaid-e-Azam University, Islamabad 45320 (Pakistan); Ali, S.; Mukhtar, Q., E-mail: qaisarm@ncp.edu.pk [National Center for Physics, Quaid-e-Azam University Campus, Shahdra Valley Road, Islamabad 44000 (Pakistan)

    2014-03-15T23:59:59.000Z

    Two fluid quantum hydrodynamic equations are solved numerically to investigate the propagation characteristics of ion acoustic shock waves in an unmagnetized dense quantum plasma, whose constituents are the electrons and ions. For this purpose, we employ the standard finite difference Lax Wendroff and relaxation methods, to examine the quantum effects on the profiles of shock potential, the electron/ion number densities, and velocity even for quantum parameter at H?=?2. The effects of the latter vanish in a weakly non-linear limit while obeying the KdV theory. It is shown that the evolution of the wave depends sensitively on the plasma density and the quantum parameter. Numerical results reveal that the kinks or oscillations are pronounced for large values of quantum parameter, especially at H?=?2. Our results should be important to understand the shock wave excitations in dense quantum plasmas, white dwarfs, neutron stars, etc.

  15. Analytical and Numerical Study of Photocurrent Transients in Organic Polymer Solar Cells

    E-Print Network [OSTI]

    de Falco, Carlo; Verri, Maurizio; 10.1016/j.cma.2010.01.018

    2012-01-01T23:59:59.000Z

    This article is an attempt to provide a self consistent picture, including existence analysis and numerical solution algorithms, of the mathematical problems arising from modeling photocurrent transients in Organic-polymer Solar Cells (OSCs). The mathematical model for OSCs consists of a system of nonlinear diffusion-reaction partial differential equations (PDEs) with electrostatic convection, coupled to a kinetic ordinary differential equation (ODE). We propose a suitable reformulation of the model that allows us to prove the existence of a solution in both stationary and transient conditions and to better highlight the role of exciton dynamics in determining the device turn-on time. For the numerical treatment of the problem, we carry out a temporal semi-discretization using an implicit adaptive method, and the resulting sequence of differential subproblems is linearized using the Newton-Raphson method with inexact evaluation of the Jacobian. Then, we use exponentially fitted finite elements for the spatial...

  16. Numerical study of an electrostatic plasma sheath containing two species of charged dust particles

    SciTech Connect (OSTI)

    Foroutan, G. [Physics Department, Faculty of Science, Sahand University of Technology, 51335-1996 Tabriz (Iran, Islamic Republic of); Akhoundi, A. [Nanostructure Material Research Center, Sahand University of Technology, 51335-1996 Tabriz (Iran, Islamic Republic of)

    2012-10-01T23:59:59.000Z

    A multi-fluid model is used to study the dynamics of a dusty plasma sheath consists of electrons, ions, and two species of charged dust particles, i.e., nano-size and micron-size particles. It is found that, when the sheath is dominated by the nano-size dust grains, spatially periodic fluctuations are developed in the profiles of the sheath potential, and the number density and velocity of the plasma and dust particles. Due to inertial effects, the fluctuations in the parameters of the micron-size grains are much lower than those of the other parameters. The competition between the electric and ion drag forces plays the primary role in development of the fluctuations. The spatial period of the fluctuations is approximately a few Debye lengths and their amplitude depends on the plasma and dust parameters. The fluctuations are reduced by the increase in the radius, mass density, and Mach number of the nano-size particles, as well as the density and Mach number of the ions. But, they are enhanced by the increase in the plasma number density and the electron temperature. The sheath thickness demonstrates a non-monotonic behavior against variation of the nanoparticle parameters, i.e., it first decreases quickly, shows a minimum, and then increases. However, the sheath width always decreases with the plasma number density and ion Mach number, while grows linearly with the electron temperature.

  17. Stress-dependent permeability of fractured rock masses: A numerical study

    SciTech Connect (OSTI)

    Min, Ki-Bok; Rutqvist, J.; Tsang, Chin-Fu; Jing, Lanru

    2004-04-30T23:59:59.000Z

    We investigate the stress-dependent permeability issue in fractured rock masses considering the effects of nonlinear normal deformation and shear dilation of fractures using a two-dimensional distinct element method program, UDEC, based on a realistic discrete fracture network realization. A series of ''numerical'' experiments were conducted to calculate changes in the permeability of simulated fractured rock masses under various loading conditions. Numerical experiments were conducted in two ways: (1) increasing the overall stresses with a fixed ratio of horizontal to vertical stresses components; and (2) increasing the differential stresses (i.e., the difference between the horizontal and vertical stresses) while keeping the magnitude of vertical stress constant. These numerical experiments show that the permeability of fractured rocks decreases with increased stress magnitudes when the stress ratio is not large enough to cause shear dilation of fractures, whereas permeability increases with increased stress when the stress ratio is large enough. Permeability changes at low stress levels are more sensitive than at high stress levels due to the nonlinear fracture normal stress-displacement relation. Significant stress-induced channeling is observed as the shear dilation causes the concentration of fluid flow along connected shear fractures. Anisotropy of permeability emerges with the increase of differential stresses, and this anisotropy can become more prominent with the influence of shear dilation and localized flow paths. A set of empirical equations in closed-form, accounting for both normal closure and shear dilation of the fractures, is proposed to model the stress-dependent permeability. These equations prove to be in good agreement with the results obtained from our numerical experiments.

  18. Numerical Study on Behavior of Hydrogen Ice Pellet in Drift Tube

    SciTech Connect (OSTI)

    Yokomine, Takehiko [Interdisciplinary Graduate School of Engineering Sciences, Kyushu University (Japan); Yonemoto, Yukihiro [Hitachi Industries Co. Ltd. (Japan); Ebara, Shinji [Interdisciplinary Graduate School of Engineering Sciences, Kyushu University (Japan); Shimizu, Akihiko [Interdisciplinary Graduate School of Engineering Sciences, Kyushu University (Japan)

    2005-04-15T23:59:59.000Z

    Pellet injection with a bent drift tube is considered as one of the flexible methods to have a variety of fueling locations and injection angles in fusion plasma. Since both pellet mass and velocity greatly affect the plasma properties, mass loss and velocity attenuation of the pellet in the drift tube should be evaluated properly. We focused on the impact of the pellet on the tube wall and numerically estimated the mass loss and the velocity attenuation.

  19. Numerical study of premixed twin edge flames in a counterflow field

    SciTech Connect (OSTI)

    Cho, Seong-Jin; Takita, Kenichi [Department of Aeronautics and Space Engineering, Tohoku University, Aramaki, Sendai 980-8579 (Japan)

    2006-01-01T23:59:59.000Z

    Characteristics of premixed edge flames established in a counterflow field with a stretch-rate gradient were numerically investigated by solving three-dimensional governing equations with detailed chemistry in the general curvilinear coordinates system. Local mole fractions of radicals, such as OH or CH, at the flame edge of a CH{sub 4}/air mixture were found to be larger than those in other parts of the flame. On the other hand, local mole fractions of radicals in the flame edge of a C{sub 3}H{sub 8}/air mixture were smaller than those in other parts. These numerical results agreed well with the experimental results of the present authors. Moreover, it was elucidated that two flame edges of twin counterflow flames did not merge at the edge even in the case of the CH{sub 4}/air mixture. The ratio of the local stretch rate at the flame edge to the extinction stretch rate for planar twin flames with the same equivalence ratio was 0.6 for the CH{sub 4}/air mixture and 0.7 for the C{sub 3}H{sub 8}/air mixture. These numerical results also agreed with results of the past experiments. Moreover, as for relatively low stretch-rate gradients, the stretch-rate gradient had no strong influence on the characteristics of the edge flames.

  20. Numerical and experimental study of the interaction between two marine current turbines

    E-Print Network [OSTI]

    Mycek, Paul; Germain, Grgory; Pinon, Grgory; Rivoalen, Elie

    2013-01-01T23:59:59.000Z

    The understanding of interaction effects between marine energy converters represents the next step in the research process that should eventually lead to the deployment of such devices. Although some a priori considerations have been suggested recently, very few real condition studies have been carried out concerning this issue. Trials were run on 1/30th scale models of three-bladed marine current turbine prototypes in a flume tank. The present work focuses on the case where a turbine is placed at different locations in the wake of a first one. The interaction effects in terms of performance and wake of the second turbine are examined and compared to the results obtained on the case of one single turbine. Besides, a three-dimensional software, based on a vortex method is currently being developed, and will be used in the near future to model more complex layouts. The experimental study shows that the second turbine is deeply affected by the presence of an upstream device and that a compromise between individu...

  1. Migration and Development Research Scoping Study

    E-Print Network [OSTI]

    Boyer, Edmond

    , poverty, inequality and growth....................................................... 3 2.3. Socio the effects of migration and remittances on development indicators such as poverty, health, inequality, income

  2. Study Guide Development-relevant Education

    E-Print Network [OSTI]

    Franssen, Michael

    ............................................................................................ xxxvii 3P250 - Energy and sustainability:.................................................................................................... xxviii 0C205 - Background of sustainable development ......................................................................... xxviii 0C601 - Technology and sustainability

  3. Development of Spatio-Temporal Wavelet Post Processing Techniques for Application to Thermal Hydraulic Experiments and Numerical Simulations

    E-Print Network [OSTI]

    Salpeter, Nathaniel

    2012-07-16T23:59:59.000Z

    -intrusive particle tracking velocimetry (PTV) techniques. The second experiment is of a simulated double ended guillotine break in the prismatic block gas cooled reactor. Numerical simulations of jet flow mixing in the lower plenum of a prismatic block high...

  4. Fractional Euler-Bernoulli beams: theory, numerical study and experimental validation

    E-Print Network [OSTI]

    Wojciech Sumelka; Tomasz Blaszczyk; Christian Liebold

    2015-02-05T23:59:59.000Z

    In this paper the classical Euler-Bernoulli beam (CEBB) theory is reformulated utilising fractional calculus. Such generalisation is called fractional Euler-Bernoulli beams (FEBB) and results in non-local spatial description. The parameters of the model are identified based on AFM experiments concerning bending rigidities of micro-beams made of the polymer SU-8. In experiments both force as well as deflection data were recorded revealing significant size effect with respect to outer dimensions of the specimens. Special attention is also focused on the proper numerical solution of obtained fractional differential equation.

  5. Numerical Study on Crossflow Printed Circuit Heat Exchanger for Advanced Small Modular Reactors

    SciTech Connect (OSTI)

    Yoon, Su-Jong [Idaho National Laboratory (INL), Idaho Falls, ID (United States); Sabharwall, Piyush [Idaho National Laboratory (INL), Idaho Falls, ID (United States); Kim, Eung-Soo [Seoul National Univ., Seoul (Korea, Republic of)

    2014-03-01T23:59:59.000Z

    Various fluids such as water, gases (helium), molten salts (FLiNaK, FLiBe) and liquid metal (sodium) are used as a coolant of advanced small modular reactors (SMRs). The printed circuit heat exchanger (PCHE) has been adopted as the intermediate and/or secondary heat exchanger of SMR systems because this heat exchanger is compact and effective. The size and cost of PCHE can be changed by the coolant type of each SMR. In this study, the crossflow PCHE analysis code for advanced small modular reactor has been developed for the thermal design and cost estimation of the heat exchanger. The analytical solution of single pass, both unmixed fluids crossflow heat exchanger model was employed to calculate a two dimensional temperature profile of a crossflow PCHE. The analytical solution of crossflow heat exchanger was simply implemented by using built in function of the MATLAB program. The effect of fluid property uncertainty on the calculation results was evaluated. In addition, the effect of heat transfer correlations on the calculated temperature profile was analyzed by taking into account possible combinations of primary and secondary coolants in the SMR systems. Size and cost of heat exchanger were evaluated for the given temperature requirement of each SMR.

  6. Numerical simulations of stick percolation: Application to the study of structured magnetorheologial elastomers

    E-Print Network [OSTI]

    J. L. Mietta; R. M. Negri; P. I. Tamborenea

    2014-05-04T23:59:59.000Z

    In this article we explore how structural parameters of composites filled with one-dimensional, electrically conducting elements (such as sticks, needles, chains, or rods) affect the percolation properties of the system. To this end, we perform Monte Carlo simulations of asymmetric two-dimensional stick systems with anisotropic alignments. We compute the percolation probability functions in the direction of preferential orientation of the percolating objects and in the orthogonal direction, as functions of the experimental structural parameters. Among these, we considered the average length of the sticks, the standard deviation of the length distribution, and the standard deviation of the angular distribution. We developed a computer algorithm capable of reproducing and verifying known theoretical results for isotropic networks and which allows us to go beyond and study anisotropic systems of experimental interest. Our research shows that the total electrical anisotropy, considered as a direct consequence of the percolation anisotropy, depends mainly on the standard deviation of the angular distribution and on the average length of the sticks. A conclusion of practical interest is that we find that there is a wide and well-defined range of values for the mentioned parameters for which it is possible to obtain reliable anisotropic percolation under relatively accessible experimental conditions when considering composites formed by dispersions of sticks, oriented in elastomeric matrices.

  7. Analytical and Numerical Study of Photocurrent Transients in Organic Polymer Solar Cells

    E-Print Network [OSTI]

    Carlo de Falco; Riccardo Sacco; Maurizio Verri

    2012-06-27T23:59:59.000Z

    This article is an attempt to provide a self consistent picture, including existence analysis and numerical solution algorithms, of the mathematical problems arising from modeling photocurrent transients in Organic-polymer Solar Cells (OSCs). The mathematical model for OSCs consists of a system of nonlinear diffusion-reaction partial differential equations (PDEs) with electrostatic convection, coupled to a kinetic ordinary differential equation (ODE). We propose a suitable reformulation of the model that allows us to prove the existence of a solution in both stationary and transient conditions and to better highlight the role of exciton dynamics in determining the device turn-on time. For the numerical treatment of the problem, we carry out a temporal semi-discretization using an implicit adaptive method, and the resulting sequence of differential subproblems is linearized using the Newton-Raphson method with inexact evaluation of the Jacobian. Then, we use exponentially fitted finite elements for the spatial discretization, and we carry out a thorough validation of the computational model by extensively investigating the impact of the model parameters on photocurrent transient times.

  8. Numerical and experimental study of the thermal stress of silicon induced by a millisecond laser

    SciTech Connect (OSTI)

    Wang Xi; Qin Yuan; Wang Bin; Zhang Liang; Shen Zhonghua; Lu Jian; Ni Xiaowu

    2011-07-20T23:59:59.000Z

    A spatial axisymmetric finite element model of single-crystal silicon irradiated by a 1064 nm millisecond laser is used to investigate the thermal stress damage induced by a millisecond laser. The transient temperature field and the thermal stress field for 2 ms laser irradiation with a laser fluence of 254 J/cm{sup 2} are obtained. The numerical simulation results indicate that the hoop stresses along the r axis on the front surface are compressive stress within the laser spot and convert to tensile stress outside the laser spot, while the radial stresses along the r axis on the front surface and on the z axis are compressive stress. The temperature of the irradiated center is the highest temperature obtained, yet the stress is not always highest during laser irradiation. At the end of the laser irradiation, the maximal hoop stress is located at r=0.5 mm and the maximal radial stress is located at r=0.76 mm. The temperature measurement experiments are performed by IR pyrometer. The numerical result of the temperature field is consistent with the experimental result. The damage morphologies of silicon under the action of a 254 J/cm{sup 2} laser are inspected by optical microscope. The cracks are observed initiating at r=0.5 mm and extending along the radial direction.

  9. Development of a Two-fluid Drag Law for Clustered Particles using Direct Numerical Simulation and Validation through Experiments

    SciTech Connect (OSTI)

    Gokaltun, Seckin; Munroe, Norman; Subramaniam, Shankar

    2014-12-31T23:59:59.000Z

    This study presents a new drag model, based on the cohesive inter-particle forces, implemented in the MFIX code. This new drag model combines an existing standard model in MFIX with a particle-based drag model based on a switching principle. Switches between the models in the computational domain occur where strong particle-to-particle cohesion potential is detected. Three versions of the new model were obtained by using one standard drag model in each version. Later, performance of each version was compared against available experimental data for a fluidized bed, published in the literature and used extensively by other researchers for validation purposes. In our analysis of the results, we first observed that standard models used in this research were incapable of producing closely matching results. Then, we showed for a simple case that a threshold is needed to be set on the solid volume fraction. This modification was applied to avoid non-physical results for the clustering predictions, when governing equation of the solid granular temperate was solved. Later, we used our hybrid technique and observed the capability of our approach in improving the numerical results significantly; however, improvement of the results depended on the threshold of the cohesive index, which was used in the switching procedure. Our results showed that small values of the threshold for the cohesive index could result in significant reduction of the computational error for all the versions of the proposed drag model. In addition, we redesigned an existing circulating fluidized bed (CFB) test facility in order to create validation cases for clustering regime of Geldart A type particles.

  10. Preliminary Study on Sustainable Low-Carbon Development Towards...

    Open Energy Info (EERE)

    Preliminary Study on Sustainable Low-Carbon Development Towards 2030 in Vietnam Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Preliminary Study on Sustainable...

  11. Experimental and Numerical Study of Ceramic Breeder Pebble Bed Thermal Deformation Behavior

    SciTech Connect (OSTI)

    An Zhiyong; Ying, Alice; Abdou, Mohamed [University of California, Los Angeles (United States)

    2005-05-15T23:59:59.000Z

    Experiments on thermomechanics interactions between clad and pebble beds have been performed with overstoichiometric lithium orthosilicate pebbles (pebble diameters between 0.25 and 0.63 mm) at temperatures of 700-800 deg. C. The experimental results show that the thermal deformation of our pebble bed system is nonlinear and when the operating temperature is higher than 600 deg. C, thermal creep deformation is generated. In this paper, constitutive equations of the elastic and creep deformation are derived from the experimental results. Incorporating the effective constitutive equations in finite element method (FEM), numerical investigations presenting the elastic and plastic deformation characteristics of pebble bed system are comparable to the experimental behaviors. In addition, discrete element method (DEM) is underdevelopment to derive constitutive equations for different pebble beds. The preliminary results of DEM show the stress distribution inside the pebble beds at steady or transient states, which helps us to identify the destructive region in a pebble bed system.

  12. Numerical study on the influence of electron cyclotron current drive on tearing mode

    SciTech Connect (OSTI)

    Chen, Long; Liu, Jinyuan; Mao, Aohua; Sun, Jizhong, E-mail: jsun@dlut.edu.cn [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Duan, Ping [Department of Physics, Dalian Maritime University, Dalian 116026 (China)

    2014-10-15T23:59:59.000Z

    Controlling tearing modes by localized current drive is explored by using numerical simulation with a set of compressible magnetohydrodynamics equations. By examining the effects of different characteristics of driven current, such as density distribution, duration time, and deposition location, it is found that a driven current with larger magnitude and more focused deposition region shows a better suppression effect on the tearing modes. Meanwhile destabilizing effects are also observed when a driven current over a certain magnitude is applied continuously. In comparison with those on the X-point of the magnetic island, the results are better when the current deposition is targeted on the O-point. In addition, the timing control of the current deposition will be also addressed.

  13. A new chemodynamical tool to study the evolution of galaxies in the local Universe: a quick and accurate numerical technique to compute gas cooling rate for any chemical composition

    E-Print Network [OSTI]

    Nicolas Champavert; Herv Wozniak

    2007-03-13T23:59:59.000Z

    We have developed a quick and accurate numerical tool to compute gas cooling whichever its chemical composition.

  14. LARGE-SCALE UNSTEADINESS IN A TWO-DIMENSIONAL DIFFUSER: NUMERICAL STUDY TOWARD ACTIVE SEPARATION CONTROL

    E-Print Network [OSTI]

    Colonius, Tim

    of Technology, Pasadena, California 91125 ABSTRACT We develop a reduced order model for large-scale unsteadiness mass injection can pinch off vortices with a smaller size; accordingly, their convective velocity

  15. Numerical Study on Transverse Friction of a Slender Rod Contacting the Seabed

    E-Print Network [OSTI]

    Lu, Hang

    2012-10-19T23:59:59.000Z

    based upon a Coulomb model originally developed for the simulation of the friction in all dry contact mechanical systems. In applying the Coulomb model, the transverse friction depends on the transverse displacement and/or velocity of a slender rod...

  16. A numerical study of heat and momentum transfer over a bank of flat tubes

    E-Print Network [OSTI]

    Bahaidarah, Haitham M. S.

    2005-11-01T23:59:59.000Z

    is observed to attain a periodically fully developed profile downstream of the fourth module. The strength increases and the size of the recirculation gets larger as the Reynolds number increases. As the height ratio increases, the strength and size...

  17. Process for development of multicenter urodynamic studies

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    in the first 11 cases. Cough Leak Point Pressure (CLLP)in incrementally forceful coughs. Analysis revealed thatCMG and PFS studies. A cough was added at MCC to demonstrate

  18. Deep Chandra observation and numerical studies of the nearest cluster cold front in the sky

    E-Print Network [OSTI]

    Werner, N; Zhuravleva, I; Ichinohe, Y; Simionescu, A; Allen, S W; Markevitch, M; Fabian, A C; Keshet, U; Roediger, E; Ruszkowski, M; Sanders, J S

    2015-01-01T23:59:59.000Z

    We present the results of a very deep (500 ks) Chandra observation, along with tailored numerical simulations, of the nearest, best resolved cluster cold front in the sky, which lies 90 kpc (19 arcmin) to the northwest of M 87. The northern part of the front appears the sharpest, with a width smaller than 2.5 kpc (1.5 Coulomb mean free paths; at 99 per cent confidence). Everywhere along the front, the temperature discontinuity is narrower than 4-8 kpc and the metallicity gradient is narrower than 6 kpc, indicating that diffusion, conduction and mixing are suppressed across the interface. Such transport processes can be naturally suppressed by magnetic fields aligned with the cold front. However, the northwestern part of the cold front is observed to have a nonzero width. The broadening is consistent with the presence of Kelvin-Helmholtz instabilities (KHI) on length scales of a few kpc. Based on comparison with simulations, the presence of KHI would imply that the effective viscosity of the intra-cluster medi...

  19. Numerical study of the mass spectrum in the 2D O(3) sigma model with a theta term

    E-Print Network [OSTI]

    B. Alles; A. Papa

    2007-11-12T23:59:59.000Z

    It has been conjectured that the mass spectrum of the O(3) non-linear sigma model with a theta term in 2 dimensions may possess an excited state, which decays when theta is lowered from pi below a critical value. Since the direct numerical investigation of the model is prevented by a sign problem, we try to infer some information on the mass spectrum at real theta by studying the model at imaginary theta via analytic continuation. A modified Swendsen-Wang cluster algorithm has been introduced to simulate the model with the theta term.

  20. 2002 Fusion Summer Study Development Pathway Subgroup (E 4)

    E-Print Network [OSTI]

    2002 Fusion Summer Study Development Pathway Subgroup (E 4) Final Report July 25, 2002 #12;6. Development Path Scenarios The development path to realize fusion as a practical energy source must include performance, steady-state operation; 4) Development of low-activation materials and fusion technologies

  1. A numerical study on the dimension of an extremely inhomogeneous matter distribution

    E-Print Network [OSTI]

    Cecilia B. M. H. Chirenti

    2005-08-10T23:59:59.000Z

    We have developed an algorithm that numericaly computes the dimension of an extremely inhomogeous matter distribution, given by a discrete hierarchical metric. With our results it is possible to analise how the dimension of the matter density tends to d = 3, as we consider larger samples.

  2. Numerical simulation of the non-isothermal developing flow of a nonlinear viscoelastic fluid in a rectangular channel

    E-Print Network [OSTI]

    Nikoleris, Teo

    1988-01-01T23:59:59.000Z

    Fluid in a Rectangular Channel (December 1988) Teo Nikoleris, B. S. , Reed College Chairman of Advisory Committee: Dr. R. Darby An orthogonal collocation finite element program was used to numerically model the hydrodynamicslly and thermally... in negligible increase of Nw~ ~?. Also, the approach of Chang and Finlayson [6], [7] who applied orthogonal collocation finite elements in conjunction with bicubic Hermitian polynomials to approximate various viscoelastic flow problems, also met with little...

  3. The Milling Assistant, Case-Based Reasoning, and machining strategy: A report on the development of automated numerical control programming systems at New Mexico State University

    SciTech Connect (OSTI)

    Burd, W. [Sandia National Labs., Albuquerque, NM (United States); Culler, D.; Eskridge, T.; Cox, L.; Slater, T. [New Mexico State Univ., Las Cruces, NM (United States)

    1993-08-01T23:59:59.000Z

    The Milling Assistant (MA) programming system demonstrates the automated development of tool paths for Numerical Control (NC) machine tools. By integrating a Case-Based Reasoning decision processor with a commercial CAD/CAM software, intelligent tool path files for milled and point-to-point features can be created. The operational system is capable of reducing the time required to program a variety of parts and improving product quality by collecting and utilizing ``best of practice`` machining strategies.

  4. Numerical Study of Geometry and Rotation Dependence on the Flow in Labyrinth Seals

    E-Print Network [OSTI]

    Yamsani, Vamshi Krishna

    2011-10-21T23:59:59.000Z

    to predict the flow field in the seal. Various clearance-pitch ratios were used to study the effect of clearance on the flow. The aspect ratio, which is defined as the pitch-height ratio was varied to study the influence of the depth of the cavity on the flow...

  5. Numerical study and validation of one swirling flame , Sren K. Kr, Chungen Yin

    E-Print Network [OSTI]

    Berning, Torsten

    Department of Energy Technology Aalborg University, Pontoppidanstrde 101, 9220 Aalborg, Denmark Abstract-7]. The reliable experimental data are used as model database in TNF and reference for modelling studies. Large

  6. Numerical Study of Geometry and Rotation Dependence on the Flow in Labyrinth Seals

    E-Print Network [OSTI]

    Yamsani, Vamshi Krishna

    2011-10-21T23:59:59.000Z

    A computational study was conducted on the flow, both compressible and incompressible, in a labyrinth seal at various geometries and rotation rates. The computations were performed using the commercial software Fluent which solves the k-? model...

  7. Development/Plasticity/Repair A Structural MRI Study of Human Brain Development from

    E-Print Network [OSTI]

    Utah, University of

    Development/Plasticity/Repair A Structural MRI Study of Human Brain Development from Birth to 2 Carolina, Chapel Hill, North Carolina 27599-7510 Brain development in the first 2 years after birth and schizophrenia. Knowledge regarding this period is currently quite limited. We studied structural brain

  8. Numerical modeling of multiphase plumes: a comparative study between two-fluid and mixed-fluid integral models

    E-Print Network [OSTI]

    Bhaumik, Tirtharaj

    2005-11-01T23:59:59.000Z

    Understanding the physics of multiphase plumes and their simulation through numerical modeling has been an important area of research in recent times in the area of environmental fluid mechanics. The two renowned numerical modeling types...

  9. BENCH SCALE SALTSTONE PROCESS DEVELOPMENT MIXING STUDY

    SciTech Connect (OSTI)

    Cozzi, A.; Hansen, E.

    2011-08-03T23:59:59.000Z

    The Savannah River National Laboratory (SRNL) was requested to develop a bench scale test facility, using a mixer, transfer pump, and transfer line to determine the impact of conveying the grout through the transfer lines to the vault on grout properties. Bench scale testing focused on the effect the transfer line has on the rheological property of the grout as it was processed through the transfer line. Rheological and other physical properties of grout samples were obtained prior to and after pumping through a transfer line. The Bench Scale Mixing Rig (BSMR) consisted of two mixing tanks, grout feed tank, transfer pump and transfer hose. The mixing tanks were used to batch the grout which was then transferred into the grout feed tank. The contents of the feed tank were then pumped through the transfer line (hose) using a progressive cavity pump. The grout flow rate and pump discharge pressure were monitored. Four sampling stations were located along the length of the transfer line at the 5, 105 and 205 feet past the transfer pump and at 305 feet, the discharge of the hose. Scaling between the full scale piping at Saltstone to bench scale testing at SRNL was performed by maintaining the same shear rate and total shear at the wall of the transfer line. The results of scaling down resulted in a shorter transfer line, a lower average velocity, the same transfer time and similar pressure drops. The condition of flow in the bench scale transfer line is laminar. The flow in the full scale pipe is in the transition region, but is more laminar than turbulent. The resulting plug in laminar flow in the bench scale results in a region of no-mixing. Hence mixing, or shearing, at the bench scale should be less than that observed in the full scale, where this plug is non existent due to the turbulent flow. The bench scale tests should be considered to be conservative due to the highly laminar condition of flow that exists. Two BSMR runs were performed. In both cases, wall shearing was shown to reduce the rheological properties of the grout as it was processed through the transfer line. Samples taken at the static feed tank showed that gelling impacted the rheological properties of the grout before it was fed into the pump and transfer line. A comparison of the rheological properties of samples taken at the feed tank and transfer line discharge indicated shearing of the grout was occurring in the transfer line. Bench scale testing of different mixing methods with three different salt solutions showed that method of mixing influences the rheological properties of the grouts. The paddle blade mixing method of the salt solution used for the BMSR testing provided comparable rheological properties of the grout prepared in the BMSR after 14 minutes of processing, B3. The paddle blade mixing method can be used to represent BMSR results and mixing time can be adjusted to represent larger scale mixing.

  10. Numerous studies have shown that airborne particulate matter (PM) is associated with

    E-Print Network [OSTI]

    Dominici, Francesca

    - pended particles (TSP), coefficient of haze (COH), black smoke, British smoke, KM (a measure such as ozone (O3) [Health Effects Institute 2002; National Research Council (NRC) 2004]. Studies have) (Burnett et al. 2000), ammonium nitrate (Fairley 1999), ele- mental carbon (EC), organic carbon (OC

  11. Numerical study of friction-induced instability and acoustic radiation -Effect of ramp loading on the

    E-Print Network [OSTI]

    Boyer, Edmond

    is conducted for two cases of loadings and initial conditions: a static load near the associated sliding harmonic components in the velocity spectrum. Finally, the sound pressure convergence study shows that only a frictional interface [1]. During the braking process of a disc brake system, a hydraulic pressure is applied

  12. A numerical study of convection in a channel with porous baffles

    E-Print Network [OSTI]

    Miranda, Bruno Monte Da Silva

    2005-02-17T23:59:59.000Z

    (DF) was considered for this study. The Brinkman-Forchheimer-extended Darcy model was used for modeling the heat transfer and fluid flow through the porous baffles. The flow was assumed to be laminar. A finite volume based method in conjunction...

  13. ESTUDIOS NUMERICOS DE AEROFRACTURES EN MEDIOS POROSOS NUMERICAL STUDIES OF AEROFRACTURES IN POROUS MEDIA

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    by fluid or gases can cause diverse materi- als to break and fracture. Such hydraulic fractures, 67084 Strasbourg Cedex, France d) Centre for Advanced Study at the Norwegian Academy of Science propagacion de fractura y la presion de inyeccion. During the hydraulically induced compaction

  14. Numerical Study on Transverse Friction of a Slender Rod Contacting the Seabed

    E-Print Network [OSTI]

    Lu, Hang

    2012-10-19T23:59:59.000Z

    support force and longitudinal (along the direction of the rod) friction from soils of the seabed while the transverse (in the direction transverse to the slender rod) friction between the rod and the seabed soils is not considered. In this study, we...

  15. NUMERICAL AND EXPERIMENTAL STUDY FOR A BEAM SYSTEM WITH LOCAL UNILATERAL CONTACT MODELING

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    reduction of satellite solar arrays results in signifi- cant panel flexibility, so possibly striking one of the satellite under a test on a shaker 2 INTRODUCTION The study of the total dynamic behavior of solar arrays SOLAR ARRAYS Hamad Hazim(1) , Bernard Rousselet(1) and Neil Ferguson(2) (1) J.A.D. Laboratory

  16. Numerical study of the diapycnal flow through a tidal front with passive tracers

    E-Print Network [OSTI]

    Dong, Changming "Charles"

    . This qualitatively agrees with a recent field experiment using a dye tracer on Georges Bank. Additional experiments are performed to investigate the sensitivity of the tracer dispersion to the tidal phase and the location, the previous studies indicated Eulerian cross-front mean circu- lation maybe is in a multiple-cell structure

  17. Study of a numerical scheme for miscible two-phase flow in porous media

    E-Print Network [OSTI]

    Boyer, Edmond

    holds for CO2 storage, gas pro- duction, and other situations. For x and t [0, T], we consider Schleper November 21, 2013 Abstract We study the convergence of a finite volume scheme for a model of miscible two-phase flow in porous media. In this model, one phase can dissolve into the other one

  18. Specifications for the development of a fully three-dimensional numerical groundwater model for regional mass transport of radionuclides from a deep waste repository

    SciTech Connect (OSTI)

    Prickett, T.A.

    1980-04-01T23:59:59.000Z

    Specifications are given which are necessary to develop a three-dimensional numerical model capable of simulating regional mass transport of radionuclides from a deep waste repository. The model to be developed will include all of the significant mass transport processes including flow, chemical, and thermal advection, mechanical dispersion, molecular diffusion, ion exchange reactions, and radioactive decay. The model specifications also include that density and viscosity fluid properties be functions of pressure, temperature, and concentration and take into account fluid and geologic heterogenieties by allowing possible assignment of individual values to every block of the model. The model specifications furthermore include the repository shape, input/output information, boundary conditions, and the need for documentation and a user's manual. Model code validation can be accomplished with the included known analytical or laboratory solutions. It is recommended that an existing finite-difference model (developed by INTERCOMP and INTERA, Inc.) be used as a starting point either as an acceptable basic code for modification or as a pattern for the development of a completely different numerical scheme. A ten-step plan is given to outline the general procedure for development of the code.

  19. Numerical study on a 0.4 THz second harmonic gyrotron with high power

    SciTech Connect (OSTI)

    Chaojun, Lei [Terahertz Science and Technology Research Center, University of Electronics Science and Technology of China, Chengdu 610054 (China) [Terahertz Science and Technology Research Center, University of Electronics Science and Technology of China, Chengdu 610054 (China); The Chinese People's Armed Police Force Academy, Langfang 065000 (China); Sheng, Yu; Hongfu, Li; Yinghui, Liu; Xinjian, Niu; Qixiang, Zhao [Terahertz Science and Technology Research Center, University of Electronics Science and Technology of China, Chengdu 610054 (China)] [Terahertz Science and Technology Research Center, University of Electronics Science and Technology of China, Chengdu 610054 (China)

    2013-07-15T23:59:59.000Z

    Terahertz and sub-terahertz science and technology are promising topics today. However, it is difficult to obtain high power source of terahertz wave. In this paper, the mode competition and beam-wave interaction in a gradually tapered cavity are studied to achieve high efficiency of a 0.4THz second harmonic gyrotron in practice. In order to attain high power and stable radiation, the TE{sub 32,5} mode is selected as the operating mode of the desired gyrotron to realize single mode oscillation. The issues of studying on the high-order mode gyrotrons are solved effectively by transforming the generalized telegraphist's equations. The efficiency and output power of the gyrotron under different conditions have been calculated by the code, which is based on the transformed equations. Consequently, the results show that single mode second harmonic radiation with power of over 150 kW at frequency of 0.4 THz could be achieved.

  20. A Feasibility Study for Probabilistic Convection Initiation Forecasts Based on Explicit Numerical Guidance2

    E-Print Network [OSTI]

    Lakshmanan, Valliappa

    , Steven J. Weiss2 , Fanyou Kong4,5 , Ming Xue4,5 , Ryan A. Sobash1,4 , Andrew R. Dean2 , Israel L. Jirak2 ,6 and Christopher J. Melick2,3 8 1 NOAA/National Severe Storms Laboratory, Norman, OK10 2 NOAA/Storm Prediction Center, Norman, OK 3 Cooperative Institute for Mesoscale Meteorological Studies, Norman, OK12 4

  1. Final Progress Report: Collaborative Research: Decadal-to-Centennial Climate & Climate Change Studies with Enhanced Variable and Uniform Resolution GCMs Using Advanced Numerical Techniques

    SciTech Connect (OSTI)

    Fox-Rabinovitz, M; Cote, J

    2009-06-05T23:59:59.000Z

    The joint U.S-Canadian project has been devoted to: (a) decadal climate studies using developed state-of-the-art GCMs (General Circulation Models) with enhanced variable and uniform resolution; (b) development and implementation of advanced numerical techniques; (c) research in parallel computing and associated numerical methods; (d) atmospheric chemistry experiments related to climate issues; (e) validation of regional climate modeling strategies for nested- and stretched-grid models. The variable-resolution stretched-grid (SG) GCMs produce accurate and cost-efficient regional climate simulations with mesoscale resolution. The advantage of the stretched grid approach is that it allows us to preserve the high quality of both global and regional circulations while providing consistent interactions between global and regional scales and phenomena. The major accomplishment for the project has been the successful international SGMIP-1 and SGMIP-2 (Stretched-Grid Model Intercomparison Project, phase-1 and phase-2) based on this research developments and activities. The SGMIP provides unique high-resolution regional and global multi-model ensembles beneficial for regional climate modeling and broader modeling community. The U.S SGMIP simulations have been produced using SciDAC ORNL supercomputers. Collaborations with other international participants M. Deque (Meteo-France) and J. McGregor (CSIRO, Australia) and their centers and groups have been beneficial for the strong joint effort, especially for the SGMIP activities. The WMO/WCRP/WGNE endorsed the SGMIP activities in 2004-2008. This project reflects a trend in the modeling and broader communities to move towards regional and sub-regional assessments and applications important for the U.S. and Canadian public, business and policy decision makers, as well as for international collaborations on regional, and especially climate related issues.

  2. A numerical study comparing the combustion and emission characteristics of biodiesel with petrodiesel.

    SciTech Connect (OSTI)

    Som, S.; Longman, D. (Energy Systems)

    2011-04-01T23:59:59.000Z

    Combustion and emission characteristics of compression ignition engines strongly depend upon inner-nozzle flow and spray behavior. These processes control the fuel-air mixing, which in turn is critical for the combustion process. Previous studies by us highlighted the differences in the physical and chemical properties of petrodiesel and biodiesel, which significantly altered the inner-nozzle flow and spray structure. The current study is another step in this direction to gain a fundamental understanding on the influence of fuel properties on the combustion and emission characteristics of the compression ignition engine. n-Heptane and methyl butanoate were selected as surrogates for diesel and biodiesel fuels, respectively, because the chemical kinetic pathways were well-understood. Liquid length and flame lift-off length for diesel and biodiesel fuels were validated against data available in the literature. Liquid lengths were always higher for biodiesel because of its higher heat of vaporization, which resulted in increased interplay between spray and combustion processes under all conditions investigated. Ambient air entrainment was also lower for biodiesel mainly because of slower atomization and breakup. The mechanism for flame stabilization is further analyzed by estimating the turbulent burning velocity for both of the fuels. This analysis revealed that neither flame propagation nor isolated ignition kernels upstream and detached from high-temperature regions can be the mechanism for flame stabilization. Flame propagation speeds were observed to be similar for both fuels. Biodiesel predicted lower soot concentrations, which were also reflected in reduced C{sub 2}H{sub 2} mole fractions. Although prompt NO{sub x} was higher for biodiesel, total NO{sub x} was lower because of reduced thermal NO{sub x}. The ignition delay and NO{sub x} emissions predicted by these simulations do not agree with trends reported in the literature; hence, this study highlights the need for better fuel surrogates for diesel and biodiesel fuels.

  3. Three-dimensional numerical simulations of heat transfer in an annular fuel channel with periodic spacer ribs under a fully developed turbulent flow

    SciTech Connect (OSTI)

    Takase, Kazuyuki [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)

    1997-05-01T23:59:59.000Z

    Thermal-hydraulic characteristics in a spacer-ribbed annular fuel channel for high-temperature gas-cooled reactors were analyzed numerically by three-dimensional computations under a fully developed turbulent flow. The two-equation {kappa}-{epsilon} turbulence model was applied in the present turbulent analysis, and the turbulence model constants for eddy viscosity and the turbulent Prandtl number were improved from the previous standard values to increase the accuracy of numerical simulations. Consequently, heat transfer coefficients and friction factors in the spacer-ribbed fuel channel were predicted with sufficient accuracy in the range of Reynolds number >3,000. It was clarified quantitatively that the main mechanism for heat transfer augmentation in the spacer-ribbed fuel channel was a combined effect of the turbulence promoter effect by the spacer rib and the velocity acceleration effect by a reduction in the channel cross section.

  4. Numerical studies of the melting transition in 2D Yukawa systems

    SciTech Connect (OSTI)

    Hartmann, P.; Donko, Z. [Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49 (Hungary); Kalman, G. J. [Department of Physics, Boston College, Chestnut Hill, MA 02467 (United States)

    2008-09-07T23:59:59.000Z

    We present the latest results of our systematic studies of the solid--liquid phase transition in 2D classical many-particle systems interacting with the Yukawa potential. Our previous work is extended by applying the molecular dynamic simulations to systems with up to 1.6 million particles in the computational box (for {kappa} = 2 case). Equilibrium simulations are performed for different coupling parameters in the vicinity of the expected melting transition ({gamma}{sub m}{sup {kappa}}{sup ={sup 2}}{approx_equal}415) and a wide range of observables are averaged over uncorrelated samples of the micro-canonical ensemble generated by the simulations.

  5. Studying Code Development for High Performance Computing: The HPCS Program

    E-Print Network [OSTI]

    Basili, Victor R.

    Studying Code Development for High Performance Computing: The HPCS Program Jeff Carver1 , Sima at measuring the development time for programs written for high performance computers (HPC). Our goal. Introduction The development of High-Performance Computing (HPC) programs (codes) is crucial to progress

  6. Roadmap: Human Development and Family Studies -Gerontology -Bachelor of Science

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Human Development and Family Studies - Gerontology - Bachelor of Science [EH Catalog Year: 20122013 Page 1 of 3 | Last Updated: 8-June-12/JS This roadmap is a recommended semester or upper division) 3 See note 2 on page 2 #12;Roadmap: Human Development and Family Studies - Gerontology

  7. Numerical Integration Gordon K. Smyth

    E-Print Network [OSTI]

    Smyth, Gordon K.

    Numerical Integration Gordon K. Smyth in Encyclopedia of Biostatistics (ISBN 0471 975761) Edited by Peter Armitage and Theodore Colton John Wiley & Sons, Ltd, Chichester, 1998 #12;Numerical Integration Numerical integration is the study of how the numerical value of an integral can be found. Also called

  8. Development and verification of a numerical simulator to calculate the bottom hole flowing pressures in multiphase systems

    E-Print Network [OSTI]

    Rasool, Syed Ahmed

    1994-01-01T23:59:59.000Z

    A vast amount of research has been conducted on the subject of pressure drop in muldphase flow systems. The simulator developed for this research incorporates the Beggs and Brill model for pressure drop prediction with an equation of state...

  9. Numerical modeling of carrier gas flow in atomic layer deposition vacuum reactor: A comparative study of lattice Boltzmann models

    SciTech Connect (OSTI)

    Pan, Dongqing; Chien Jen, Tien [Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201 (United States); Li, Tao [School of Mechanical Engineering, Dalian University of Technology, Dalian 116024 (China); Yuan, Chris, E-mail: cyuan@uwm.edu [Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211 (United States)

    2014-01-15T23:59:59.000Z

    This paper characterizes the carrier gas flow in the atomic layer deposition (ALD) vacuum reactor by introducing Lattice Boltzmann Method (LBM) to the ALD simulation through a comparative study of two LBM models. Numerical models of gas flow are constructed and implemented in two-dimensional geometry based on lattice BhatnagarGrossKrook (LBGK)-D2Q9 model and two-relaxation-time (TRT) model. Both incompressible and compressible scenarios are simulated and the two models are compared in the aspects of flow features, stability, and efficiency. Our simulation outcome reveals that, for our specific ALD vacuum reactor, TRT model generates better steady laminar flow features all over the domain with better stability and reliability than LBGK-D2Q9 model especially when considering the compressible effects of the gas flow. The LBM-TRT is verified indirectly by comparing the numerical result with conventional continuum-based computational fluid dynamics solvers, and it shows very good agreement with these conventional methods. The velocity field of carrier gas flow through ALD vacuum reactor was characterized by LBM-TRT model finally. The flow in ALD is in a laminar steady state with velocity concentrated at the corners and around the wafer. The effects of flow fields on precursor distributions, surface absorptions, and surface reactions are discussed in detail. Steady and evenly distributed velocity field contribute to higher precursor concentration near the wafer and relatively lower particle velocities help to achieve better surface adsorption and deposition. The ALD reactor geometry needs to be considered carefully if a steady and laminar flow field around the wafer and better surface deposition are desired.

  10. Optimal capacitor placement, replacement and control in large-scale unbalanced distribution systems: System solution algorithm and numerical studies

    SciTech Connect (OSTI)

    Chiang, H.D.; Wang, J.C.; Tong, J. [Cornell Univ., Ithaca, NY (United States). School of Electrical Engineering; Darling, G. [NYSEG Corp., Binghamton, NY (United States). Distribution System Dept.

    1994-12-31T23:59:59.000Z

    This paper develops an effective and, yet, practical solution methodology for optimal capacitor placement, replacement and control in large-scale unbalanced, general radial or loop distribution systems. The solution methodology can optimally determine (1) the locations to install (or replace, or remove) capacitors, (2) the types and sizes of capacitors to be installed (or replaced) and, during each load level, (3) the control schemes for each capacitor in the nodes of a general three-phase unbalanced distribution system such that a desired objective function is minimized while the load constraints, network constraints and operational constraints at different load levels are satisfied. The solution methodology is based on a combination of the simulated annealing technique and the greedy search technique in order to achieve computational speed and high-quality of solutions. Both the numerical and implementational aspects of the solution methodology are detailed. Analysis of the computational complexity of the solution algorithm indicated that the algorithm is also effective for large-scale distribution systems in terms of occupational efforts. Test results on a realistic, unbalanced distribution network, a 291-bus with 77 laterals, 305 distribution lines and 6 transformers, with varying loading conditions, are presented with promising results. The robustness of the solution methodology under varying loading conditions is also investigated.

  11. Optimal capacitor placement, replacement and control in large-scale unbalanced distribution systems: System solution algorithms and numerical studies

    SciTech Connect (OSTI)

    Chiang, H.D.; Wang, J.C.; Tong, J. [Cornell Univ., Ithaca, NY (United States). School of Electrical Engineering; Darling, G. [NYSEG Corp., Binghamton, NY (United States). Distribution System Dept.

    1995-02-01T23:59:59.000Z

    This paper develops an effective and, yet, practical solution methodology for optimal capacitor placement, replacement and control in large-scale unbalanced, general radial or loop distribution systems. The solution methodology can optimally determine (i) the locations to install (or replace, or remove) capacitors, (ii) the types and sizes of capacitors to be installed (or replaced) and, during each load level, (iii) the control schemes for each capacitor in the nodes of a general three-phase unbalanced distribution system such that a desired objective function is minimized while the load constraints, network constraints and operational constraints at different load levels are satisfied. The solution methodology is based on a combination of the simulated annealing technique and the greedy search technique in order to achieve computational speed and high-quality of solutions. Both the numerical and implementational aspects of the solution methodology are detailed. Analysis of the computational complexity of the solution algorithm indicates that the algorithm is also effective for large-scale distribution systems in terms of computational efforts. Test results on a realistic, unbalanced distribution network, a 291-bus with 77 laterals, 305 distribution lines and 6 transformers, with varying loading conditions, are presented with promising results. The robustness of the solution methodology under varying loading conditions is also investigated.

  12. Acoustical study of the development of stop consonants in children

    E-Print Network [OSTI]

    Imbrie, Annika Karin Karlsson

    2005-01-01T23:59:59.000Z

    This study focuses on the acoustic patterns of stop consonants and adjacent vowels as they develop in young children (ages 2;6-3;3) over a six month period. Speech is generated using a series of articulatory, laryngeal, ...

  13. 2002 Fusion Summer Study Subgroup E4 -Development Pathway Subgroup

    E-Print Network [OSTI]

    Najmabadi, Farrokh

    2002 Fusion Summer Study Subgroup E4 - Development Pathway Subgroup Draft by: Farrokh Najmabadi A burning plasma experiment is a key step in developing fusion. The realization of fusion, however, requires and fusion power technologies, etc. An important discriminator among various embodiments of burning plasma

  14. Case Study/ Effects of Groundwater Development on Uranium

    E-Print Network [OSTI]

    Case Study/ Effects of Groundwater Development on Uranium: Central Valley, California, USA Abstract Uranium (U) concentrations in groundwater in several parts of the eastern San Joaquin Valley development during the last 100 years have changed the chemistry and magnitude of groundwater recharge

  15. Role of Aramco in Saudi Arabian development: a case study of dependent development

    SciTech Connect (OSTI)

    Rawls, L.W.

    1987-01-01T23:59:59.000Z

    The primary purpose of this study is to evaluate whether the Kingdom of Saudi Arabia has proceeded along the path toward development while in a dependent relationship with the Arabian American Oil Company, Aramco. Development in a given country is defined as the process by which the living standards of the people who live in that country are raised. That process includes the development of physical and human infrastructure, economic growth, distribution of resources, and the maturation of society (including its ability to weather crisis, whether it be social or economic). Though it is by no means exhaustive on the subject of development in Saudi Arabia, this study focuses on Aramco's involvement in the socio-economic elements of development in Saudi Arabia, as these are the direct impacts of development upon which the Saudi five-year development plans focus. Employing the theoretical framework of dependent development as adapted by Timothy Luke to the OPEC countries' development experience in the international energy regime, this study serves in part as an in-depth case study of Luke's thesis.

  16. Three dimensional numerical study of heat-transfer enhancement by nano-encapsulated phase change material slurry in microtube heat sinks

    E-Print Network [OSTI]

    Zhang, Yuwen

    impingement with nanoencapsulated phase change materials (NEP- CM) slurry as coolant. In this study such as a mixture of nano-encapsulated phase change material to dissipate the heat from the heat sourceThree dimensional numerical study of heat-transfer enhancement by nano-encapsulated phase change

  17. Bull. Disas. Prey. Res. Inst., Kyoto Univ., Vol. 45, Part 2,3 No 390, February, 1996 39 Mesoscale Numerical Study over the HEIFE Area

    E-Print Network [OSTI]

    Takada, Shoji

    Mesoscale Numerical Study over the HEIFE Area Part 1: Three Dimensional Wind Field By Zhong CHEN1),Jiayi, 1996) Abstract In this study the three dimensional mesoscale model, which is based on the Peking University Mesoscale Model, was used to simulate the wind field in the HEIFE experimental region. Simulations

  18. Numerical simulation of flow separation control by oscillatory fluid injection

    E-Print Network [OSTI]

    Resendiz Rosas, Celerino

    2005-08-29T23:59:59.000Z

    In this work, numerical simulations of flow separation control are performed. The sep-aration control technique studied is called 'synthetic jet actuation'. The developed code employs a cell centered finite volume scheme which handles viscous...

  19. Numerical simulation studies of gas production scenarios from hydrate accumulations at the Mallik Site, McKenzie Delta, Canada

    SciTech Connect (OSTI)

    Moridis, George J.; Collett, Timothy S.; Dallimore, Scott R.; Satoh, Tohru; Hancock, Stephen; Weatherill, Brian

    2002-03-22T23:59:59.000Z

    The Mallik site represents an onshore permafrost-associated gas hydrate accumulation in the Mackenzie Delta, Northwest Territories, Canada. An 1150 m deep gas hydrate research well was drilled at the site in 1998. The objective of this study is the analysis of various gas production scenarios from several gas-hydrate-bearing zones at the Mallik site. The TOUGH2 general-purpose simulator with the EOSHYDR2 module were used for the analysis. EOSHYDR2 is designed to model the non-isothermal CH{sub 4} (methane) release, phase behavior and flow under conditions typical of methane-hydrate deposits by solving the coupled equations of mass and heat balance, and can describe any combination of gas hydrate dissociation mechanisms. Numerical simulations indicated that significant gas hydrate production at the Mallik site was possible by drawing down the pressure on a thin free-gas zone at the base of the hydrate stability field. Gas hydrate zones with underlying aquifers yielded significant gas production entirely from dissociated gas hydrate, but large amounts of produced water. Lithologically isolated gas-hydrate-bearing reservoirs with no underlying free gas or water zones, and gas-hydrate saturations of at least 50% were also studied. In these cases, it was assumed that thermal stimulation by circulating hot water in the well was the method used to induce dissociation. Sensitivity studies indicated that the methane release from the hydrate accumulations increases with gas-hydrate saturation, the initial formation temperature, the temperature of the circulating water in the well, and the formation thermal conductivity. Methane production appears to be less sensitive to the rock and hydrate specific heat and permeability of the formation.

  20. Numerical studies of gas production from several CH4-hydrate zones at the Mallik Site, Mackenzie Delta, Canada

    SciTech Connect (OSTI)

    Moridis, George J.; Collett, Timothy S.; Dallimore, Scott R.; Satoh, Tohru; Hancock, Steven; Weatherill, Brian

    2002-05-08T23:59:59.000Z

    The Mallik site represents an onshore permafrost-associated gas hydrate accumulation in the Mackenzie Delta, Northwest Territories, Canada. A gas hydrate research well was drilled at the site in 1998. The objective of this study is the analysis of various gas production scenarios from several gas-hydrate-bearing zones at the Mallik site. The TOUGH2 general-purpose simulator with the EOSHYDR2 module were used for the analysis. EOSHYDR2 is designed to model the non-isothermal CH{sub 4} release, phase behavior and flow under conditions typical of methane-hydrate deposits by solving the coupled equations of mass and heat balance, and can describe any combination of gas hydrate dissociation mechanisms. Numerical simulations indicated that significant gas hydrate production at the Mallik site was possible by drawing down the pressure on a thin free-gas zone at the base of the hydrate stability field. Gas hydrate zones with underlying aquifers yielded significant gas production entirely from dissociated gas hydrate, but large amounts of produced water. Lithologically isolated gas-hydrate-bearing reservoirs with no underlying free gas or water zones, and gas-hydrate saturations of at least 50% were also studied. In these cases, it was assumed that thermal stimulation by circulating hot water in the well was the method used to induce dissociation. Sensitivity studies indicated that the methane release from the hydrate accumulations increases with gas-hydrate saturation, the initial formation temperature, the temperature of the circulating water in the well, and the formation thermal conductivity. Methane production appears to be less sensitive to the rock and hydrate specific heat and permeability of the formation.

  1. Computational Study of the Development of Graphene Based Devices

    E-Print Network [OSTI]

    Bellido Sosa, Edson

    2012-02-14T23:59:59.000Z

    are needed. In this work, a series of studies are performed in order to develop graphene based devices. First, using MD simulations we study the effects of irradiating graphene with a carbon ion atom at several positions and energies from 0.1 eV to 100 ke...

  2. A numerical study of local heat transfer and velocity distributions between blockages with holes in a rectangular channel

    E-Print Network [OSTI]

    Lee, Sang Won

    2002-01-01T23:59:59.000Z

    as the channel and there was an array of staggered holes in the blockages. The channel with blockages modeled the trailing edge internal cooling passage in gas turbine airfoils. Numerical results were obtained for nine cases with different hole configurations...

  3. A numerical study of flow-structure interactions with application to flow past a pair of cylinders

    E-Print Network [OSTI]

    Papaioannou, Georgios (Georgios Vasilios), 1975-

    2004-01-01T23:59:59.000Z

    Flow-structure interaction is a generic problem for many engineering applications, such as flow--induced oscillations of marine risers and cables. In this thesis a Direct Numerical Simulation (DNS) approach based on ...

  4. A Study to Verify the Material Surface Concept of Water Table by Examining Analytical and Numerical Models.

    E-Print Network [OSTI]

    Dadi, Sireesh Kumar

    2011-10-21T23:59:59.000Z

    and both the numerical and the analytical results were compared with a 7-day, constant rate pumping test conducted by University of Waterloo researchers at Canadian Air Force Base Borden in Ontario, Canada....

  5. Mathematical and numerical studies of nonstandard difference equation models of differential equations. Final technical report, September 1995--September 1997

    SciTech Connect (OSTI)

    Mickens, R.E.

    1997-12-12T23:59:59.000Z

    The major thrust of this proposal was to continue our investigations of so-called non-standard finite-difference schemes as formulated by other authors. These schemes do not follow the standard rules used to model continuous differential equations by discrete difference equations. The two major aspects of this procedure consist of generalizing the definition of the discrete derivative and using a nonlocal model (on the computational grid or lattice) for nonlinear terms that may occur in the differential equations. Our aim was to investigate the construction of nonstandard finite-difference schemes for several classes of ordinary and partial differential equations. These equations are simple enough to be tractable, yet, have enough complexity to be both mathematically and scientifically interesting. It should be noted that all of these equations differential equations model some physical phenomena under an appropriate set of experimental conditions. The major goal of the project was to better understand the process of constructing finite-difference models for differential equations. In particular, it demonstrates the value of using nonstandard finite-difference procedures. A secondary goal was to construct and study a variety of analytical techniques that can be used to investigate the mathematical properties of the obtained difference equations. These mathematical procedures are of interest in their own right and should be a valuable contribution to the mathematics research literature in difference equations. All of the results obtained from the research done under this project have been published in the relevant research/technical journals or submitted for publication. Our expectation is that these results will lead to improved finite difference schemes for the numerical integration of both ordinary and partial differential equations. Section G of the Appendix gives a concise summary of the major results obtained under funding by the grant.

  6. Optical Characteristic and Numerical Study of Gold Nanoparticles on Al2O3 coated Gold Film for Tunable Plasmonic Sensing Platforms

    E-Print Network [OSTI]

    Kik, Pieter

    Optical Characteristic and Numerical Study of Gold Nanoparticles on Al2O3 coated Gold Film nanoparticles on aluminum oxide (Al2O3) coated gold films with various oxide thicknesses. Dark-field scattering an investigation of the plasmon resonances of 60 nm diameter gold nanoparticles on Al2O3 coated gold film

  7. Study of Particle Rotation Effect in Gas-Solid Flows using Direct Numerical Simulation with a Lattice Boltzmann Method

    SciTech Connect (OSTI)

    Kwon, Kyung; Fan, Liang-Shih; Zhou, Qiang; Yang, Hui

    2014-09-30T23:59:59.000Z

    A new and efficient direct numerical method with second-order convergence accuracy was developed for fully resolved simulations of incompressible viscous flows laden with rigid particles. The method combines the state-of-the-art immersed boundary method (IBM), the multi-direct forcing method, and the lattice Boltzmann method (LBM). First, the multi-direct forcing method is adopted in the improved IBM to better approximate the no-slip/no-penetration (ns/np) condition on the surface of particles. Second, a slight retraction of the Lagrangian grid from the surface towards the interior of particles with a fraction of the Eulerian grid spacing helps increase the convergence accuracy of the method. An over-relaxation technique in the procedure of multi-direct forcing method and the classical fourth order Runge-Kutta scheme in the coupled fluid-particle interaction were applied. The use of the classical fourth order Runge-Kutta scheme helps the overall IB-LBM achieve the second order accuracy and provides more accurate predictions of the translational and rotational motion of particles. The preexistent code with the first-order convergence rate is updated so that the updated new code can resolve the translational and rotational motion of particles with the second-order convergence rate. The updated code has been validated with several benchmark applications. The efficiency of IBM and thus the efficiency of IB-LBM were improved by reducing the number of the Lagragian markers on particles by using a new formula for the number of Lagrangian markers on particle surfaces. The immersed boundary-lattice Boltzmann method (IBLBM) has been shown to predict correctly the angular velocity of a particle. Prior to examining drag force exerted on a cluster of particles, the updated IB-LBM code along with the new formula for the number of Lagrangian markers has been further validated by solving several theoretical problems. Moreover, the unsteadiness of the drag force is examined when a fluid is accelerated from rest by a constant average pressure gradient toward a steady Stokes flow. The simulation results agree well with the theories for the short- and long-time behavior of the drag force. Flows through non-rotational and rotational spheres in simple cubic arrays and random arrays are simulated over the entire range of packing fractions, and both low and moderate particle Reynolds numbers to compare the simulated results with the literature results and develop a new drag force formula, a new lift force formula, and a new torque formula. Random arrays of solid particles in fluids are generated with Monte Carlo procedure and Zinchenko's method to avoid crystallization of solid particles over high solid volume fractions. A new drag force formula was developed with extensive simulated results to be closely applicable to real processes over the entire range of packing fractions and both low and moderate particle Reynolds numbers. The simulation results indicate that the drag force is barely affected by rotational Reynolds numbers. Drag force is basically unchanged as the angle of the rotating axis varies.

  8. Study in Indonesia and gain credit towards your degree! DevelopmentStudiesImmersionProgram ACICIS

    E-Print Network [OSTI]

    Study in Indonesia and gain credit towards your degree! DevelopmentStudiesImmersionProgram ACICIS an internship in Indonesia! © Photograph by James Walsh #12;w w w . a c i c i s . m u r d o c h . e d u . a u development issues in Indonesia while also gaining im- portant practical skills related to advocacy

  9. Numerical Integration Gordon K. Smyth

    E-Print Network [OSTI]

    Smyth, Gordon K.

    Numerical Integration Gordon K. Smyth May 1997 Numerical integration is the study of how the numerical value of an integral can be found. Also called quadrature, which refers to finding a square whose \\Lambda . Of central interest is the process of approximating a definite integral from values of the in

  10. Study in South Africa and Lesotho A Curriculum Development Project

    E-Print Network [OSTI]

    Viola, Ronald

    Teachers Study in South Africa and Lesotho A Curriculum Development Project Integrating Visual Arts about the cultures and history of the Basotho people of southern Africa Participate in seminars-Hays award, graduate credit and/or CEUs Visit non-malarial and low risk areas in southern Africa and enjoy

  11. Developing A Grid Portal For Large-scale Reservoir Studies

    E-Print Network [OSTI]

    Allen, Gabrielle

    Developing A Grid Portal For Large-scale Reservoir Studies 1 Center for Computation & Technology 2 uncertainty. · Advantages of grid technology · Proposed Solution of the UCoMS Team · What is a Portal? · UCo of reservoir uncertainty... Petroleum drilling consist of many uncertainties. Main objective is to optimize

  12. Pascua Yaqui Tribe Renewable Energy Development and Deployment Feasibility Study

    SciTech Connect (OSTI)

    Arvayo, Maria

    2014-05-30T23:59:59.000Z

    In 2012, PYT was awarded a grant from the Department of Energy Tribal Energy Program to conduct a Renewable Energy Development and Deployment Feasibility Study that would define the technical and economic viability of renewable energy on tribal lands. Red Mountain Energy Partners (RMEP) was hired by PYT to complete the study. Through this study, Red Mountain concluded that there are viable opportunities for solar at Tortuga Ranch, the Casino del Sol and a third site near the Justice Center on Camino de Oeste.

  13. Numerical study of HeleShaw flow with suction Hector D. Ceniceros, Thomas Y. Hou, and Helen Si

    E-Print Network [OSTI]

    Hou, Thomas Yizhao

    with suction are relevant to the process of oil recovery. In these flows, a blob of viscous fluid, surrounded the more viscous fluid is sucked out. In the oil analogy, this fingering process could reduce the amount; accepted 27 May 1999# We investigate numerically the effects of surface tension on the evolution

  14. 2010 OPTICS LETTERS / Vol. 27, No. 22 / November 15, 2002 Study of an ultrahigh-numerical-aperture fiber continuum

    E-Print Network [OSTI]

    Oldenburg, Amy

    -numerical-aperture fiber continuum generation source for optical coherence tomography Daniel L. Marks, Amy L. Oldenburg and a practical enhancement to a fiber-optic optical coherence tomography system. 2002 Op- tical Society custom-made optical components or specialized fibers that are not mass produced or readily available

  15. Numerical Modeling Studies of The Dissolution-Diffusion-Convection ProcessDuring CO2 Storage in Saline Aquifers

    SciTech Connect (OSTI)

    Pruess, Karsten; Zhang, Keni

    2008-11-17T23:59:59.000Z

    For purposes of geologic storage, CO2 would be injected into saline formations at supercritical temperature and pressure conditions, and would form a separate phase that is immiscible with the aqueous phase (brine). At typical subsurface temperature and pressure conditions, supercritical CO2 (scCO2) has lower density than the aqueous phase and would experience an upward buoyancy force. Accordingly, the CO2 is expected to accumulate beneath the caprock at the top of the permeable interval, and could escape from the storage formation wherever (sub-)vertical pathways are available, such as fractures or faults through the caprock, or improperly abandoned wells. Over time, an increasing fraction of CO2 may dissolve in the aqueous phase, and eventually some of the aqueous CO2 may react with rock minerals to form poorly soluble carbonates. Dissolution into the aqueous phase and eventual sequestration as carbonates are highly desirable processes as they would increase permanence and security of storage. Dissolution of CO2 will establish phase equilibrium locally between the overlying CO2 plume and the aqueous phase beneath. If the aqueous phase were immobile, CO2 dissolution would be limited by the rate at which molecular diffusion can remove dissolved CO2 from the interface between CO2-rich and aqueous phases. This is a slow process. However, dissolution of CO2 is accompanied by a small increase in the density of the aqueous phase, creating a negative buoyancy force that can give rise to downward convection of CO2-rich brine, which in turn can greatly accelerate CO2 dissolution. This study explores the process of dissolution-diffusion-convection (DDC), using high-resolution numerical simulation. We find that geometric features of convection patterns are very sensitive to small changes in problem specifications, reflecting self-enhancing feedbacks and the chaotic nature of the process. Total CO2 dissolution rates on the other hand are found to be quite robust against modest changes in problem parameters, and are essentially constant as long as no dissolved CO2 reaches the lower boundary of the system.

  16. Geothermal development of the Madison group aquifer: a case study

    SciTech Connect (OSTI)

    Martinez, J.A.

    1981-01-01T23:59:59.000Z

    A geothermal well has been drilled at the St. Mary's Hospital in Pierre, South Dakota. The well is 2176 feet deep and artesian flows 375 gpm at 106/sup 0/F. The well is producing fluids from the Mississippian Madison Group, a sequence of carbonate rocks deposited over several western states. The project was funded to demonstrate the goethermal potential of this widespread aquifer. This case study describes the development of the project through geology, drilling, stimulation, and testing.

  17. Scalar-Scalar Ladder Model in the Unequal-Mass Case. III - Numerical Studies of the P-Wave Case -

    E-Print Network [OSTI]

    Ichio Fukui; Noriaki Setoh

    1999-01-21T23:59:59.000Z

    The eigenvalue problem for the p-wave bound states formed by two unequal-mass scalar particles through the massive scalar particle exchange is analyzed numerically in the framework of the Bethe-Salpeter ladder model. As in the s-wave case, the eigenvalues of the coupling constant are found to become complex for some mass configurations in some range of the bound state mass. The Bethe-Salpeter amplitudes of the low-lying bound states are also investigated.

  18. PUEBLO OF ZIA RENEWABLE ENERGY DEVELOPMENT FEASIBILITY STUDY

    SciTech Connect (OSTI)

    Pino, Peter M. [Tribal Administrator (Ret.), Pueblo of Zia; Lakshman, Jai [Project Manager (NDA) for Pueblo of Zia; Toole, G. Loren [Principal Investigator, Los Alamos National Laboratory - Energy Analysis Team/ CCS-3, D-4; Hand, Dan [P.E., Sustainable Enginerring; Witcher, James; Emerson, Michael A. [Senior V.P., ARES Corporation; Turner, Jeremy [Executive Director, NM Renewable Energy Transmission Authority; Sandidge, Wendy [Director of Operations, NM Community Capital

    2014-06-30T23:59:59.000Z

    The Pueblo of Zia will conduct a comprehensive feasibility study for best-use application(s) for development of renewable energy resources on its tribally held TRUST lands (i.e., Trust Lands of Zia Indian Reservation). The feasibility study is essential for determining the technical and economic viability of a future renewable project(s) on Zia tribal lands, including the potential economic and environmental benefits for the Tribe. Project Objectives: The feasibility study is essential for determining the technical and economic viability of future renewable project(s) on Zia tribal lands, including the potential economic and environmental benefits for the Tribe to: 1. Provide a balanced local renewable power supply for Zia Pueblo, its members, tribal offices, schools and buildings, and businesses on tribal lands 2. Provide a firm power supply for export and commercial market distribution 3. Provide economic development for the Tribe and its members, including job training and creation, each in accordance with the goals and objectives as conveyed by the Pueblo of Zia Tribal Council, Tribal Administration, and outlined in The Pueblo of Zia Comprehensive Plan and Pueblo of Zia Zia Enterprise Zone Master Plan. A key goal of the study is to analyze the integrated development of solar, geothermal, and wind renewable energy resources at Zia Pueblo, with added potential to combine gas-fired generation to accomplish energy firming. Geothermal offers a base load source of energy, providing power continuously for end users. Wind and solar offer intermediate and peaking sources of energy, which can be harvested throughout the day, with periods of variable but predicable output. Variability will be managed in an integrated manner, using Zia Pueblo's combined renewable resources to generate high-quality power. Tasks are intended to collect, catalog, map, and analyze existing data on Zia Pueblo's renewable energy resource base and then match resource attributes with the most suitable renewable technologies for tribal energy consumption and needs. Also, key impacts on cultural and social values of Zia Pueblo will be addressed. Selected most favorable uses and technologies will be further investigated to determine initial feasibility and market for business development for up to six sites located on tribal land. The anticipated result will be the recommended development of sites that have sufficient background study completed to warrant a business plan, detailed engineering feasibility, and acquisition of project financing. Valuable technical and economic information will accrue from this study that may be applied to scale up or down the various power technology potential on Zia Pueblo for maximum benefit and best area(s) of application, project phasing and potential for future replicability and expansion.

  19. Numerical and physical modeling of hydraulic structures Hydraulic structures are used to control the flow of water in hydropower developments, urban

    E-Print Network [OSTI]

    Barthelat, Francois

    Numerical and physical modeling of hydraulic structures Hydraulic structures are used to control, their solution is found either by physical hydraulic modeling or, more recently, by numerical modeling significantly reduce turbine efficiency and cause premature mechanical failure when they occur at hydropower

  20. Hawaii Solar Integration Study: Solar Modeling Developments and Study Results; Preprint

    SciTech Connect (OSTI)

    Orwig, K.; Corbus, D.; Piwko, R.; Schuerger, M.; Matsuura, M.; Roose, L.

    2012-12-01T23:59:59.000Z

    The Hawaii Solar Integration Study (HSIS) is a follow-up to the Oahu Wind Integration and Transmission Study completed in 2010. HSIS focuses on the impacts of higher penetrations of solar energy on the electrical grid and on other generation. HSIS goes beyond the island of Oahu and investigates Maui as well. The study examines reserve strategies, impacts on thermal unit commitment and dispatch, utilization of energy storage, renewable energy curtailment, and other aspects of grid reliability and operation. For the study, high-frequency (2-second) solar power profiles were generated using a new combined Numerical Weather Prediction model/ stochastic-kinematic cloud model approach, which represents the 'sharp-edge' effects of clouds passing over solar facilities. As part of the validation process, the solar data was evaluated using a variety of analysis techniques including wavelets, power spectral densities, ramp distributions, extreme values, and cross correlations. This paper provides an overview of the study objectives, results of the solar profile validation, and study results.

  1. A procedure for the estimation of the numerical uncertainty of CFD calculations based on grid refinement studies

    SciTech Connect (OSTI)

    Ea, L. [Instituto Superior Tcnico, Department of Mechanical Engineering, Av. Rovisco Pais, 1049-001 Lisbon (Portugal); Hoekstra, M. [Maritime Research Institute Netherlands, PO Box 28 6700 AA, Wageningen (Netherlands)

    2014-04-01T23:59:59.000Z

    This paper offers a procedure for the estimation of the numerical uncertainty of any integral or local flow quantity as a result of a fluid flow computation; the procedure requires solutions on systematically refined grids. The error is estimated with power series expansions as a function of the typical cell size. These expansions, of which four types are used, are fitted to the data in the least-squares sense. The selection of the best error estimate is based on the standard deviation of the fits. The error estimate is converted into an uncertainty with a safety factor that depends on the observed order of grid convergence and on the standard deviation of the fit. For well-behaved data sets, i.e. monotonic convergence with the expected observed order of grid convergence and no scatter in the data, the method reduces to the well known Grid Convergence Index. Examples of application of the procedure are included. - Highlights: Estimation of the numerical uncertainty of any integral or local flow quantity. Least squares fits to power series expansions to handle noisy data. Excellent results obtained for manufactured solutions. Consistent results obtained for practical CFD calculations. Reduces to the well known Grid Convergence Index for well-behaved data sets.

  2. HLW Glass Studies: Development of Crystal-Tolerant HLW Glasses

    SciTech Connect (OSTI)

    Matyas, Josef; Huckleberry, Adam R.; Rodriguez, Carmen P.; Lang, Jesse B.; Owen, Antionette T.; Kruger, Albert A.

    2012-04-02T23:59:59.000Z

    In our study, a series of lab-scale crucible tests were performed on designed glasses of different compositions to further investigate and simulate the effect of Cr, Ni, Fe, Al, Li, and RuO2 on the accumulation rate of spinel crystals in the glass discharge riser of the HLW melter. The experimental data were used to expand the compositional region covered by an empirical model developed previously (Maty et al. 2010b), improving its predictive performance. We also investigated the mechanism for agglomeration of particles and impact of agglomerates on accumulation rate. In addition, the TL was measured as a function of temperature and composition.

  3. Polygons vs. clumps of discs: a numerical study of the influence of grain shape on the mechanical behaviour of granular materials

    E-Print Network [OSTI]

    K. Szarf; G. Combe; P. Villard

    2012-08-02T23:59:59.000Z

    We performed a series of numerical vertical compression tests on assemblies of 2D granular material using a Discrete Element code and studied the results with regard to the grain shape. The samples consist of 5,000 grains made from either 3 overlapping discs (clumps - grains with concavities) or six-edged polygons (convex grains). These two grain type have similar external envelopes, which is a function of a geometrical parameter $\\alpha$. In this paper, the numerical procedure applied is briefly presented followed by the description of the granular model used. Observations and mechanical analysis of dense and loose granular assemblies under isotropic loading are made. The mechanical response of our numerical granular samples is studied in the framework of the classical vertical compression test with constant lateral stress (biaxial test). The comparison of macroscopic responses of dense and loose samples with various grain shapes shows that when $\\alpha$ is considered a concavity parameter, it is therefore a relevant variable for increasing mechanical performances of dense samples. When $\\alpha$ is considered an envelope deviation from perfect sphericity, it can control mechanical performances for large strains. Finally, we present some remarks concerning the kinematics of the deformed samples: while some polygon samples subjected to a vertical compression present large damage zones (any polygon shape), dense samples made of clumps always exhibit thin reflecting shear bands. This paper was written as part of a CEGEO research project www.granuloscience.com

  4. What Makes Development Sustainable? Case Studies of Health and Human Development Programs in Community Context

    E-Print Network [OSTI]

    Saha, Somava

    1996-01-01T23:59:59.000Z

    Management and Sustainable Development. Ambio 18.2 (1989):Sandbrook, Richard. Sustainable Development: What Is to Be3. Redclift, Michael. Sustainable Development: Exploring the

  5. What Makes Development Sustainable? Case Studies of Health and Human Development Programs in Community Context

    E-Print Network [OSTI]

    Saha, Somava

    1996-01-01T23:59:59.000Z

    of Institutions. Making Development Sustainable: Rede?ningIs to Be Done? Making Development Sustainable: RedefiningManagement and Sustainable Development. Ambio 18.2 (1989):

  6. Applications of Numerical Optimal Control to Nonlinear Hybrid Systems

    E-Print Network [OSTI]

    Zefran, Milo?

    , Eaton Corporation, Eden Prairie, Minnesota Abstract This paper develops a technique for numerically

  7. CO2-Driven Enhanced Gas Recovery and Storage in Depleted Shale Reservoir-A Numerical Simulation Study

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    are driving initiatives to develop carbon management technologies, including geologic sequestration of CO2 of carbon dioxide (CO2), especially from the combustion of fossil fuels, are being linked to global climate change and are of considerable concern. These concerns are driving initiatives to develop carbon

  8. Feasibility Study for Renewable Energy Development on Tribal Lands

    SciTech Connect (OSTI)

    John Hendrix, Project Director; Charles Weir, Project Manager; Dr. John Plodinec, Technology Advisor; Dr. Steve Murray, Economic Advisor

    2005-07-21T23:59:59.000Z

    Project Objective: The Mississippi Band of Choctaw Indians (MBCI) conducted a study of the feasibility of siting a renewable energy biomass-based installation on tribal lands. The purpose of the study was to determine whether such an installation can be economically sustainable, as well as consistent with the cultural, social, and economic goals of the Tribe. Scope: To achieve the goal of the feasibility study, the following tasks were carried out: (1) Resource availability assessment--The objective of this assessment was to determine the availability of both poultry litter and wood residues for use in the proposed facility. (2) Power utilization assessment--The objective of this assessment was to determine the potential market size for power produced, the existing infrastructure for delivering power to that market, and the costs and economic returns for doing so. (3) Technology review--The objective of this review was to identify one, or more, technical options for detailed economic and technical assessment. The study considered a range of feedstock and product mixtures of poultry litter; wood residues as feedstock; and electrical power and other ancillary products as outputs. Distributed power sources was also examined. Technologies ranging from gasification to systems that produce both power and value-added chemicals were considered. Technologies selected for detailed review were those that can be sized to process the amount of available feed (poultry litter, or poultry litter and wood residues), and that also appear to make economic sense in terms of the value of their inputs. The technology review leaned heavily on the experience from similar prior DOE projects, particularly those conducted by the National Renewable Energy Laboratory (NREL). NREL was involved in a consultative role, so that the project team could leverage their experience. (4) Systems Design(s)--Based on the technology review, a pre-conceptual design for an installation was developed. This included identification of unit operations and equipment, maintenance, manpower, feedstock requirements, and output (power and any other ancillary products). Energy and mass flows were identified. (5) Manpower development assessment--The objectives of this assessment was to identify training needs for the selected option(s), and determine how they can best be met. Using the manpower estimates from the pre-conceptual system design, skills and training needs were to be identified. A plan for providing the needed manpower was to be developed, and any associated costs determined. (6) Economic assessment--The objective of this assessment was to determine the economic viability and sustainability of the technology option(s) identified through the technical review option. The costs of bringing the feedstock to the proposed facility were combined with nominal operation costs and potential production distribution costs to identify total costs. Revenue from power distribution (and, possibly, from sale of ancillary products) were combined with any possible government credits or payments to identify gross revenue. Economic viability was determined by net revenue and return on investment. A business plan for the selected option was to be produced that would consider long-term sustainability of the project. (7) MBCI compatibility assessment--The objective of this assessment was to determine whether the renewable energy technology was compatible with the MBCI's cultural, social and economic values. As part of this assessment, the environmental impacts and benefits were to be determined (Environmental stewardship is an important part of the Choctaw culture.). The effects of a project on employment were projected. The compatibility of the renewable energy project with MBCI cultural and social values were determined. Most importantly, the compatibility of the renewable energy installation with the MBCIs economic development goals and directions were determined. A project team led by the Mississippi Band of Choctaw Indians (MBCI) conducted the feasibility study. The team included th

  9. Lean and agile software development : a case study

    E-Print Network [OSTI]

    Murray, Collin (Collin J.)

    2008-01-01T23:59:59.000Z

    This paper looks at agile and lean development transitions for organizations that formerly used the waterfall style of development. There has been lots written about the positive aspects of agile software development and ...

  10. Florian SEITZ: Atmospheric and oceanic impacts to Earth rotations numerical studies with a dynamic Earth system model

    E-Print Network [OSTI]

    Schuh, Harald

    with a dynamic Earth system model (completed in October 2004) Variations of Earth rotation are caused Earth system model DyMEG has been developed. It is based on the balance of angular momentum

  11. Compact Gamma-ray Source Technology Development Study

    SciTech Connect (OSTI)

    Anderson, S G; Gibson, D J; Rusnak, B

    2009-09-25T23:59:59.000Z

    This study focuses on the applicability of current accelerator and laser technologies to the construction of compact, narrow bandwidth, gamma-ray sources for DHS missions in illicit materials detection. It also identifies research and development areas in which advancement will directly benefit these light sources. In particular, we review the physics of Compton scattering based light sources and emphasize the source properties most important to Nuclear Resonance Fluorescence (NRF) applications of interest. The influences of laser and electron beam properties on the light source are examined in order to evaluate the utility of different technologies for this application. Applicable bulk and fiber-based laser systems and laser recirculation technologies are discussed and Radio Frequency (RF) Linear Accelerator (linac) technologies are examined to determine the optimal frequency and pulse formats achievable.

  12. NUMERICAL ANALYSIS KENDALL E. ATKINSON

    E-Print Network [OSTI]

    Atkinson, Kendall

    of mathematics and computer science that creates, analyzes, and implements algorithms for solving nu- merically mathematical models in science and engineering, and numerical analysis of increasing sophistication has been of numerical analysis varies from quite theoretical mathematical studies (e.g. see [5]) to computer science

  13. problem exactly in one pass; instead, solve it approximately, then iterate. Multigrid methods, perhaps the most important development in numerical computation in the past twenty years,

    E-Print Network [OSTI]

    Vuik, Kees

    stable---say, of pivoting in Gaussian elimination---may in certain contexts be costineffective. Instead, together with other historical forces, has distracted us for decades from a balanced view of numerical theory of constructive methods in mathematical analysis.'' Others have expressed similar views; Joseph

  14. Case study in rapid product design and development

    E-Print Network [OSTI]

    Winther, Garrett L. (Garrett Lee)

    2011-01-01T23:59:59.000Z

    This thesis explores a new strategy in developing products quickly, cheaply and efficiently, with the hopes to redefine the paradigms behind the product design process. This was carried out through the development of the ...

  15. Experimental and numerical study of the behavior of three-way catalytic converters under different engine operation conditions

    E-Print Network [OSTI]

    Zhang, Yuetao

    2005-01-01T23:59:59.000Z

    The thesis reports the studies on how the three-way catalytic converters behave under different operation conditions. The main focus of the work is in the oxygen storage capacity of the three-way catalyst. Rich-to-lean ...

  16. Two-dimensional numerical study of two counter-propagating helium plasma jets in air at atmospheric pressure

    SciTech Connect (OSTI)

    Yan, Wen; Sang, Chaofeng; Wang, Dezhen, E-mail: wangdez@dlut.edu.cn [Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Liu, Fucheng [College of Physics Science and Technology, Hebei University, Baoding 071002 (China)

    2014-06-15T23:59:59.000Z

    In this paper, a computational study of two counter-propagating helium plasma jets in ambient air is presented. A two-dimensional fluid model is applied to investigate the physical processes of the two plasma jets interaction (PJI) driven by equal and unequal voltages, respectively. In all studied cases, the PJI results in a decrease of both plasma bullets propagation velocity. When the two plasma jets are driven by equal voltages, they never merge but rather approach each other around the middle of the gas gap at a minimum approach distance, and the minimal distance decreases with the increase of both the applied voltages and initial electron density, but increases with the increase of the relative permittivity. When the two plasma jets are driven by unequal voltages, we observe the two plasma jets will merge at the position away from the middle of the gas gap. The effect of applied voltage difference on the PJI is also studied.

  17. Numerical Simulation of Squeeze Film Dampers and Study of the Effect of Central Groove on the Dynamic Pressure Distribution

    E-Print Network [OSTI]

    Boppa, Praneetha

    2012-10-19T23:59:59.000Z

    ................................................................................................... 19 6. RESULTS AND DISCUSSION .............................................................................. 22 6.1 Grid Independent Study22 6.2 Comparison of CFD and Experimental Results ..28... ...................................................................... 25 Figure 9: Pressure contour for 2880 X 45 ...................................................................... 25 Figure 10: Pressure contour for 2880 X 60 ...................................................................... 26 Figure 11...

  18. Numerical methods for electromagnetic wave propagation and scattering in complex media

    E-Print Network [OSTI]

    Moss, Christopher D. Q. (Christopher Doniert Q.), 1973-

    2004-01-01T23:59:59.000Z

    Numerical methods are developed to study various applications in electromagnetic wave propagation and scattering. Analytical methods are used where possible to enhance the efficiency, accuracy, and applicability of the ...

  19. DOE Zero Energy Ready Home Case Study: Brookside Development...

    Broader source: Energy.gov (indexed) [DOE]

    ceilings, R-10 rigid polyiso on basement walls, a tankless gas water heater, and a heat pump with gas furnace backup. Brookside Development: Singer Village Derby - Derby, CT...

  20. Lagrange mesh and exact diagonalization for numerical study of semiconductor quantum dot systems with application in singlet-triplet qubits

    E-Print Network [OSTI]

    Tuukka Hiltunen; Juha Ritala; Oona Kupiainen; Topi Siro; Ari Harju

    2013-01-28T23:59:59.000Z

    We present a highly flexible computational scheme for studying correlated electrons confined by an arbitrary external potential in two-dimensional semiconductor quantum dots. The method starts by a Lagrange mesh calculation for the single-particle states, followed by the calculation of the Coulomb interaction matrix elements between these, and combining both in the exact diagonalization of the many-body Hamiltonian. We apply the method in simulation of double quantum dot singlet-triplet qubits. We simulate the full quantum control and dynamics of one singlet-triplet qubit. We also use our method to provide an exact diagonalization based first-principles model for studying two singlet-triplet qubits and their capacitative coupling via the long-distance Coulomb interaction.

  1. Model Realization and Numerical Studies of a Three-Dimensional Bosonic Topological Insulator and Symmetry-Enriched Topological Phases

    E-Print Network [OSTI]

    Scott Geraedts; Olexei Motrunich

    2014-08-05T23:59:59.000Z

    We study a topological phase of interacting bosons in (3+1) dimensions which is protected by charge conservation and time-reversal symmetry. We present an explicit lattice model which realizes this phase and which can be studied in sign-free Monte Carlo simulations. The idea behind our model is to bind bosons to topological defects called hedgehogs. We determine the phase diagram of the model and identify a phase where such bound states are proliferated. In this phase we observe a Witten effect in the bulk whereby an external monopole binds half of the elementary boson charge, which confirms that it is a bosonic topological insulator. We also study the boundary between the topological insulator and a trivial insulator. We find a surface phase diagram which includes exotic superfluids, a topologically ordered phase, and a phase with a Hall effect quantized to one-half of the value possible in a purely two-dimensional system. We also present models that realize symmetry-enriched topologically-ordered phases by binding multiple hedgehogs to each boson; these phases show charge fractionalization and intrinsic topological order as well as a fractional Witten effect.

  2. Numerical study on a two-dimensional circular cylinder with a rigid and an elastic splitter plate in uniform flow

    SciTech Connect (OSTI)

    Hu, C.H.; Koterayama, Wataru [Kyushu Univ., Kasuga (Japan)

    1994-12-31T23:59:59.000Z

    A two-dimensional incompressible viscous flow around a fixed or elastically supported circular cylinder with a splitter plate of attached rigid, hinged or elastic types, has been simulated by a finite difference method, to study the effect of splitter plate on drag and vortex shedding frequency of the cylinder. The computation is carried out at R{sub e} = 1,000, and the results show in good accordance with the available experimental data. The relationship between the unsteady flow patterns and hydrodynamic force coefficients is also discussed.

  3. Numerical modeling of multiphase plumes: a comparative study between two-fluid and mixed-fluid integral models

    E-Print Network [OSTI]

    Bhaumik, Tirtharaj

    2005-11-01T23:59:59.000Z

    -field effects of a multiphase plume of liquid CO2 droplets in ocean water finds potential in estimating the environmental risks involved due to deep-ocean sequestration of greenhouse gases like carbon dioxide, which is one of the proposed alternatives (Liro... for the diffuser orifice diameter, air-flow rate and the number of such ports necessary to dissolve a measured quantity of air in a given time of operation will also be studied. 3.3. Case 3: CO2 Sequestration in the Ocean Sequestration of carbon dioxide and other...

  4. PROGRESS IN THE PEELING-BALLOONING MODEL OF ELMS: NUMERICAL STUDIES OF 3D NONLINEAR ELM DYNAMICS

    SciTech Connect (OSTI)

    SNYDER,P.B; WILSON,H.R; XU,X.Q

    2004-11-01T23:59:59.000Z

    Nonlinear simulations with the 3D electromagnetic two-fluid BOUT code are employed to study the dynamics of edge localized modes (ELMs) driven by intermediate wavelength peeling-ballooning modes. It is found that the early behavior of the modes is similar to expectations from linear, ideal peeling-ballooning mode theory, with the modes growing linearly at a fraction of the Alfven frequency. In the nonlinear phase, the modes grow explosively, forming a number of extended filaments which propagate rapidly from the outer closed flux region into the open flux region toward the outboard wall. Similarities to non-linear ballooning theory, as well as additional complexities are observed. Comparison to observations reveals a number of similarities. Implications of the simulations and proposals for the dynamics of the full ELM crash are discussed.

  5. Galileo Lofts : a real estate development feasibility study

    E-Print Network [OSTI]

    Ledohowski, Lea J. (Lea Joel)

    2005-01-01T23:59:59.000Z

    In August 2004, a development proposal titled "Galileo Lofts at MIT: Housing and Urban Park" was submitted to the Cambridge Redevelopment Authority for the provision of new housing and a public park on Parcel 7, in Kendall ...

  6. DOE Zero Energy Ready Home Case Study, Dwell Development, Seattle...

    Energy Savers [EERE]

    blown cellulose, R-42 XPS under slab, triple-pane windows, and a ductless mini-split heat pump. Dwell Development - Seattle, WA More Documents & Publications DOE Zero Energy Ready...

  7. New product development methods : a study of open design

    E-Print Network [OSTI]

    Smith, Ariadne G. (Ariadne Genevive)

    2012-01-01T23:59:59.000Z

    This thesis explores the application of open design to the process of developing physical products. Open design is a type of decentralized innovation that is derived from applying principles of open source software and ...

  8. Alternate Solutions to Water Resource Development -- A Case Study

    E-Print Network [OSTI]

    Basco, D. R.; Rahman, K. M. A.

    1974-01-01T23:59:59.000Z

    . Selected solutions for water resources development problems in the Navasota River watershed were analyzed. The cost of water supply by desalination in the service area of the proposed Millican reservoir was computed following the procedure recommended...

  9. EMSL Research and Capability Development Proposals Development of Live and LC-NMR Microbial Metabolomics Methods for Systems Biology Studies

    E-Print Network [OSTI]

    Metabolomics Methods for Systems Biology Studies: A Test Case Relevant to Biofuels Production Project start for enhanced systems biology studies. There are two specific objectives: 1) develop and cross-validate unique analysis, and 2) apply this improved metabolomics capability to study microbial processes relevant

  10. Clouds in the atmospheres of extrasolar planets. IV. On the scattering greenhouse effect of CO2 ice particles: Numerical radiative transfer studies

    E-Print Network [OSTI]

    Kitzmann, D; Rauer, H

    2013-01-01T23:59:59.000Z

    Owing to their wavelengths dependent absorption and scattering properties, clouds have a strong impact on the climate of planetary atmospheres. Especially, the potential greenhouse effect of CO2 ice clouds in the atmospheres of terrestrial extrasolar planets is of particular interest because it might influence the position and thus the extension of the outer boundary of the classic habitable zone around main sequence stars. We study the radiative effects of CO2 ice particles obtained by different numerical treatments to solve the radiative transfer equation. The comparison between the results of a high-order discrete ordinate method and simpler two-stream approaches reveals large deviations in terms of a potential scattering efficiency of the greenhouse effect. The two-stream methods overestimate the transmitted and reflected radiation, thereby yielding a higher scattering greenhouse effect. For the particular case of a cool M-type dwarf the CO2 ice particles show no strong effective scattering greenhouse eff...

  11. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, Charles R.

    2012-01-01T23:59:59.000Z

    13 Javier Perez I II. ETHANOL FERMENTATION STUDIES A. B.Development Studies of Ethanol Production--------------- 19of Cellulose and Production of Ethanol." (June 1979) and (b)

  12. Renewable Energy Laboratory Development for Biofuels Advanced Combustion Studies

    SciTech Connect (OSTI)

    Valentin Soloiu

    2012-03-31T23:59:59.000Z

    The research advanced fundamental science and applied engineering for increasing the efficiency of internal combustion engines and meeting emissions regulations with biofuels. The project developed a laboratory with new experiments and allowed investigation of new fuels and their combustion and emissions. This project supports a sustainable domestic biofuels and automotive industry creating economic opportunities across the nation, reducing the dependence on foreign oil, and enhancing U.S. energy security. The one year period of research developed fundamental knowledge and applied technology in advanced combustion, emissions and biofuels formulation to increase vehicle's efficiency. Biofuels?? combustion was investigated in a Compression Ignition Direct Injection (DI) to develop idling strategies with biofuels and an Indirect Diesel Injection (IDI) intended for auxiliary power unit.

  13. LEADERSHIP DEVELOPMENT IN CONTEXT: A DESCRIPTIVE MIXED METHOD STUDY OF LEADERSHIP DEVELOPMENT ACTIVITIES DURING SIGNIFICANT ORGANIZATIONAL CHANGE

    E-Print Network [OSTI]

    Hasler, Michael G.

    2010-07-14T23:59:59.000Z

    This study explores the extent to which organizational culture and operational environment influence the leadership activities of an organization in the midst of significant organizational change and whether culture drives leadership development...

  14. Innovative Stormwater Management in New Development: Planning Case Study1

    E-Print Network [OSTI]

    Pitt, Robert E.

    wetlands, and site regional facilities in such a manner that they meet both the City's and private land, the City contracted with WBQ Design and Engineering Inc. to provide engineering services for the Narcoossee & McKee Inc. (CDM) to provide engineering services for the development of the Lake Hart basin MSMP

  15. Implications of the FESAC Fusion Development Path Study for

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Study The goal of the plan is operation of a US demonstration power plant (Demo), which will enable electric power production, and ultimately it will demonstrate the commercial practicality of fusion power Studies 47 MFE Detail and Dependencies Theory, Simulation and Basic Plasma Science MST & NSTX 2nd New MFE

  16. Land reform and economic development : case study on Romania

    E-Print Network [OSTI]

    Vidican Sgouridis, Georgeta.

    2004-01-01T23:59:59.000Z

    Few social arrangements have affected so many people for so long in human history, as the laws and customs governing the ownership and use of land. Taking Romania as a case study, this thesis focuses on the institutional ...

  17. Geometric Numerical Methods for Numerical Weather Prediction

    E-Print Network [OSTI]

    Langdon, Stephen

    -Mesh (HPM) Method Label space is discretised into N particles with coordinates on the momentum phase space and Sij = (1 - ^2xx)-1. Geometric Numerical Methods for Numerical Weather Prediction p. 8/28 #12;HPM Equations of shallow water motions The canonical HPM equations of 1D shallow water motion on TS1 are P

  18. Facilities Study For enXco Development Corp.

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy Chinaof EnergyImpactOnSTATEMENT OF DAVID GEISEREnergy1 of 3 PPG developed

  19. Renewable Energy Development on Fort Mojave Reservation Feasiblity Study

    SciTech Connect (OSTI)

    Russell Gum, ERCC analytics LLC

    2008-03-17T23:59:59.000Z

    The Ft. Mojave tribe, whose reservation is located along the Colorado River in the states of Arizona, California, and Nevada near the point where all three states meet, has a need for increased energy supplies. This need is a direct result of the aggressive and successful economic development projects undertaken by the tribe in the last decade. While it is possible to contract for additional energy supplies from fossil fuel sources it was the desire of the tribal power company, AHA MACAV Power Service (AMPS) to investigate the feasibility and desirability of producing power from renewable sources as an alternative to increased purchase of fossil fuel generated power and as a possible enterprise to export green power. Renewable energy generated on the reservation would serve to reduce the energy dependence of the tribal enterprises on off reservation sources of energy and if produced in excess of reservation needs, add a new enterprise to the current mix of economic activities on the reservation. Renewable energy development would also demonstrate the tribes support for improving environmental quality, sustainability, and energy independence both on the reservation and for the larger community.

  20. Experimental and numerical study of the accuracy of flame-speed measurements for methane/air combustion in a slot burner

    SciTech Connect (OSTI)

    Selle, L.; Ferret, B. [Universite de Toulouse, INPT, UPS, IMFT, Institut de Mecanique des Fluides de Toulouse (France); CNRS, IMFT, Toulouse (France); Poinsot, T. [Universite de Toulouse, INPT, UPS, IMFT, Institut de Mecanique des Fluides de Toulouse (France); CNRS, IMFT, Toulouse (France); CERFACS, Toulouse (France)

    2011-01-15T23:59:59.000Z

    Measuring the velocities of premixed laminar flames with precision remains a controversial issue in the combustion community. This paper studies the accuracy of such measurements in two-dimensional slot burners and shows that while methane/air flame speeds can be measured with reasonable accuracy, the method may lack precision for other mixtures such as hydrogen/air. Curvature at the flame tip, strain on the flame sides and local quenching at the flame base can modify local flame speeds and require corrections which are studied using two-dimensional DNS. Numerical simulations also provide stretch, displacement and consumption flame speeds along the flame front. For methane/air flames, DNS show that the local stretch remains small so that the local consumption speed is very close to the unstretched premixed flame speed. The only correction needed to correctly predict flame speeds in this case is due to the finite aspect ratio of the slot used to inject the premixed gases which induces a flow acceleration in the measurement region (this correction can be evaluated from velocity measurement in the slot section or from an analytical solution). The method is applied to methane/air flames with and without water addition and results are compared to experimental data found in the literature. The paper then discusses the limitations of the slot-burner method to measure flame speeds for other mixtures and shows that it is not well adapted to mixtures with a Lewis number far from unity, such as hydrogen/air flames. (author)

  1. A Case Study in Developing Process Unit Energy Metrics

    E-Print Network [OSTI]

    Davis, J. L.; Van Atta, B.

    2006-01-01T23:59:59.000Z

    At the 2005 IETC Conference, KBC (Davis and Knight) submitted a paper on Integrating Process Unit Energy Metrics into a Plant Energy Managemenet System. For the 2006 conference, KBC wishes to submit a paper that details an actual case study where...

  2. A Case Study in Developing Process Unit Energy Metrics

    E-Print Network [OSTI]

    Davis, J. L.; Van Atta, B.

    2006-01-01T23:59:59.000Z

    At the 2005 IETC Conference, KBC (Davis and Knight) submitted a paper on Integrating Process Unit Energy Metrics into a Plant Energy Managemenet System. For the 2006 conference, KBC wishes to submit a paper that details an actual case study where...

  3. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Assessing the Sustainability of the UBC Campus

    E-Print Network [OSTI]

    scale. The group has developed a tool by which sustainability of the UBC campus may be periodically defined "sustainable development as `development that meets the needs of the present without compromisingUBC Social Ecological Economic Development Studies (SEEDS) Student Report Assessing

  4. Structured Formal Development in VSE II: The Robertino Case Study

    E-Print Network [OSTI]

    Reif, Wolfgang

    ­of­ freedom and 1/3 scale gantry robot, built for the design validation of the Remote #12; Fig. 1. Robertino: -- It is a Cartesian robot with 4 degrees of freedom (x; y; z; w axes); the w­ axis is for the gripper used to grasp robots in safety critical environments. This case study was used to evaluate the VSE methodol­ ogy

  5. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Nick Gaguano

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCAUBC Social Ecological Economic Development Studies (SEEDS) Student Report Nick Gaguano Fred Kaiser .........................................................8 System Boundary

  6. Development of an atmospheric aerosol model for studies of global budgets and effects of airborne particulate material

    SciTech Connect (OSTI)

    Giorgi, F.

    1986-01-01T23:59:59.000Z

    A microphysics-removal Atmospheric Aerosol Model (AAM) is developed for use in General Circulation Models (GCM) to study global budgets and effects of particulate material. In this model the particle population is assumed to be composed of a set of log-normal modes whose time evolution due to microphysical processes is described via prognostic equations for an appropriate number of moments of the particle size distribution. This newly devised technique, by making use of a small number of prognostic equations for the aerosol variables and utilizing optimized numerical procedures, renders the model computationally efficient, hence particularly suitable for use in complex 3D GCMs. Detailed parameterizations of particle coagulation, sedimentation, dry deposition, and wet removal are incorporated into the AAM.

  7. Indonesia-Low Carbon Development Options Study | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, search OpenEIHesperia,IDGWPIndiantown, Florida: EnergyStudy Jump to: navigation,

  8. Indonesia-Low Carbon Development Options Study | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup | OpenHunan Runhua NewSmallholder SystemsIndoEnergyMeasuresStudy

  9. How do Distribution and Time Zones affect Software Development? A Case Study on

    E-Print Network [OSTI]

    Meyer, Bertrand

    How do Distribution and Time Zones affect Software Development? A Case Study on Communication local developments to geographically distributed projects. This paper presents a case study analyzing the effect of distribution and time zones on com- munication in distributed projects. The study was performed

  10. Numerical study on convection diffusion for gasification agent in underground coal gasification. Part I: establishment of mathematical models and solving method

    SciTech Connect (OSTI)

    Yang, L.H.; Ding, Y.M. [China University of Mining & Technology, Xuzhou (China). College of Resources and Geoscience

    2009-07-01T23:59:59.000Z

    The aim of this article is to discuss the distribution law of the gasification agent concentration in a deep-going way during underground coal gasification and the new method of solving the problem for the convection diffusion of the gas. In this paper, the basic features of convection diffusion for the gas produced in underground coal gasification are studied. On the basis of the model experiment, through the analysis of the distribution and patterns of variation for the fluid concentration field in the process of the combustion and gasification of the coal seams within the gasifier, the 3-D non-linear unstable mathematical models on the convection diffusion for oxygen are established. In order to curb such pseudo-physical effects as numerical oscillation and surfeit which frequently occurred in the solution of the complex mathematical models, the novel finite unit algorithm, the upstream weighted multi-cell balance method is advanced in this article, and its main derivation process is introduced.

  11. Final Progress Report submitted via the DOE Energy Link (E-Link) in June 2009 [Collaborative Research: Decadal-to-Centennial Climate & Climate Change Studies with Enhanced Variable and Uniform Resolution GCMs Using Advanced Numerical Techniques

    SciTech Connect (OSTI)

    Fox-Rabinovitz, M; Cote, J

    2009-10-09T23:59:59.000Z

    The joint U.S-Canadian project has been devoted to: (a) decadal climate studies using developed state-of-the-art GCMs (General Circulation Models) with enhanced variable and uniform resolution; (b) development and implementation of advanced numerical techniques; (c) research in parallel computing and associated numerical methods; (d) atmospheric chemistry experiments related to climate issues; (e) validation of regional climate modeling strategies for nested- and stretched-grid models. The variable-resolution stretched-grid (SG) GCMs produce accurate and cost-efficient regional climate simulations with mesoscale resolution. The advantage of the stretched grid approach is that it allows us to preserve the high quality of both global and regional circulations while providing consistent interactions between global and regional scales and phenomena. The major accomplishment for the project has been the successful international SGMIP-1 and SGMIP-2 (Stretched-Grid Model Intercomparison Project, phase-1 and phase-2) based on this research developments and activities. The SGMIP provides unique high-resolution regional and global multi-model ensembles beneficial for regional climate modeling and broader modeling community. The U.S SGMIP simulations have been produced using SciDAC ORNL supercomputers. The results of the successful SGMIP multi-model ensemble simulations of the U.S. climate are available at the SGMIP web site (http://essic.umd.edu/~foxrab/sgmip.html) and through the link to the WMO/WCRP/WGNE web site: http://collaboration.cmc.ec.gc.ca/science/wgne. Collaborations with other international participants M. Deque (Meteo-France) and J. McGregor (CSIRO, Australia) and their centers and groups have been beneficial for the strong joint effort, especially for the SGMIP activities. The WMO/WCRP/WGNE endorsed the SGMIP activities in 2004-2008. This project reflects a trend in the modeling and broader communities to move towards regional and sub-regional assessments and applications important for the U.S. and Canadian public, business and policy decision makers, as well as for international collaborations on regional, and especially climate related issues.

  12. A 2-D numerical study of chaotic flow in a natural convection loop El Hassan Ridouane a,*, Christopher M. Danforth a,b

    E-Print Network [OSTI]

    Danforth, Chris

    as it is widely used in solar water heaters, nuclear reactors, gas turbine blade cooling, and other applications volume method. The numerical simulations are performed for water corresponding to Pr = 5.83 and Rayleigh

  13. Numerical Simulation of Flow Field Inside a Squeeze Film Damper and the Study of the Effect of Cavitation on the Pressure Distribution

    E-Print Network [OSTI]

    Khandare, Milind Nandkumar

    2012-02-14T23:59:59.000Z

    Squeeze Film Dampers (SFDs) are employed in high-speed Turbomachinery, particularly aircraft jet engines, to provide external damping. Despite numerous successful applications, it is widely acknowledged that the theoretical ...

  14. The development of optical microscopy techniques for the advancement of single-particle studies

    SciTech Connect (OSTI)

    Marchuk, Kyle

    2013-05-15T23:59:59.000Z

    Single particle orientation and rotational tracking (SPORT) has recently become a powerful optical microscopy tool that can expose many molecular motions. Unfortunately, there is not yet a single microscopy technique that can decipher all particle motions in all environmental conditions, thus there are limitations to current technologies. Within, the two powerful microscopy tools of total internal reflection and interferometry are advanced to determine the position, orientation, and optical properties of metallic nanoparticles in a variety of environments. Total internal reflection is an optical phenomenon that has been applied to microscopy to produce either fluorescent or scattered light. The non-invasive far-field imaging technique is coupled with a near-field illumination scheme that allows for better axial resolution than confocal microscopy and epi-fluorescence microscopy. By controlling the incident illumination angle using total internal reflection fluorescence (TIRF) microscopy, a new type of imaging probe called non-blinking quantum dots (NBQDs) were super-localized in the axial direction to sub-10-nm precision. These particles were also used to study the rotational motion of microtubules being propelled by the motor protein kinesin across the substrate surface. The same instrument was modified to function under total internal reflection scattering (TIRS) microscopy to study metallic anisotropic nanoparticles and their dynamic interactions with synthetic lipid bilayers. Utilizing two illumination lasers with opposite polarization directions at wavelengths corresponding to the short and long axis surface plasmon resonance (SPR) of the nanoparticles, both the in-plane and out-of-plane movements of many particles could be tracked simultaneously. When combined with Gaussian point spread function (PSF) fitting for particle super-localization, the binding status and rotational movement could be resolved without degeneracy. TIRS microscopy was also used to find the 3D orientation of stationary metallic anisotropic nanoparticles utilizing only long-axis SPR enhancement. The polarization direction of the illuminating light was rotated causing the relative intensity of p-polarized and s-polarized light within the evanescent field to change. The interaction of the evanescent field with the particles is dependent on the orientation of the particle producing an intensity curve. This curve and the in-plane angle can be compared with simulations to accurately determine the 3D orientation. Differential interference contrast (DIC) microscopy is another non-invasive far-field technique based upon interferometry that does not rely on staining or other contrast enhancing techniques. In addition, high numerical aperture condensers and objectives can be used to give a very narrow depth of field allowing for the optical tomography of samples, which makes it an ideal candidate to study biological systems. DIC microscopy has also proven itself in determining the orientation of gold nanorods in both engineered environments and within cells. Many types of nanoparticles and nanostructures have been synthesized using lithographic techniques on silicon wafer substrates. Traditionally, reflective mode DIC microscopes have been developed and applied to the topographical study of reflective substrates and the imaging of chips on silicon wafers. Herein, a laser-illuminated reflected-mode DIC was developed for studying nanoparticles on reflective surfaces.

  15. Land development approaches in the context of land scarcity : case study, Byblos, Lebanon

    E-Print Network [OSTI]

    Asdourian, Avedis

    1986-01-01T23:59:59.000Z

    The objective of this study is to provide a general understanding for guiding urban development in secondary cities in Lebanon. An existing site in the Byblos Metropolitan Area is utilized as a reference to this study. The ...

  16. New Studies Portray Unbalanced Perspective on Biofuels DOE Committed to Environmentally Sound Biofuels Development

    E-Print Network [OSTI]

    Minnesota, University of

    New Studies Portray Unbalanced Perspective on Biofuels DOE Committed to Environmentally Sound Biofuels Development DOE Response based on contributions from Office of Biomass Program; Argonne National, Hill, Tilman, Polasky and Hawthorne study ("Land Clearing and the Biofuel Carbon Debt") claims

  17. Fish Embryos Exposed to Oil From BP Spill Develop Deformities, a Study Finds

    E-Print Network [OSTI]

    Grosell, Martin

    Fish Embryos Exposed to Oil From BP Spill Develop Deformities, a Study Finds By MICHAEL WINESMARCH Horizon spill developed heart and other deformities that would probably kill some of the developing fish assessment of damages for the disaster that will be borne by BP, which operated the oil platform in the Gulf

  18. DEVELOPMENT OF A LOW-COST ROBOTIC MANIPULATOR AND ITS APPLICATION TO HUMAN MOTOR CONTROL STUDIES

    E-Print Network [OSTI]

    Moussavi, Zahra M. K.

    DEVELOPMENT OF A LOW-COST ROBOTIC MANIPULATOR AND ITS APPLICATION TO HUMAN MOTOR CONTROL STUDIES C impedance controlled manipulator to study human motor learning. In particular, the focus was to develop of the mechanical and control components of the manipulator were completed with the aim of applying the system

  19. Hydrogen targets for exotic-nuclei studies developed over the past 10 years

    E-Print Network [OSTI]

    A. Obertelli; T. Uesaka

    2011-09-23T23:59:59.000Z

    Hydrogen-induced reactions provide essential information on nuclear structure, complementary to other experimental probes. For studies at both low and relativistic incident energy, developments in hydrogen targets have been performed over the past 10 years in parallel with the development of new radioactive beams. We present a review of all major hydrogen target developments related to the study of exotic nuclei with direct reactions in inverse kinematics. Both polarized and non-polarized systems are presented.

  20. Numerical study of the THM effects on the near-field safety of a hypothetical nuclear waste repository--BMT1 of the DECOVALEX III project. Part 2: Effects of THM

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Numerical study of the THM effects on the near-field safety of a hypothetical nuclear waste, Germany (7) Canadian Nuclear Safety Commission (CNSC), Ottawa, Canada (8) Lawrence Berkeley National Laboratory (LBNL), Berkeley, USA (9) INERIS-LAEGO, Ecole des Mines de Nancy, Nancy, France (10) Japan Nuclear

  1. Numerical study of the THM effects on the near-field safety of a hypothetical nuclear waste repository--BMT1 of the DECOVALEX III project. Part 1: Conceptualization

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Numerical study of the THM effects on the near-field safety of a hypothetical nuclear waste on the safety of a hypothetical nuclear waste repository at the near-field and are presented in three on the safety of nuclear waste repositories. To achieve the second objective, hypothetical benchmark test

  2. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Elevator Drive Systems Energy Consumption Study Report

    E-Print Network [OSTI]

    Energy Consumption Study Report Benny ChunYin Chan University of British Columbia EECE 492 April 6th the current status of the subject matter of a project/report". #12;Elevator Drive Systems Energy Consumption Study Report April 2012 0 2012 Elevator Drive Systems Energy Consumption Study Report Benny CY Chan UBC

  3. Solid state NMR method development and studies of biological and biomimetic nanocomposites

    SciTech Connect (OSTI)

    Hu, Yanyan

    2011-02-07T23:59:59.000Z

    This thesis describes application and development of advanced solid-state nuclear magnetic resonance techniques for complex materials, in particular organic-inorganic nanocomposites and thermoelectric tellurides. The apatite-collagen interface, essential for understanding the biomineralization process in bone and engineering the interface for controlled bio-mimetic synthesis and optimized mechanical properties, is buried within the nanocomposite of bone. We used multinuclear solid-state NMR to study the composition and structure of the interface. Citrate has been identified as the main organic molecule strongly bound to the apatite surface with a density of 1/(2 nm){sup 2}, covering 1/6 of the total surface area in bovine bone. Citrate provides more carboxylate groups, one of the key functional groups found to affect apatite nucleation and growth, than all the non-collagenous proteins all together in bone; thus we propose that citrate stabilizes apatite crystals at a very small thickness of {approx}3 nm (4 unit cells) to increase bone fracture tolerance. The hypothesis has been confirmed in vitro by adding citrate in the bio-mimetic synthesis of polymerhydroxyapatite nanocomposites. The results have shown that the size of hydroxyapatite nanocrystals decreases as increasing citrate concentration. With citrate concentrations comparable to that in body fluids, similar-sized nanocrystals as in bone have been produced. Besides the dimensions of the apatite crystals, the composition of bone also affects its biofunctional and macroscopic mechanical properties; therefore, our team also extended its effort to enhance the inorganic portion in our bio-mimetic synthesis from originally 15 wt% to current 50 wt% compared to 65 wt% in bovine bone, by using Lysine-Leucine hydroxyapatite nucleating diblock co-polypeptide, which forms a gel at very low concentration. In this thesis, various advanced solid state NMR techniques have been employed to characterize nanocomposites. Meanwhile, we have developed new methods to achieve broadband high resolution NMR and improve the accuracy of inter-nuclear distance measurements involving quadrupolar spins. Broadband high resolution NMR of spin-1/2 nuclei has been accomplished by the adaptation of the magic angle turning (MAT) method to fast magic angle spinning, termed fast MAT, by solving technical problems such as off resonance effects. Fast MAT separates chemical shift anisotropy and isotropic chemical shifts over a spectral range of {approx}1.8 {gamma}B{sub 1} without significant distortions. Fast MAT {sup 125}Te NMR has been applied to study technologically important telluride materials with spectra spreading up to 190 kHz. The signal-to-noise ratio of the spectra is significantly improved by using echo-matched Gaussian filtering in offline data processing. The accuracy of the measured distances between spin-1/2 and quadrupolar nuclei with methods such as SPIDER and REAPDOR has been improved by compensating for the fast longitudinal quadrupolar relaxation on the sub-millisecond with a modified S{sub 0} pulse sequence. Also, the T1Q effect on the spin coherence and its spinning speed dependency has been explored and documented with analytical and numerical simulations as well as experimental measurements.

  4. LAB #8 Numerical Methods

    E-Print Network [OSTI]

    2005-10-20T23:59:59.000Z

    Page 1. LAB #8. Numerical Methods. Goal: The purpose of this lab is to explain how computers numerically ... Also you will examine what .... (7) Now consider the differential equation ... 3-exp(2*y)+sqrt(t)/y; (Don't forget the ; at the end.).

  5. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Allard Hall LCA Study

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA, are detailed in this report. A life cycle assessment was performed previously for this building, also;1 Executive Summary This report is the final project for CIVL 498C, Life Cycle Analysis, which is being taken

  6. Developing a Millifluidic Platform for the Synthesis of Ultrasmall Nanoclusters: Ultrasmall Copper Nanoclusters as a Case Study

    SciTech Connect (OSTI)

    Biswas, Sanchita [Louisiana State Univ., Baton Rouge, LA (United States). Center for Advanced Microstructures and Devices and Center for Atomic-level Catalysts Design; Miller, Jeffrey T. [Argonne National Lab. (ANL), Argonne, IL (United States); Li, Yuehao [Louisiana State Univ., Baton Rouge, LA (United States). Cain Dept. of Chemical Engineering; Nandakumar, Krishnaswamy [Louisiana State Univ., Baton Rouge, LA (United States). Cain Dept. of Chemical Engineering; Kumar, Challa S.S.R. [Louisiana State Univ., Baton Rouge, LA (United States). Center for Advanced Microstructures and Devices and Center for Atomic-level Catalysts Design

    2012-03-12T23:59:59.000Z

    The future of lab-on-a-chip devices for the synthesis of nanomaterials hinges on the successful development of high-throughput methods with better control over their size. While significant effort in this direction mainly focuses on developing difficult to fabricate complex microfluidic reactors, scant attention has been paid to the easy to fabricate and simple millifluidic systems that could provide the required control as well as high throughput. By utilizing numerical simulation of fluids within the millifluidic space at different flow rates, the results presented here show velocity profiles and residence time distributions similar to the case of microfluidics. By significantly reducing the residence time and residence time distribution, a continuous flow synthesis of ultrasmall copper nanoclusters (UCNCs) with exceptional colloidal stability is achieved. In-situ synchrotron-radiation-based X-ray absorption spectroscopy (XAS) reveal that the as-prepared clusters are about 1 nm, which is further supported by transmission electron microscopy and UVvis spectroscopy studies. The clusters reported here are the smallest ever produced using a lab-on-a-chip platform. When supported on silica, they are found to efficiently catalyze CH oxidation reactions, hitherto unknown to be catalyzed by Cu. This work suggests that a millifluidic platform can be an inexpensive, versatile, easy-to-use, and powerful tool for nanoparticle synthesis in general, and more specifically for ultrasmall nanoclusters (UNCs).

  7. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Travis Wade

    E-Print Network [OSTI]

    GRYPHON: LCA of electric vs. diesel all-terrain vehicles CEEN 523 December 11, 2013 999 1453 University, Development Studies (SEEDS) Student Report PROJECT GRYPHON: LCA of electric vs. diesel all-terrain vehicles ............................................................................................. 7 3 Diesel Vehicle

  8. An automatic child-directed speech detector for the study of child language development

    E-Print Network [OSTI]

    Vosoughi, Soroush

    In this paper, we present an automatic child-directed speech detection system to be used in the study of child language development. Child-directed speech (CDS) is speech that is directed by caregivers towards infants. It ...

  9. Development of a novel in vitro model to study the tryptic : endothelial cells, monocytes and flow

    E-Print Network [OSTI]

    Turjman, Alexis S. (Alexis Salomon)

    2014-01-01T23:59:59.000Z

    This thesis describes the development of a novel in vitro model of monocytes transmigration under flow and use in the study of early molecular events of atherogenesis. In this work, we focused on how endothelial dysfunction, ...

  10. UBC Social Ecological Economic Development Studies (SEEDS) Student Report ZHENGXIANG QIU

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report ZHENGXIANG QIU Life Cycle the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA of the inputs, outputs and potential impacts of the building system throughout its life cycle, being regarded

  11. The Riacho Fundo water basin: a case study for qualitative modelling sustainable development

    E-Print Network [OSTI]

    Bailey-Kellogg, Chris

    of sustainable development related problems. The models aim at supporting stakeholders to understand the systemsThe Riacho Fundo water basin: a case study for qualitative modelling sustainable development Paulo presents a working plan for modelling relevant aspects of sustainability issues in the Riacho Fundo water

  12. A Pilot Study to Evaluate Development Effort for High Performance Computing

    E-Print Network [OSTI]

    Basili, Victor R.

    1 A Pilot Study to Evaluate Development Effort for High Performance Computing Victor Basili1 the development time for programs written for high performance computers (HPC). To attack this relatively novel students in a graduate level High Performance Computing class at the University of Maryland. We collected

  13. UBC Social, Ecological Economic Development Studies (SEEDS) Student Report Social Sustainability 2

    E-Print Network [OSTI]

    UBC Social, Ecological Economic Development Studies (SEEDS) Student Report Social Sustainability 2, one closely tied to conservation. Sustainable development has been famously defined by the Brundtland The Oxford English Dictionary defines `Sustainable' as, "able to be upheld or defended; able to be maintained

  14. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Customer Awareness off and Participation in Sustainability

    E-Print Network [OSTI]

    sustainability initiatives, working with UBC Food Services and AMS Food Services to develop and conduct marketUBC Social Ecological Economic Development Studies (SEEDS) Student Report Customer Awareness off and Participation in Sustainability Mandy Cheng, Sara Harrison, Andria Lam, Cristina Machial, Lena Syrovy, Diana

  15. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Weicen Wang

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA at rob.sianchuk@gmail.com #12;Weicen Wang LIFE CYCLE ASSESSMENT - Wesbrook Building CIVL 498C November 18UBC Social Ecological Economic Development Studies (SEEDS) Student Report Weicen Wang LIFE CYCLE

  16. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Raza Jaffery

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA at rob.sianchuk@gmail.com #12;LIFE CYCLE ASSESSMENT - CENTER FOR INTERACTIVE RESEARCH ON SUSTAINABILITYUBC Social Ecological Economic Development Studies (SEEDS) Student Report Raza Jaffery LIFE CYCLE

  17. UBC Social Ecological Economic Development Studies (SEEDS) Student Report LIFE CYCLE ASSESSMENT -CENTER FOR

    E-Print Network [OSTI]

    to support the development of the field of life cycle assessment (LCA). The information and findingsUBC Social Ecological Economic Development Studies (SEEDS) Student Report JIAN SUN LIFE CYCLE which has one of the largest life cycle inventory database in North America. Assumptions and According

  18. PURPA Resource Development in the Pacific Northwest : Case Studies of Ten Electricity Generating Powerplants.

    SciTech Connect (OSTI)

    Washington State Energy Office.

    1990-07-01T23:59:59.000Z

    The case studies in this document describe the Public Utilities, Regulatory Policies Act (PURPA) development process for a variety of generating technologies. Developer interactions with regulatory agencies and power purchasers are described in some detail. Equipment, installation, and maintenance costs are identified; power marketing considerations are taken into account; and potential environmental impacts, with corresponding mitigation approaches and practices are summarized. The project development case studies were prepared by the energy agencies of the four Northwest states, under contract to the Bonneville Power Administration.

  19. Case studies of low-to-moderate temperature hydrothermal energy development

    SciTech Connect (OSTI)

    Not Available

    1981-10-01T23:59:59.000Z

    Six development projects are examined that use low- (less than 90/sup 0/C (194/sup 0/F)) to-moderate (90 to 150/sup 0/C (194 to 302/sup 0/F)) temperature geothermal resources. These projects were selected from 22 government cost-shared projects to illustrate the many facets of hydrothermal development. The case studies describe the history of this development, its exploratory methods, and its resource definition, as well as address legal, environmental, and institutional constraints. A critique of procedures used in the development is also provided and recommendations for similar future hydrothermal projects are suggested.

  20. Doing physics (studying it, or contributing to its development) entails the use of three different

    E-Print Network [OSTI]

    Schnaufer, Achim

    Doing physics (studying it, or contributing to its development) entails the use of three different facilities, which now provide the national centre for computational physics and some engage in theoretical physics, which requires little more than pen, paper and a brain in gear. Why study Physics at Edinburgh

  1. Seamless Gluing of Numerical Continuation and a Multiple Solution Method for Elliptic PDEs

    E-Print Network [OSTI]

    Kuehn, Christian

    2014-01-01T23:59:59.000Z

    Numerical continuation calculations for ordinary differential equations (ODEs) are, by now, an established tool for bifurcation analysis in dynamical systems theory as well as across almost all natural and engineering sciences. Although several excellent standard software packages are available for ODEs, there are - for good reasons - no standard numerical continuation toolboxes available for partial differential equations (PDEs), which cover a broad range of different classes of PDEs automatically. A natural approach to this problem is to look for efficient gluing computation approaches, with independent components developed by researchers in numerical analysis, dynamical systems, scientific computing and mathematical modelling. In this paper, we shall study several elliptic PDEs (Lane-Emden-Fowler, Lane-Emden-Fowler with microscopic force, Caginalp) via the numerical continuation software pde2path and develop a gluing component to determine a set of starting solutions for the continuation by exploting the v...

  2. Numerical Analysis Gordon K. Smyth

    E-Print Network [OSTI]

    Smyth, Gordon K.

    Numerical Analysis Gordon K. Smyth May 1997 Numerical analysis is concerned with the accurate discipline of numer­ ical analysis is almost entirely a product of the period since 1950 during which biostatisticians can benefit from familiarity with numerical analysis. An understanding of the numerical methods

  3. Defining the Interactions of Cellobiohydrolase with Substrate through Structure Function Studies: Cooperative Research and Development Final Report, CRADA Number CRD-10-409

    SciTech Connect (OSTI)

    Beckham, G. T.; Himmel, M. E.

    2013-07-01T23:59:59.000Z

    NREL researchers will use their expertise and skilled resources in numerical computational modeling to generate structure-function relationships for improved cellulase variant enzymes to support the development of cellulases with improved performance in biomass conversion.

  4. Analytical and numerical Gubser solutions of the second-order hydrodynamics

    E-Print Network [OSTI]

    Long-Gang Pang; Yoshitaka Hatta; Xin-Nian Wang; Bo-Wen Xiao

    2014-12-10T23:59:59.000Z

    Evolution of quark-gluon plasma (QGP) near equilibrium can be described by the second-order relativistic viscous hydrodynamic equations. Consistent and analytically verifiable numerical solutions are critical for phenomenological studies of the collective behavior of QGP in high-energy heavy-ion collisions. A novel analytical solution based on the conformal Gubser flow which is a boost-invariant solution with transverse fluid velocity is presented. It is used to verify with high precision the numerical solution with a newly developed $(3+1)$-dimensional second-order viscous hydro code (CLVisc). The perfect agreement between the analytical and numerical solutions demonstrates the reliability of the numerical simulations with the second-order viscous corrections. This lays the foundation for future phenomenological studies that allow one to gain access to the second-order transport coefficients.

  5. Disruptive Innovation in Numerical Hydrodynamics

    SciTech Connect (OSTI)

    Waltz, Jacob I. [Los Alamos National Laboratory

    2012-09-06T23:59:59.000Z

    We propose the research and development of a high-fidelity hydrodynamic algorithm for tetrahedral meshes that will lead to a disruptive innovation in the numerical modeling of Laboratory problems. Our proposed innovation has the potential to reduce turnaround time by orders of magnitude relative to Advanced Simulation and Computing (ASC) codes; reduce simulation setup costs by millions of dollars per year; and effectively leverage Graphics Processing Unit (GPU) and future Exascale computing hardware. If successful, this work will lead to a dramatic leap forward in the Laboratory's quest for a predictive simulation capability.

  6. The Statistical and Numerical Study of the Longitudinally Asymmetric Distribution of Solar Proton Events Affecting the Earth Environment of 1996-2011

    E-Print Network [OSTI]

    He, Hongqing

    2015-01-01T23:59:59.000Z

    Large solar proton events (SPEs) affect the solar-terrestrial space environment and become a very important aspect in space weather research. In this work, we statistically investigate 78 solar proton events of 1996-2011 and find that there exists a longitudinally asymmetric distribution of flare sources of the solar proton events observed near 1 AU, namely, with the same longitude separation between magnetic field line footpoint of observer and flare sources, the number of the solar proton events originating from sources located at eastern side of the nominal magnetic footpoint of observer is much larger than that of the solar proton events originating from sources located at western side. A complete model calculation of solar energetic particle (SEP) propagation in the three-dimensional Parker interplanetary magnetic field is presented to give a numerical explanation for this longitudinally asymmetric distribution phenomenon. We find that the longitudinally asymmetric distribution of solar proton events res...

  7. A study of the identification of regions in squall lines where severe storms develop

    E-Print Network [OSTI]

    Bigler, Stuart G

    1957-01-01T23:59:59.000Z

    A STUDY OF THE IDENTIFICATION OF REGIONS IN SQUALL LINES NH. ". RE SEVERE HTORNS DEVELOP A Thesis Stuart G ~ BiElsr Submitted to ths Graduate School of the AEricultural and Mechanical Cc31egs of' Texas in partial fulfillment... of the requirements for the demres of iMSTER OF SC ENCE January 1957 Na)or Subject Neteorolo A STUDY OF THE IDENT FI CATION OF RE9IONS IN S~(UALL LINES VI%RE SEVFRE ST RNS DEVELOP A T1 esis Stuart 9, Blvler Approved as to style and content bye n o orna ad...

  8. We All Share One Planet: Comparative Case Studies in Education for Sustainable Development in India

    E-Print Network [OSTI]

    Arribas Layton, Lucas

    2013-01-01T23:59:59.000Z

    for Sustainable Development, and Sustainable Developmentimportance for both development and sustainable practices insuch as: human development, sustainable human development,

  9. Venues, valences, and public policy: a study of committee bias and the development of pesticides

    E-Print Network [OSTI]

    Talbert, Jeffery Charles

    1991-01-01T23:59:59.000Z

    , pesticides, rather than individual committees. By drawing on the field of agenda setting, this paper uses a case study approach to study pesticides. From the use of policy venues, the participants testifying before all congressional hearings on pesticides... Bias Question Choosing the Proper Methods Theoretical Fundamentals of Agenda Setting Using Agenda Setting to Observe Committee Bias Expectations DEVELOPMENT OF THE PESTICIDES CONTROVERSY 2 5 10 11 15 III DATA AND ANALYSIS 30 The Public...

  10. UBC Social Ecological Economic Development Studies (SEEDS) Student Report An Investigation Into the Wheat Straw Paper

    E-Print Network [OSTI]

    pulping is the black liquor residue. Regarding the black liquor, a by-product of wheat straw pulping, Vibratory Shear Enhanced Process (VSEP) shows that lignin and hemicelluloses can be extracted from the blackUBC Social Ecological Economic Development Studies (SEEDS) Student Report An Investigation

  11. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Revealing Carbon in Hampton Place

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Revealing Carbon in Hampton Place Laiyi Chow Barry Jonat Martin Lewynsky University of British Columbia FRST 490/521C April at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about

  12. UBC Social Ecological Economic Development Studies (SEEDS) Student Report UBC Zero Waste Planning Tool

    E-Print Network [OSTI]

    recycling rate of 59%, with 43% operational waste diversion. Operational waste1 diversion targets are 70 considered: organics, mixed paper, returnable containers, cardboard, e-waste, construction materials (butUBC Social Ecological Economic Development Studies (SEEDS) Student Report UBC Zero Waste Planning

  13. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Energy & Buildings: Sustainable Strategies for Ponderosa Hub

    E-Print Network [OSTI]

    ENERGY & BUILDINGS: SUSTAINABLE STRATEGIES FOR PONDEROSA HUB #12;1 TABLE OF CONTENTS I.0 BackgroundUBC Social Ecological Economic Development Studies (SEEDS) Student Report Energy & Buildings: Sustainable Strategies for Ponderosa Hub Raphael Roy-Jauvin, Yael Haar, Hadi Kholeif, Natalia Pisarek

  14. BETA DECAY STUDIES OF 69Ni AND 58V: DEVELOPMENT OF SUBSHELL GAPS WITHIN THE

    E-Print Network [OSTI]

    Mantica, Paul F.

    BETA DECAY STUDIES OF 69Ni AND 58V: DEVELOPMENT OF SUBSHELL GAPS WITHIN THE N = 28 - 50 SHELL of the requirements for the Degree of DOCTOR OF PHILOSOPHY Department of Chemistry 2001 #12;ABSTRACT BETA DECAY for neutron-rich nuclides within the N = 28 ; 50 shell were investigated. A conventional beta detection system

  15. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Do It In The Dark

    E-Print Network [OSTI]

    , Ohio and designed the online building dashboard software used to monitor energy consumption throughUBC Social Ecological Economic Development Studies (SEEDS) Student Report Do It In The Dark: Energy Competitions as an Effective Means of Student Engagement around Energy Consumption Quinn Runkle University

  16. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Agricultural Science 450 Fence Report

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Agricultural Science 450 University of British Columbia AGSC 450 April 10, 2009 Disclaimer: "UBC SEEDS provides students Science 450 Fence Report Group 2 Alexander Changfoot Stephanie Chung Shawn Johnston Stephanie Tai Brian Wu

  17. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Moving UBC Food Outlets Beyond Climate Neutral

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Moving UBC Food Outlets ..................................................................................................................................... 27 Abstract With the increase in global energy use there has been a subsequent increase in greenhouse of qualitative interviews with key stakeholders. Key findings include the low supply of local food, the need

  18. Leadership development study :success profile competencies and high-performing leaders at Sandia National Laboratories.

    SciTech Connect (OSTI)

    Becker, Katherine M.; Mulligan, Deborah Rae; Szenasi, Gail L.; Crowder, Stephen Vernon

    2005-04-01T23:59:59.000Z

    Sandia is undergoing tremendous change. Sandia's executive management recognized the need for leadership development. About ten years ago the Business, Leadership, and Management Development department in partnership with executive management developed and implemented the organizational leadership Success Profile Competencies to help address some of the changes on the horizon such as workforce losses and lack of a skill set in the area of interpersonal skills. This study addresses the need for the Business, Leadership, and Management Development department to provide statistically sound data in two areas. One is to demonstrate that the organizational 360-degree success profile assessment tool has made a difference for leaders. A second area is to demonstrate the presence of high performing leaders at the Labs. The study utilized two tools to address these two areas. Study participants were made up of individuals who have solid data on Sandia's 360-degree success profile assessment tool. The second assessment tool was comprised of those leaders who participated in the Lockheed Martin Corporation Employee Preferences Survey. Statistical data supports the connection between leader indicators and the 360-degree assessment tool. The study also indicates the presence of high performing leaders at Sandia.

  19. Protective Wrapper Development: A Case Study Tom Anderson, Mei Feng, Steve Riddle, Alexander Romanovsky

    E-Print Network [OSTI]

    Newcastle upon Tyne, University of

    appropriate recovery actions. This paper presents results of a case study in protective wrapper development, using a Simulink model of a steam boiler system together with an OTS PID (Proportional, Integral tolerance techniques proceed by employing redundant software in some form; for example, recovery blocks, N

  20. UBC Social Ecological Economic Development Studies (SEEDS) Student Report An Investigation into Waste Reducing Vending Machine

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report An Investigation into Waste Reducing Vending Machine Pens, Pencils, and Highlighters Trent Pehlke Richard Schaap Kurt Knudson with the UBC community. The reader should bear in mind that this is a student project/report

  1. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainable Water Consumption

    E-Print Network [OSTI]

    of water consumption: drinking from the tap. The reasoning behind this is a lack of awareness and promotionUBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainable Water Water Consumption This report outlines how Sustainability Marketing practices can be used to reduce

  2. Product development with a focus on attractive product expression: an analysis of case studies

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    1 Product development with a focus on attractive product expression: an analysis of case studies products is vital for a company's endurance in competitive markets. A mix of functionality, ergonomics, aesthetics, symbols and price aspects all play a role in making a product desirable. Some products carry

  3. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sugarcane Bagasse Paper versus Wheat Straw Paper

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sugarcane Bagasse Paper Bagasse Paper versus Wheat Straw Paper prepared by Omar Omari 54434105 Marcus Cheung 82207101 Robert Chen this project to investigate and compare the advantages and disadvantages between sugarcane bagasse paper

  4. UBC Social Ecological Economic Development Studies (SEEDS) Student Report EXPLORING THE SUSTAINABILITY OF THE BARN

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report EXPLORING THE SUSTAINABILITY OF THE BARN Tabassum Firoz, Emily Kwan, Doris Lo, Cynthia Mak, Karyn Schnick, Sally Shum, Jia THE SUSTAINABILITY OF THE BARN AGSC 450 April 3, 2002 Group 12 Tabassum Firoz Emily Kwan Doris Lo Cynthia Mak Karyn

  5. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Examining the Sustainability of Lawns on Campus

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Examining the Sustainability of Lawns on Campus Emily Gray University of British Columbia GEOG 419 April 3, 2013 Disclaimer of a project/report". #12;Examining the Sustainability of Lawns on Campus Emily Gray 1 Examining

  6. Modeling the Logistics Performance in Developing Countries: An exploratory study of Moroccan context

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    1 Modeling the Logistics Performance in Developing Countries: An exploratory study of Moroccan to raise their levels of logistics performance. This article is a research progress; it presents, Technological Practices, Supply Chain performance, Morocco. 1. INTRODUCTION: Logistic in Morocco is still

  7. UBC Social Ecological Economic Development Studies (SEEDS) Student Report LIFE CYCLE ASSESSMENT OF

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA This study used Life Cycle Assessment (LCA) to assess the environmental performance of the University at rob.sianchuk@gmail.com #12;2013 CIVL498 C Ian Eddy LIFE CYCLE ASSESSMENT OF THE FOREST SCIENCE CENTER

  8. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle Assessment Report

    E-Print Network [OSTI]

    purposes. A life cycle assessment (LCA) was carried out on two of the event arenas built for the 2010UBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle AssessmentC: Life Cycle Assessment Report Thunderbird Old Arena Group Members: Dennis Fan, Sean Geyer, Hillary

  9. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Joshua Power

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA Summary This study, a life cycle assessment (LCA) of the Earth Sciences Building (ESB) serves t y o f B r i t i s h C o l u m b i a Life Cycle Assessment: Earth Sciences Building #12;ii Executive

  10. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Henrique Falck Grimm

    E-Print Network [OSTI]

    to support the development of the field of life cycle assessment (LCA). The information and findings of the Mathematics Building Henrique Falck Grimm Course: CIVL 498C Life Cycle Assessment Instructor: Rob Sianchuk of buildings, conducting a LCA study through the whole life cycle, including use and end-of-life stages

  11. Development of an Online Toolkit for Measuring Commercial Building Energy Efficiency Performance -- Scoping Study

    SciTech Connect (OSTI)

    Wang, Na

    2013-03-13T23:59:59.000Z

    This study analyzes the market needs for building performance evaluation tools. It identifies the existing gaps and provides a roadmap for the U.S. Department of Energy (DOE) to develop a toolkit with which to optimize energy performance of a commercial building over its life cycle.

  12. The development of a wind tunnel facility for the study of V/STOL noise

    E-Print Network [OSTI]

    Widnall, S. E.

    1972-01-01T23:59:59.000Z

    An open-jet wind tunnel operating within an anechoic chamber was developed for the purpose of the study of V/STOL noise mechanisms. An existing low-speed conventional hard-walled wind tunnel was modified to operate as an ...

  13. Scientist-Teacher Partnerships as Professional Development: An Action Research Study

    SciTech Connect (OSTI)

    Willcuts, Meredith H.

    2009-04-17T23:59:59.000Z

    SUBMITTED AS A DOCTORAL DISSERTATION IN COMPLETION OF REQUIREMENTS FOR THE DEGREE OF ED.D THROUGH WASHINGTON STATE UNIVERSITY. The overall purpose of this action research study was to explore the experiences of ten middle school science teachers involved in a three-year partnership program between scientists and teachers at a Department of Energy national laboratory, including the impact of the program on their professional development, and to improve the partnership program by developing a set of recommendations based on the studys findings. This action research study relied on qualitative data including field notes recorded at the summer academies and data from two focus groups with teachers and scientists. Additionally, the participating teachers submitted written reflections in science notebooks, participated in open-ended telephone interviews that were transcribed verbatim, and wrote journal summaries to the Department of Energy at the end of the summer academy. The analysis of the data, collaboratively examined by the teachers, the scientists, and the science education specialist acting as co-researchers on the project, revealed five elements critical to the success of the professional development of science teachers. First, scientist-teacher partnerships are a unique contribution to the professional development of teachers of science that is not replicated in other forms of teacher training. Second, the role of the science education specialist as a bridge between the scientists and teachers is a unique and vital one, impacting all aspects of the professional development. Third, there is a paradox for classroom teachers as they view the professional development experience from two different lenses that of learner and that of teacher. Fourth, learning for science teachers must be designed to be constructivist in nature. Fifth, the principles of the nature of science must be explicitly showcased to be seen and understood by the classroom teacher.

  14. Numerical Methods of Computational Electromagnetics for Complex Inhomogeneous Systems

    SciTech Connect (OSTI)

    Cai, Wei

    2014-05-15T23:59:59.000Z

    Understanding electromagnetic phenomena is the key in many scientific investigation and engineering designs such as solar cell designs, studying biological ion channels for diseases, and creating clean fusion energies, among other things. The objectives of the project are to develop high order numerical methods to simulate evanescent electromagnetic waves occurring in plasmon solar cells and biological ion-channels, where local field enhancement within random media in the former and long range electrostatic interactions in the latter are of major challenges for accurate and efficient numerical computations. We have accomplished these objectives by developing high order numerical methods for solving Maxwell equations such as high order finite element basis for discontinuous Galerkin methods, well-conditioned Nedelec edge element method, divergence free finite element basis for MHD, and fast integral equation methods for layered media. These methods can be used to model the complex local field enhancement in plasmon solar cells. On the other hand, to treat long range electrostatic interaction in ion channels, we have developed image charge based method for a hybrid model in combining atomistic electrostatics and continuum Poisson-Boltzmann electrostatics. Such a hybrid model will speed up the molecular dynamics simulation of transport in biological ion-channels.

  15. 2007 Wholesale Power Rate Case Initial Proposal : Wholesale Power Rate Development Study.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2007-11-01T23:59:59.000Z

    The Wholesale Power Rate Development Study (WPRDS) calculates BPA proposed rates based on information either developed in the WPRDS or supplied by the other studies that comprise the BPA rate proposal. All of these studies, and accompanying documentation, provide the details of computations and assumptions. In general, information about loads and resources is provided by the Load Resource Study (LRS), WP-07-E-BPA-01, and the LRS Documentation, WP-07-E-BPA-01A. Revenue requirements information, as well as the Planned Net Revenues for Risk (PNNR), is provided in the Revenue Requirement Study, WP-07-E-BPA-02, and its accompanying Revenue Requirement Study Documentation, WP-07-E-BPA-02A and WP-07-E-BPA-02B. The Market Price Forecast Study (MPFS), WP-07-E-BPA-03, and the MPFS Documentation, WP-07-E-BPA-03A, provide the WPRDS with information regarding seasonal and diurnal differentiation of energy rates, as well information regarding monthly market prices for Demand Rates. In addition, this study provides information for the pricing of unbundled power products. The Risk Analysis Study, WP-07-E-BPA-04, and the Risk Analysis Study Documentation, WP-07-E-BPA-04A, provide short-term balancing purchases as well as secondary energy sales and revenue. The Section 7(b)(2) Rate Test Study, WP-07-E-BPA-06, and the Section 7(b)(2) Rate Test Study Documentation, WP-07-E-BPA-06A, implement Section 7(b)(2) of the Northwest Power Act to ensure that BPA preference customers firm power rates applied to their general requirements are no higher than rates calculated using specific assumptions in the Northwest Power Act.

  16. Numerical study of the influence of applied voltage on the current balance factor of single layer organic light-emitting diodes

    SciTech Connect (OSTI)

    Lu, Fei-ping, E-mail: lufp-sysu@163.com; Liu, Xiao-bin; Xing, Yong-zhong [College of Physics and Information Science, Tianshui Normal University, Tianshui 741001 (China)

    2014-04-28T23:59:59.000Z

    Current balance factor (CBF) value, the ratio of the recombination current density and the total current density of a device, has an important function in fluorescence-based organic light-emitting diodes (OLEDs), as well as in the performance of the organic electrophosphorescent devices. This paper investigates the influence of the applied voltage of a device on the CBF value of single layer OLED based on the numerical model of a bipolar single layer OLED with organic layer trap free and without doping. Results show that the largest CBF value can be achieved when the electron injection barrier (?{sub n}) is equal to the hole injection barrier (?{sub p}) in the lower voltage region at any instance. The largest CBF in the higher voltage region can be achieved in the case of ?{sub n}?>??{sub p} under the condition of electron mobility (?{sub 0n}) > hole mobility (?{sub 0p}), whereas the result for the case of ?{sub 0n}?

  17. A NUMERICAL STUDY OF NOCTURNAL WAVELIKE MOTION IN XINZHANG HU1, XUHUI LEE1, , DAVID E. STEVENS2 and RONALD B. SMITH3

    E-Print Network [OSTI]

    Lee, Xuhui

    . STEVENS2 and RONALD B. SMITH3 1School of Forestry and Environmental Studies, Yale University, Connecticut

  18. Numerical investigation of a transient free jet resembling a laser-produced vapor jet

    E-Print Network [OSTI]

    Budair, Mohammed Omar

    Numerical investigation of a transient free jet resembling a laser-produced vapor jet G.M. Arshed in revised form 29 July 2003 Abstract In the present study, the transiently developing free jet emanating from a laser-impacted surface is considered. The jet velocity profiles are varied with time

  19. Individual Development Plan (IDP) for PhD Studies The aim of undertaking PhD studies is to prove one's ability to perform in-depth scientific

    E-Print Network [OSTI]

    Steinhoff, Heinz-Jrgen

    1 Individual Development Plan (IDP) for PhD Studies Preamble The aim of undertaking PhD studies-motivation on the part of the PhD student. Agreements between PhD students and their supervisors on planning and developing the PhD phase can offer structure, also raising transparency and predictability. This development

  20. A RANS/DES Numerical Procedure for Axisymmetric Flows with and without Strong Rotation

    SciTech Connect (OSTI)

    Andrade, A J

    2007-10-30T23:59:59.000Z

    A RANS/DES numerical procedure with an extended Lax-Wendroff control-volume scheme and turbulence model is described for the accurate simulation of internal/external axisymmetric flow with and without strong rotation. This new procedure is an extension, from Cartesian to cylindrical coordinates, of (1) a second order accurate multi-grid, control-volume integration scheme, and (2) a k-{omega} turbulence model. This paper outlines both the axisymmetric corrections to the mentioned numerical schemes and the developments of techniques pertaining to numerical dissipation, multi-block connectivity, parallelization, etc. Furthermore, analytical and experimental case studies are presented to demonstrate accuracy and computational efficiency. Notes are also made toward numerical stability of highly rotational flows.

  1. Numerical and experimental analyses of resin infusion manufacturing processes of composite materials

    E-Print Network [OSTI]

    Wang, Peng; Molimard, Jrme; Vautrin, Alain; Minni, Jean-Christophe; 10.1177/0021998311421990

    2012-01-01T23:59:59.000Z

    Liquid resin infusion (LRI) processes are promising manufacturing routes to produce large, thick, or complex structural parts. They are based on the resin flow induced, across its thickness, by a pressure applied onto a preform/resin stacking. However, both thickness and fiber volume fraction of the final piece are not well controlled since they result from complex mechanisms which drive the transient mechanical equilibrium leading to the final geometrical configuration. In order to optimize both design and manufacturing parameters, but also to monitor the LRI process, an isothermal numerical model has been developed which describes the mechanical interaction between the deformations of the porous medium and the resin flow during infusion.1, 2 With this numerical model, it is possible to investigate the LRI process of classical industrial part shapes. To validate the numerical model, first in 2D, and to improve the knowledge of the LRI process, this study details a comparison between numerical simulations and...

  2. Journal of Power Sources 140 (2005) 331339 Numerical study of a flat-tube high power density solid oxide fuel cell

    E-Print Network [OSTI]

    2005-01-01T23:59:59.000Z

    ) solid oxide fuel cell (SOFC) is a new design developed by Siemens Westinghouse, based on their formerly.V. All rights reserved. Keywords: Flat-tube; High power density; Solid oxide fuel cell; Simulation; Heat oxide fuel cell Part I. Heat/mass transfer and fluid flow Yixin Lu1, Laura Schaefer, Peiwen Li2

  3. Study of fully developed, liquid-metal, open-channel flow in a nearly coplanar magnetic field

    SciTech Connect (OSTI)

    Morley, N.B.; Abdou, M.A. [Univ. of California, Los Angeles, CA (United States)

    1997-03-01T23:59:59.000Z

    Fully developed, gravity-driven flow in an open channel of arbitrary electrical conductance and orientation to an applied magnetic field is investigated. The formulation of the model equations and the numerical solution methodology are described in detail. Numerical solutions of the model equations for the flow velocity profile, induced magnetic field profile, and the uniform film height as a function of Hartmann number, field angle, flow rate, and channel conductivity are presented and discussed. The parameter ranges explored are those most representative of tokamak divertor surface protection schemes, where the field is predominantly coplanar in orientation. The formation of jets in velocity and the occurrence of abrupt jumps in uniform film height are seen as the wall conductance increases. Regimes where the flow is dominated by the smaller transverse field component instead of the larger coplanar field are also observed. Simple analytic relations predicting the film height are given for the different flow regimes. 13 refs., 14 figs., 1 tab.

  4. Development and Applications Of Photosensitive Device Systems To Studies Of Biological And Organic Materials

    SciTech Connect (OSTI)

    Gruner, Sol

    2012-01-20T23:59:59.000Z

    The primary focus of the grant is the development of new x-ray detectors for biological and materials work at synchrotron sources, especially Pixel Array Detectors (PADs), and the training of students via research applications to problems in biophysics and materials science using novel x-ray methods. This Final Progress Report provides a high-level overview of the most important accomplishments. These major areas of accomplishment include: (1) Development and application of x-ray Pixel Array Detectors; (2) Development and application of methods of high pressure x-ray crystallography as applied to proteins; (3) Studies on the synthesis and structure of novel mesophase materials derived from block co-polymers.

  5. Direct numerical simulation of turbulent reacting flows

    SciTech Connect (OSTI)

    Chen, J.H. [Sandia National Laboratories, Livermore, CA (United States)

    1993-12-01T23:59:59.000Z

    The development of turbulent combustion models that reflect some of the most important characteristics of turbulent reacting flows requires knowledge about the behavior of key quantities in well defined combustion regimes. In turbulent flames, the coupling between the turbulence and the chemistry is so strong in certain regimes that is is very difficult to isolate the role played by one individual phenomenon. Direct numerical simulation (DNS) is an extremely useful tool to study in detail the turbulence-chemistry interactions in certain well defined regimes. Globally, non-premixed flames are controlled by two limiting cases: the fast chemistry limit, where the turbulent fluctuations. In between these two limits, finite-rate chemical effects are important and the turbulence interacts strongly with the chemical processes. This regime is important because industrial burners operate in regimes in which, locally the flame undergoes extinction, or is at least in some nonequilibrium condition. Furthermore, these nonequilibrium conditions strongly influence the production of pollutants. To quantify the finite-rate chemistry effect, direct numerical simulations are performed to study the interaction between an initially laminar non-premixed flame and a three-dimensional field of homogeneous isotropic decaying turbulence. Emphasis is placed on the dynamics of extinction and on transient effects on the fine scale mixing process. Differential molecular diffusion among species is also examined with this approach, both for nonreacting and reacting situations. To address the problem of large-scale mixing and to examine the effects of mean shear, efforts are underway to perform large eddy simulations of round three-dimensional jets.

  6. Agua Caliente Solar Feasibility and Pre-Development Study Final Report

    SciTech Connect (OSTI)

    Carolyn T. Stewart, Managing Partner; Red Mountain Energy Partners

    2011-04-26T23:59:59.000Z

    Evaluation of facility- and commercial-scale solar energy projects on the Agua Caliente Band of Cahuilla Indians Reservation in Palm Springs, CA. The Agua Caliente Band of Cahuilla Indians (ACBCI) conducted a feasibility and pre-development study of potential solar projects on its lands in southern California. As described below, this study as a logical and necessary next step for ACBCI. Support for solar project development in California, provided through the statewide California Solar Initiative (CSI), its Renewable Portfolio Standard and Feed-in Tariff Program, and recently announced Reverse Auction Mechanism, provide unprecedented support and incentives that can be utilized by customers of California's investor-owned utilities. Department of Energy (DOE) Tribal Energy Program funding allowed ACBCI to complete its next logical step to implement its Strategic Energy Plan, consistent with its energy and sustainability goals.

  7. ToHajiilee Economic Development, Inc.(TEDI) Feasibility Study for Utility-Scale Solar

    SciTech Connect (OSTI)

    Burpo, Rob

    2012-02-29T23:59:59.000Z

    To??Hajiilee Economic Development, Inc. (TEDI) is the economic development entity representing the ToHajiilee Chapter of the Navajo Nation, also known as the Ca??oncito Band of Navajo (CBN). Using DOE funding, TEDI assembled a team of qualified advisors to conduct a feasibility study for a utility-scale 30 MW Photovoltaic (PV) solar power generation facility on TEDI trust lands. The goal for this project has been to gather information and practical business commitments to successfully complete the feasibility analysis. The TEDI approach was to successively make informed decisions to select an appropriate technology best suited to the site, determine environmental viability of the site, secure options for the sale of generated power, determine practicality of transmission and interconnection of power to the local grid, and secure preliminary commitments on project financing. The feasibility study has been completed and provides TEDI with a practical understanding of its business options in moving forward with developing a solar project on CBN tribal lands. Funding from DOE has allowed TEDI and its team of professional advisors to carefully select technology and business partners and build a business model to develop this utility-scale solar project. As a result of the positive feasibility findings, TEDI is moving forward with finalizing all pre-construction activities for its major renewable energy project.

  8. Economic development through biomass systems integration: US Energy Department feasibility studies

    SciTech Connect (OSTI)

    Downing, M. [ORNL, TN (United States); Bain, R.; Overend, R. [NREL, Golden, CO (United States)

    1996-12-31T23:59:59.000Z

    The broad objectives of {open_quotes}Economic Development Through Biomass Systems Integration{close_quotes} projects were to promote the development of integrated biomass production and conversion technologies, and to evaluate the potential for early implementation of cost-shared field demonstrations or pre-commercial developments of integrated systems in anticipation of future joint ventures to commercialize these systems. Specifically, these feasibility studies were to determine the technical, environmental, and economic viability of implementing integrated systems that would lead to planting tree and grass crops to serve as dedicated feedstock supply systems, and the scale-up of conversion technologies for producing liquid biofuels, and electric power that would use the dedicated feedstock supply systems. Some of the final reports are slated to published and available through the National Renewable Energy Laboratory. Because of space constraints we present brief summaries of 9 of the studies. Further demonstration and scale-up after completion of these feasibility studies will enhance our understanding of the economics and policy of energy, agriculture and environment at local, regional and national scales.

  9. 11. NUMERICAL TECHNIQUES 1 Numerical identification of effective multipole

    E-Print Network [OSTI]

    Boyer, Edmond

    11. NUMERICAL TECHNIQUES 1 Numerical identification of effective multipole moments of polarizable of the induced multipole moments. A general multipole theory is available in the literature, however, only linear multipole model is usually exploited when determining numerically these effective moments. Since this axial

  10. Development of a Rubber-Based Product Using a Mixture Experiment: A Challenging Case Study

    SciTech Connect (OSTI)

    Kaya, Yahya; Piepel, Gregory F.; Caniyilmaz, Erdal

    2013-07-01T23:59:59.000Z

    Many products used in daily life are made by blending two or more components. The properties of such products typically depend on the relative proportions of the components. Experimental design, modeling, and data analysis methods for mixture experiments provide for efficiently determining the component proportions that will yield a product with desired properties. This article presents a case study of the work performed to develop a new rubber formulation for an o-ring (a circular gasket) with requirements specified on 10 product properties. Each step of the study is discussed, including: 1) identifying the objective of the study and requirements for properties of the o-ring, 2) selecting the components to vary and specifying the component constraints, 3) constructing a mixture experiment design, 4) measuring the responses and assessing the data, 5) developing property-composition models, 6) selecting the new product formulation, and 7) confirming the selected formulation in manufacturing. The case study includes some challenging and new aspects, which are discussed in the article.

  11. 2007 Wholesale Power Rate Case Initial Proposal : Wholesale Power Rate Development Study Documentation.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration

    2005-11-01T23:59:59.000Z

    The Documentation for Wholesale Power Rate Development Study (WPRDS) shows the details of the calculation of the proposed rates. It contains the source data, the calculation, and the results. Section 1 contains an overview of the information used and developed in the various models used in the rate development process. Section 2 contains the documentation of the Rate Analysis Model (RAM2007). The RAM2007 is a group of computer applications that performs most of the computations that determine BPA's proposed rates. The output tables of RAM2007 show the source data, calculations (in sequence), and the results (rate charges) of the rate development process. Section 3 provides documentation of revenue forecasts for the 3-year rate test period FY 2007 through FY 2009 at both current and proposed rates and at current rates for the period immediately preceding the rate test period. Section 4 includes supporting data for rate calculations not performed in RAM2007 or revenue analyses. Each section draws data from difference sources and thus tables and/or charts are not always numbered in sequence. For purposes of this document, omitted tables will be listed as such in the Table of Contents.

  12. 2007 Wholesale Power Rate Case Final Proposal : Wholesale Power Rate Development Study Documentation, Volume 2.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2006-07-01T23:59:59.000Z

    The Documentation for Wholesale Power Rate Development Study shows the details of the calculation of the proposed rates. It contains the source data, the calculation, and the results. There are 2 Volumes, the first containing Sections 1, 2, and 3; the second containing Section 4 and 3 appendices. Section 1 contains an overview of the information used and developed in the various models used in the rate development process. Section 2 contains the documentation of the Rate Analysis Model (RAM2007). The RAM2007 is a group of computer applications that performs most of the computations that determine BPA's proposed rates. The output tables of RAM2007 show the source data, calculations (in sequence), and the results (rate charges) of the rate development process. Section 3 provides documentation of revenue forecasts for the three-year rate test period FY 2007 through FY 2009 at both current and proposed rates and at current rates for the period immediately preceding the rate test period. Section 4 includes supporting data for rate calculations not performed in RAM2007 or revenue analyses.

  13. Market definition study of photovoltaic power for remote villages in developing countries

    SciTech Connect (OSTI)

    Ragsdale, C.; Quashie, P.

    1980-10-01T23:59:59.000Z

    The objective of this market definition study is to assess the market potential for the use of photovoltaic power systems for remote villages in developing countries. The approach used was to conduct an in-depth literature search followed by in-country surveys of selected developing countries in Africa, the Middle East, Southeast Asia, and Latin America. The purpose of these surveys was to determine the current energy situation in these countries, the level of rural electrification activity, their knowledge and interest in solar and specifically photovoltaics, their financial resource capability, and the probability of development of a market for photovoltaics based on these and other factors. Findings are presented. The conclusion reached by the survey is that there is a significant market potential for photovoltaics in village power applications in developing countries. Extrapolation of the number of unelectrified villages results in an estimated potential of as much as 20,000 MWp, a potential similar in magnitude to previous UN and World Bank estimates. Recommendations for market stimulation are presented. (WHK)

  14. Study and Development of Anti-Islanding Control for Synchronous Machine-Based Distributed Generators: November 2001--March 2004

    SciTech Connect (OSTI)

    Ye, Z.

    2006-03-01T23:59:59.000Z

    This report summarizes the study and development of new active anti-islanding control schemes for synchronous machine-based distributed generators, including engine generators and gas turbines.

  15. Simulating Reionization in Numerical Cosmology

    E-Print Network [OSTI]

    Aaron Sokasian; Tom Abel; Lars E. Hernquist

    2001-05-10T23:59:59.000Z

    The incorporation of radiative transfer effects into cosmological hydrodynamical simulations is essential for understanding how the intergalactic medium (IGM) makes the transition from a neutral medium to one that is almost fully ionized. Here, we present an approximate numerical method designed to study in a statistical sense how a cosmological density field is ionized by a set of discrete point sources. A diffuse background radiation field is also computed self-consistently in our procedure. The method requires relatively few time steps and can be employed with simulations having high resolution. We describe the details of the algorithm and provide a description of how the method can be applied to the output from a pre-existing cosmological simulation to study the systematic reionization of a particular ionic species. As a first application, we compute the reionization of He II by quasars in the redshift range 3 to 6.

  16. Numerical Analysis Gordon K. Smyth

    E-Print Network [OSTI]

    Smyth, Gordon K.

    Numerical Analysis Gordon K. Smyth in Encyclopedia of Biostatistics (ISBN 0471 975761) Edited by Peter Armitage and Theodore Colton John Wiley & Sons, Ltd, Chichester, 1998 #12;Numerical Analysis Numerical analysis is concerned with the accurate and efficient evalua- tion of mathematical expressions

  17. Dynamical Spacetimes from Numerical Hydrodynamics

    E-Print Network [OSTI]

    Allan Adams; Nathan Benjamin; Arvin Moghaddam; Wojciech Musial

    2014-11-07T23:59:59.000Z

    We numerically construct dynamical asymptotically-AdS$_4$ metrics by evaluating the fluid/gravity metric on numerical solutions of dissipative hydrodynamics in (2+1) dimensions. The resulting numerical metrics satisfy Einstein's equations in (3+1) dimensions to high accuracy.

  18. We All Share One Planet: Comparative Case Studies in Education for Sustainable Development in India

    E-Print Network [OSTI]

    Arribas Layton, Lucas

    2013-01-01T23:59:59.000Z

    and Education for Sustainable Development. Policy Futures inEducation for Sustainable Development (2005-2015). Connect,Education for Sustainable Development: Need for Teacher

  19. Mercury Speciation in Coal-Fired Power Plant Flue Gas-Experimental Studies and Model Development

    SciTech Connect (OSTI)

    Radisav Vidic; Joseph Flora; Eric Borguet

    2008-12-31T23:59:59.000Z

    The overall goal of the project was to obtain a fundamental understanding of the catalytic reactions that are promoted by solid surfaces present in coal combustion systems and develop a mathematical model that described key phenomena responsible for the fate of mercury in coal-combustion systems. This objective was achieved by carefully combining laboratory studies under realistic process conditions using simulated flue gas with mathematical modeling efforts. Laboratory-scale studies were performed to understand the fundamental aspects of chemical reactions between flue gas constituents and solid surfaces present in the fly ash and their impact on mercury speciation. Process models were developed to account for heterogeneous reactions because of the presence of fly ash as well as the deliberate addition of particles to promote Hg oxidation and adsorption. Quantum modeling was used to obtain estimates of the kinetics of heterogeneous reactions. Based on the initial findings of this study, additional work was performed to ascertain the potential of using inexpensive inorganic sorbents to control mercury emissions from coal-fired power plants without adverse impact on the salability fly ash, which is one of the major drawbacks of current control technologies based on activated carbon.

  20. Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate-Scale Hydrodynamic Model

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Khangaonkar, Tarang; Labiosa, Rochelle G.; Kim, Taeyun

    2010-11-30T23:59:59.000Z

    The Washington State Department of Ecology contracted with Pacific Northwest National Laboratory to develop an intermediate-scale hydrodynamic and water quality model to study dissolved oxygen and nutrient dynamics in Puget Sound and to help define potential Puget Sound-wide nutrient management strategies and decisions. Specifically, the project is expected to help determine 1) if current and potential future nitrogen loadings from point and non-point sources are significantly impairing water quality at a large scale and 2) what level of nutrient reductions are necessary to reduce or dominate human impacts to dissolved oxygen levels in the sensitive areas. In this study, an intermediate-scale hydrodynamic model of Puget Sound was developed to simulate the hydrodynamics of Puget Sound and the Northwest Straits for the year 2006. The model was constructed using the unstructured Finite Volume Coastal Ocean Model. The overall model grid resolution within Puget Sound in its present configuration is about 880 m. The model was driven by tides, river inflows, and meteorological forcing (wind and net heat flux) and simulated tidal circulations, temperature, and salinity distributions in Puget Sound. The model was validated against observed data of water surface elevation, velocity, temperature, and salinity at various stations within the study domain. Model validation indicated that the model simulates tidal elevations and currents in Puget Sound well and reproduces the general patterns of the temperature and salinity distributions.

  1. 2007 Wholesale Power Rate Case Final Proposal : Wholesale Power Rate Development Study.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2006-07-01T23:59:59.000Z

    The Wholesale Power Rate Development Study (WPRDS) serves two primary purposes. It synthesizes information supplied by the other final studies that comprise the BPA rate proposal and shows the actual calculations for BPA's power rates. In addition, the WPRDS is the primary source for certain information used in establishing the power rates. Information developed in the WPRDS includes rate design (including seasonal and diurnal shapes for energy rates, demand, and load variance rates), the risk mitigation tools (Cost Recovery Adjustment Clause (CRAC), along with the [N]ational Marine Fisheries Service [F]ederal Columbia River Power System [B]iological Opinion (NFB) Adjustment, the Emergency NFB Surcharge, and Dividend Distribution Clause (DDC)), development of the Slice rate, and all discounts and other adjustments that are included in the rate schedules and the General Rate Schedule Provisions. The WPRDS also includes the description of the methodology for the Cost of Service Analysis (COSA), and the various rate design steps necessary to establish BPA's power rates. The WPRDS also shows the calculations for inter-business line revenues and expenses, the revenue forecast and, finally, includes a description of all of the rate schedules. The actual rate schedules are shown in ''Administrator's Final Record of Decision (ROD), Appendix A: 2007 Wholesale Power Rate Schedules and General Rate Schedule Provisions, WP-07-A-02''. The WPRDS also includes the Partial Resolution of Issues, shown in Attachment 1 of the ROD. The Partial Resolution of Issues affected many of the features described in this study. These are noted where appropriate.

  2. Development of prototype guidelines for risk management against terror attack in the tourism industry: a Delphi study

    E-Print Network [OSTI]

    Smith, Clifford Keith

    2007-09-17T23:59:59.000Z

    The purpose of the study was to gather strategies and factors from tourism security professionals from which terrorism risk management policies can be developed. This study utilized the Delphi method in order to provide ...

  3. Problem definition study of subsidence caused by geopressured geothermal resource development

    SciTech Connect (OSTI)

    Not Available

    1980-12-01T23:59:59.000Z

    The environmental and socio-economic settings of four environmentally representative Gulf Coast geopressured geothermal fairways were inventoried. Subsidence predictions were prepared using feasible development scenarios for the four representative subsidence sites. Based on the results of the subsidence estimates, an assessment of the associated potential environmental and socioeconomic impacts was prepared. An inventory of mitigation measures was also compiled. Results of the subsidence estimates and impact assessments are presented, as well as conclusions as to what are the major uncertainties, problems, and issues concerning the future study of geopressured geothermal subsidence.

  4. Development of a particle injection system for impurity transport study in KSTAR

    SciTech Connect (OSTI)

    Lee, H. Y.; Hong, Joohwan; Lee, Seung Hun; Jang, Siwon; Jang, Juhyeok; Jeon, Taemin; Park, Jae Sun; Choe, Wonho, E-mail: wchoe@kaist.ac.kr [Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701 (Korea, Republic of); Hong, Suk-Ho [National Fusion Research Institute, Daejeon 305-806 (Korea, Republic of)

    2014-11-15T23:59:59.000Z

    A solid particle injection system is developed for KSTAR. The system has a compact size, compatibility with a strong magnetic field and high vacuum environment, and the capability to inject a small amount of solid particles with a narrow injection angle. The target flight-distance of 10 cm has been achieved with a particle loss rate of less than 10%. Solid impurity particles such as tungsten and carbon will be injected by this system at the midplane in KSTAR. The impurity transport feature will be studied with a soft X-ray array, a vacuum ultra-violet diagnostic, and Stand Alone Non-Corona code.

  5. The Danube Delta Biosphere Reserve: a Case Study for Qualitative Modeling of Sustainable Development

    E-Print Network [OSTI]

    Bailey-Kellogg, Chris

    We present progress towards developing a qualitative reasoning model of sustainable development's Strategy for Sustainable Development (SSD) that call for increasing participation in the process of making decisions that affect sustainable development (SD), stakeholders, decision makers, and citizens must gain

  6. UBC Social Ecological Economic Development Studies (SEEDS) Student Report The Sustainability of UBC Food System Collaborative Project II

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report The Sustainability of UBC, indicators were developed to assess the sustainability of the food system. Furthermore, we developed of a project/report". #12;The Sustainability of UBC Food System Collaborative Project II Group Three

  7. Renewable Energy Feasibility Study Leading to Development of the Native Spirit Solar Energy Facility

    SciTech Connect (OSTI)

    Carolyn Stewart; Tracey LeBeau

    2008-01-31T23:59:59.000Z

    DOE-funded renewable energy feasibility study conducted by Red Mountain Tribal Energy on behalf of the Southwest Tribal Energy Consortium (SWTEC). During the course of the study, SWTEC members considered multiple options for the organization structure, selected a proposed organization structure, and drafted a Memorandum of Understanding for the SWTEC organization. High-level resource assessments for SWTEC members were completed; surveys were developed and completed to determine each members interest in multiple participation options, including on-reservation projects. With the survey inputs in mind, multiple energy project options were identified and evaluated on a high-level basis. That process led to a narrowing of the field of technology options to solar generation, specifically, utility-scale Concentrating Solar-Powered Generation projects, with a specific, tentative project location identified at the Fort Mojave Indian Reservation -- the Native Spirit Solar Energy Facility.

  8. Conceptual modular description of the high-level waste management system for system studies model development

    SciTech Connect (OSTI)

    McKee, R.W.; Young, J.R.; Konzek, G.J.

    1992-08-01T23:59:59.000Z

    This document presents modular descriptions of possible alternative components of the federal high-level radioactive waste management system and the procedures for combining these modules to obtain descriptions for alternative configurations of that system. The 20 separate system component modules presented here can be combined to obtain a description of any of the 17 alternative system configurations (i.e., scenarios) that were evaluated in the MRS Systems Studies program (DOE 1989a). First-approximation descriptions of other yet-undefined system configurations could also be developed for system study purposes from this database. The descriptions include, in a modular format, both functional descriptions of the processes in the waste management system, plus physical descriptions of the equipment and facilities necessary for performance of those functions.

  9. Development of an entrained flow gasifier model for process optimization study

    SciTech Connect (OSTI)

    Biagini, E.; Bardi, A.; Pannocchia, G.; Tognotti, L. [Consorzio Pisa Ric, Pisa (Italy). Div Energia Ambiente

    2009-10-15T23:59:59.000Z

    Coal gasification is a versatile process to convert a solid fuel in syngas, which can be further converted and separated in hydrogen, which is a valuable and environmentally acceptable energy carrier. Different technologies (fixed beds, fluidized beds, entrained flow reactors) are used, operating under different conditions of temperature, pressure, and residence time. Process studies should be performed for defining the best plant configurations and operating conditions. Although 'gasification models' can be found in the literature simulating equilibrium reactors, a more detailed approach is required for process analysis and optimization procedures. In this work, a gasifier model is developed by using AspenPlus as a tool to be implemented in a comprehensive process model for the production of hydrogen via coal gasification. It is developed as a multizonal model by interconnecting each step of gasification (preheating, devolatilization, combustion, gasification, quench) according to the reactor configuration, that is in entrained flow reactor. The model removes the hypothesis of equilibrium by introducing the kinetics of all steps and solves the heat balance by relating the gasification temperature to the operating conditions. The model allows to predict the syngas composition as well as quantity the heat recovery (for calculating the plant efficiency), 'byproducts', and residual char. Finally, in view of future works, the development of a 'gasifier model' instead of a 'gasification model' will allow different reactor configurations to be compared.

  10. STUDY OF THE DEVELOPMENT OF SHELL CLOSURES AT N=32,34 AND APPROACHES TO SUB-SEGMENT

    E-Print Network [OSTI]

    Glasmacher, Thomas

    .A. Brown, J. Linneman, S.D. Mahanti, B. Pope and B. Sher- rill for serving in my PhD Guidance Committee. Dr understanding of what I was studying. Chris Campbell helped me on the detector development study. Our long. Brown developed the theoretical models and calculations for the energies and reduced transition

  11. West Valley high-level nuclear waste glass development: a statistically designed mixture study

    SciTech Connect (OSTI)

    Chick, L.A.; Bowen, W.M.; Lokken, R.O.; Wald, J.W.; Bunnell, L.R.; Strachan, D.M.

    1984-10-01T23:59:59.000Z

    The first full-scale conversion of high-level commercial nuclear wastes to glass in the United States will be conducted at West Valley, New York, by West Valley Nuclear Services Company, Inc. (WVNS), for the US Department of Energy. Pacific Northwest Laboratory (PNL) is supporting WVNS in the design of the glass-making process and the chemical formulation of the glass. This report describes the statistically designed study performed by PNL to develop the glass composition recommended for use at West Valley. The recommended glass contains 28 wt% waste, as limited by process requirements. The waste loading and the silica content (45 wt%) are similar to those in previously developed waste glasses; however, the new formulation contains more calcium and less boron. A series of tests verified that the increased calcium results in improved chemical durability and does not adversely affect the other modeled properties. The optimization study assessed the effects of seven oxide components on glass properties. Over 100 melts combining the seven components into a wide variety of statistically chosen compositions were tested. Viscosity, electrical conductivity, thermal expansion, crystallinity, and chemical durability were measured and empirically modeled as a function of the glass composition. The mathematical models were then used to predict the optimum formulation. This glass was tested and adjusted to arrive at the final composition recommended for use at West Valley. 56 references, 49 figures, 18 tables.

  12. Government-promoted collective research and development in Japan: Analyses of the organization through case studies

    SciTech Connect (OSTI)

    Hane, G.J.

    1990-06-01T23:59:59.000Z

    A study was commissioned by the Energy Conservation and Utilization Technologies (ECUT) Program of the US Department of Energy (DOE) to better understand the strategies used for cooperative and joint-venture research and development (R D) overseas. The study evaluates the organization and management of several different types of cooperative R D programs in Japan that are sponsored under the Ministry of International Trade and Industry (MITI) Program, Exploratory Research for Advanced Technology (ERATO) Program, and the Key Technology Center (KTC) Program. The ERATO Program grew out of a concern over revising the government's approach to supporting research and technology development. The program was initiated to address what was regarded as a lack of creativity in areas at the forefront of science. The program recruits young researchers and allows them flexibility to explore multi-disciplinary areas at the forefront of science. It has been organized to allow for individual creativity but at the same time to benefit from the combined knowledge of an assembly of researchers. Because the plan is such a radical departure from conventional Japanese philosophy, it has met with certain bureaucratic obstacles. Visits to four ERATO projects are described. The third program, the KTC Program, focuses on getting private firms to venture into risky areas of advanced technology to pave the way for future industries. Its goal is to encourage a shift of resources in the private sector toward areas that are considered essential for the competitive development of future industries. The principal philosophy behind the KTC is that the private sector is in the best position to identify promising technical challenges and to weigh their commercial potential against research uncertainties. Three KTC research joint ventures are briefly described. 13 refs., 9 figs., 35 tabs.

  13. The development of a sensitive method to study volatile organic compounds in gaseous emissions of lung cancer cell lines

    E-Print Network [OSTI]

    Maroly, Anupam

    2005-08-29T23:59:59.000Z

    THE DEVELOPMENT OF A SENSITIVE METHOD TO STUDY VOLATILE ORGANIC COMPOUNDS IN GASEOUS EMISSIONS OF LUNG CANCER CELL LINES A Thesis by ANUPAM MAROLY Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2005 Major Subject: Biomedical Engineering THE DEVELOPMENT OF A SENSITIVE METHOD TO STUDY VOLATILE ORGANIC COMPOUNDS IN GASEOUS EMISSIONS OF LUNG CANCER CELL...

  14. Numerical and experimental investigation of vortical flow-flame interaction

    SciTech Connect (OSTI)

    Najm, H.N.; Schefer, R.W.; Milne, R.B.; Mueller, C.J. [Sandia National Labs., Livermore, CA (United States); Devine, K.D.; Kempka, S.N. [Sandia National Labs., Albuquerque, NM (United States)

    1998-02-01T23:59:59.000Z

    A massively parallel coupled Eulerian-Lagrangian low Mach number reacting flow code is developed and used to study the structure and dynamics of a forced planar buoyant jet flame in two dimensions. The numerical construction uses a finite difference scheme with adaptive mesh refinement for solving the scalar conservation equations, and the vortex method for the momentum equations, with the necessary coupling terms. The numerical model construction is presented, along with computational issues regarding the parallel implementation. An experimental acoustically forced planar jet burner apparatus is also developed and used to study the velocity and scalar fields in this flow, and to provide useful data for validation of the computed jet. Burner design and laser diagnostic details are discussed, along with the measured laboratory jet flame dynamics. The computed reacting jet flow is also presented, with focus on both large-scale outer buoyant structures and the lifted flame stabilization dynamics. A triple flame structure is observed at the flame base in the computed flow, as is theoretically expected, but was not observable with present diagnostic techniques in the laboratory flame. Computed and experimental results are compared, along with implications for model improvements.

  15. The Momotombo Geothermal Field, Nicaragua: Exploration and development case history study

    SciTech Connect (OSTI)

    None

    1982-07-01T23:59:59.000Z

    This case history discusses the exploration methods used at the Momotombo Geothermal Field in western Nicaragua, and evaluates their contributions to the development of the geothermal field models. Subsequent reservoir engineering has not been synthesized or evaluated. A geothermal exploration program was started in Nicaragua in 1966 to discover and delineate potential geothermal reservoirs in western Nicaragua. Exploration began at the Momotombo field in 1970 using geological, geochemical, and geophysical methods. A regional study of thermal manifestations was undertaken and the area on the southern flank of Volcan Momotombo was chosen for more detailed investigation. Subsequent exploration by various consultants produced a number of geotechnical reports on the geology, geophysics, and geochemistry of the field as well as describing production well drilling. Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. This report presents the description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development. Our principal finding is that data developed at each stage were not sufficiently integrated to guide further work at the field, causing inefficient use of resources.

  16. Development of a free boundary Tokamak Equilibrium Solver (TES) for Advanced Study of Tokamak Equilibria

    E-Print Network [OSTI]

    Jeon, Y M

    2015-01-01T23:59:59.000Z

    A free-boundary Tokamak Equilibrium Solver (TES), developed for advanced study of tokamak equilibra, is described with two distinctive features. One is a generalized method to resolve the intrinsic axisymmetric instability, which is encountered after all in equilibrium calculation with a free-boundary condition. The other is an extension to deal with a new divertor geometry such as snowflake or X divertors. For validations, the uniqueness of a solution is confirmed by the independence on variations of computational domain, the mathematical correctness and accuracy of equilibrium profiles are checked by a direct comparison with an analytic equilibrium known as a generalized Solovev equilibrium, and the governing force balance relation is tested by examining the intrinsic axisymmetric instabilities. As a valuable application, a snowflake equilibrium that requires a second order zero of the poloidal magnetic field is discussed in the circumstance of KSTAR coil system.

  17. Science/art - art/science: case studies of the development of a professional art product

    SciTech Connect (OSTI)

    Sesko, S.C.; Marchant, M.

    1997-02-24T23:59:59.000Z

    Objective was to follow the cognitive and creative processes demonstrated by student research participants as they integrated a developing knowledge of ``big`` science, as practiced at LLNL, into a personal and idiosyncratic visual, graphical, or multimedia product. The participants, all non-scientists, involved in this process, attended a series of design classes, sponsored by LLNL at the Art Center College of Design in Pasadena CA. As a result of this study, we have become interested in the possibility of similar characteristics between scientists and artists. We have also become interested in the different processes that can be used to teach science to non-scientists, so that they are able to understand and portray scientific information.

  18. http://www.ogj.com/articles/print/volume-111/issue-8/drilling-production/study-develops-decline-analysis-geologic.html BARNETT SHALE MODEL-1: Study develops decline analysis,

    E-Print Network [OSTI]

    Patzek, Tadeusz W.

    ogj.com http://www.ogj.com/articles/print/volume-111/issue-8/drilling . Study approach The BEG study examines production data f rom all individual wells drilled 1995 to be drilled under various economic scenarios. The result is an unprecedented, comprehensive view of the f ield

  19. Low-rank-coal study national needs for resource development. Volume 1. Executive summary

    SciTech Connect (OSTI)

    Elliot, Dr., Martin A.; Hill, George R.; Jonakin, James; Crutchfield, Paul W.; Severson, Donald E.; White, David M.; Yeager, Kurt

    1980-11-01T23:59:59.000Z

    Low-rank coals - lignite and subbituminous - are those which have been subjected to the least amount of metamorphic change during the coal-forming process. As such, they retain greater fractions of moisture and volatile matter from the original peat material, and contain less fixed carbon, than the high-rank coals - bituminous and anthracite. The primary measure used to classify the lower ranks of coal is heating value. Other important characteristics which distinguish the low-rank coals from high-rank coals are discussed in this report. Low-rank coals represent a major, and largely untapped, energy resource for this country. Very extensive deposits of lignite and subbituminous coal exist in the western states, the Gulf coast, and Alaska. Major deposits of low-rank coal are also found in many other countries, most notably the USSR, Australia, Canada, and the central and eastern European nations. Worldwide coal statistics indicate that low-rank coals account for roughly one-third of the total resource and current production tonnages. This report recommends a comprehensive national research, development, and demonstration (RD and D) program to enhance the development of low-rank coals. The major conclusion of this study is that the unique properties of these coals affect the technologies for their extraction, preparation, direct use, and conversion and justify a separate focus on low-rank coals in the national RD and D efforts.

  20. Analytic and numerical study of underwater implosion

    E-Print Network [OSTI]

    Gish, Lynn Andrew

    2013-01-01T23:59:59.000Z

    Underwater implosion, the rapid collapse of a structure caused by external pressure, generates a pressure pulse in the surrounding water that is potentially damaging to adjacent structures or personnel. Understanding the ...

  1. Theoretical and numerical studies of chaotic mixing

    E-Print Network [OSTI]

    Kim, Ho Jun

    2008-10-10T23:59:59.000Z

    defined using the same quadrature/collocation points [12]. SEM combines geometrical flexibility of the finite element method (FEM) with spectral convergence and low phase/dissipation error of the spectral method. For SEM it is assumed that the solution... of computational efficiency this basis is typically chosen to be orthogonal in a weighted inner-product. Convergence to the exact solution is achieved by increasing the order of the elements or the number of elements. If the boundary condition and 3 solution...

  2. Research Article Numerical Study of Membrane Configurations

    E-Print Network [OSTI]

    Iglic, Ales

    , Kasprzaka 44/52, 01-224 Warsaw, Poland Correspondence should be addressed to Luka Mesarec; mesarec of the curvature energy were used to obtain the shapes of the vesicles. The shapes of the vesicles and their energy of topological defects on vesicles obtained by the minimization of the spontaneous curvature energy. 1

  3. NUMERICAL STUDIES OF ~MPURITIES IN FUSION PLASMAS*

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy: GridTruck PlatooningJefferson Labteleconference AprilBrian19 17

  4. Numerical Modeling of HCCI Combustion

    Broader source: Energy.gov (indexed) [DOE]

    Numerical Modeling of HCCI Combustion Salvador M. Aceves, Daniel L. Flowers, J. Ray Smith, Joel Martinez-Frias, Francisco Espinosa-Loza, Tim Ross, Bruce Buchholz, Nick...

  5. Numerical analysis of kinematic soil-pile interaction

    SciTech Connect (OSTI)

    Castelli, Francesco; Maugeri, Michele [Department of Civil and Environmental Engineering, University of Catania, Viale Andrea Doria no. 6, 95125, Catania (Italy); Mylonakis, George [Department of Civil Engineering, University of Patras, Rio GR-26500, Patras (Greece)

    2008-07-08T23:59:59.000Z

    In the present study, the response of singles pile to kinematic seismic loading is investigated using the computer program SAP2000. The objectives of the study are: (1) to develop a numerical model that can realistically simulate kinematic soil-structure interaction for piles accounting for discontinuity conditions at the pile-soil interface, energy dissipation and wave propagation; (2) to use the model for evaluating kinematic interaction effects on pile response as function of input ground motion; and (3) to present a case study in which theoretical predictions are compared with results obtained from other formulations. To evaluate the effects of kinematic loading, the responses of both the free-field soil (with no piles) and the pile were compared. Time history and static pushover analyses were conducted to estimate the displacement and kinematic pile bending under seismic loadings.

  6. NumericalS imulation of Cooling Gas Injection Using

    E-Print Network [OSTI]

    NumericalS imulation of Cooling Gas Injection Using Adaptive Multiscale Techniques Wolfgang Dahmen words:fi nite volume method,fi lm cooling, cooling gas injection, multiscale techniques, grid adaptation#ciency is investigated. Keywords: Finite Volum Method,Film cooling, Cooling gas injection, Multiscale techniques, Grid

  7. Development and application of QM/MM methods to study the solvation effects and surfaces

    SciTech Connect (OSTI)

    Dibya, Pooja Arora

    2010-05-16T23:59:59.000Z

    Quantum mechanical (QM) calculations have the advantage of attaining high-level accuracy, however QM calculations become computationally inefficient as the size of the system grows. Solving complex molecular problems on large systems and ensembles by using quantum mechanics still poses a challenge in terms of the computational cost. Methods that are based on classical mechanics are an inexpensive alternative, but they lack accuracy. A good trade off between accuracy and efficiency is achieved by combining QM methods with molecular mechanics (MM) methods to use the robustness of the QM methods in terms of accuracy and the MM methods to minimize the computational cost. Two types of QM combined with MM (QM/MM) methods are the main focus of the present dissertation: the application and development of QM/MM methods for solvation studies and reactions on the Si(100) surface. The solvation studies were performed using a discreet solvation model that is largely based on first principles called the effective fragment potential method (EFP). The main idea of combining the EFP method with quantum mechanics is to accurately treat the solute-solvent and solvent-solvent interactions, such as electrostatic, polarization, dispersion and charge transfer, that are important in correctly calculating solvent effects on systems of interest. A second QM/MM method called SIMOMM (surface integrated molecular orbital molecular mechanics) is a hybrid QM/MM embedded cluster model that mimics the real surface.3 This method was employed to calculate the potential energy surfaces for reactions of atomic O on the Si(100) surface. The hybrid QM/MM method is a computationally inexpensive approach for studying reactions on larger surfaces in a reasonably accurate and efficient manner. This thesis is comprised of four chapters: Chapter 1 describes the general overview and motivation of the dissertation and gives a broad background of the computational methods that have been employed in this work. Chapter 2 illustrates the methodology of the interface of the EFP method with the configuration interaction with single excitations (CIS) method to study solvent effects in excited states. Chapter 3 discusses the study of the adiabatic electron affinity of the hydroxyl radical in aqueous solution and in micro-solvated clusters using a QM/EFP method. Chapter 4 describes the study of etching and diffusion of oxygen atom on a reconstructed Si(100)-2 x 1 surface using a hybrid QM/MM embedded cluster model (SIMOMM). Chapter 4 elucidates the application of the EFP method towards the understanding of the aqueous ionization potential of Na atom. Finally, a general conclusion of this dissertation work and prospective future direction are presented in Chapter 6.

  8. Multiscale numerical methods for some types of parabolic equations

    E-Print Network [OSTI]

    Nam, Dukjin

    2009-05-15T23:59:59.000Z

    method. The goal of the second problem is to develop efficient multiscale numerical techniques for solving turbulent diffusion equations governed by celluar flows. The solution near the separatrices can be approximated by the solution of a system of one...

  9. Development of an ultrasonic pulse-echo (UPE) technique for aircraft icing studies

    SciTech Connect (OSTI)

    Liu, Yang; Hu, Hui [Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011 (United States); Chen, Wen-Li [Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011 (United States); School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090 (China); Bond, Leonard J. [Department of Aerospace Engineering, Iowa State University, 2271 Howe Hall, Room 1200, Ames, IA 50011 (United States); Center for Nondestructive Evaluation, Iowa State University, 1915 Scholl Road, 151 ASC II, Ames, IA 50011 (United States)

    2014-02-18T23:59:59.000Z

    Aircraft operating in some cold weather conditions face the risk of icing. Icing poses a threat to flight safety and its management is expensive. Removing light frost on a clear day from a medium-size business jet can cost $300, heavy wet snow removal can cost $3,000 and removal of accumulated frozen/freezing rain can cost close to $10,000. Understanding conditions that lead to severe icing events is important and challenging. When an aircraft or rotorcraft flies in a cold climate, some of the super cooled droplets impinging on exposed aircraft surfaces may flow along the surface prior to freezing and give various forms and shapes of ice. The runback behavior of a water film on an aircraft affects the morphology of ice accretion and the rate of formation. In this study, we report the recent progress to develop an Ultrasonic Pulse-Echo (UPE) technique to provide real-time thickness distribution measurements of surface water flows driven by boundary layer airflows for aircraft icing studies. A series of initial experimental investigations are conducted in an ice wind tunnel employing an array of ultrasonic transducers placed underneath the surface of a flat plate. The water runback behavior on the plate is evaluated by measuring the thickness profile variation of the water film along the surface by using the UPE technique under various wind speed and flow rate conditions.

  10. Subtask 2.2 - Creating A Numerical Technique for Microseismic Data Inversion

    SciTech Connect (OSTI)

    Anastasia Dobroskok; Yevhen Holubnyak; James Sorensen

    2009-05-01T23:59:59.000Z

    Geomechanical and geophysical monitoring are the techniques which can complement each other and provide enhancement in the solutions of many problems of geotechnical engineering. One of the most promising geophysical techniques is passive seismic monitoring. The essence of the technique is recording the acoustic signals produced in the subsurface, either naturally or in response to human activity. The acoustic signals are produced by mechanical displacements on the contacts of structural elements (e.g., faults, boundaries of rock blocks, natural and induced fractures). The process can be modeled by modern numerical techniques developed in geomechanics. The report discusses a study that was aimed at the unification of the passive seismic monitoring and numerical modeling for the monitoring of the hydraulic fracture propagation. The approach adopted in the study consisted of numerical modeling of the seismicity accompanying hydraulic fracture propagation and defining seismic attributes and patterns characterizing the process and fracture parameters. Numerical experiments indicated that the spatial distribution of seismic events is correlated to geometrical parameters of hydrofracture. Namely, the highest density of the events is observed along fracture contour, and projection of the events to the fracture plane makes this effect most pronounced. The numerical experiments also showed that dividing the totality of the events into groups corresponding to the steps of fracture propagation allows for reconstructing the geometry of the resulting fracture more accurately than has been done in the majority of commercial applications.

  11. Development of techniques in magnetic resonance and structural studies of the prion protein

    SciTech Connect (OSTI)

    Bitter, Hans-Marcus L.

    2000-07-01T23:59:59.000Z

    Magnetic resonance is the most powerful analytical tool used by chemists today. Its applications range from determining structures of large biomolecules to imaging of human brains. Nevertheless, magnetic resonance remains a relatively young field, in which many techniques are currently being developed that have broad applications. In this dissertation, two new techniques are presented, one that enables the determination of torsion angles in solid-state peptides and proteins, and another that involves imaging of heterogenous materials at ultra-low magnetic fields. In addition, structural studies of the prion protein via solid-state NMR are described. More specifically, work is presented in which the dependence of chemical shifts on local molecular structure is used to predict chemical shift tensors in solid-state peptides with theoretical ab initio surfaces. These predictions are then used to determine the backbone dihedral angles in peptides. This method utilizes the theoretical chemicalshift tensors and experimentally determined chemical-shift anisotropies (CSAs) to predict the backbone and side chain torsion angles in alanine, leucine, and valine residues. Additionally, structural studies of prion protein fragments are described in which conformationally-dependent chemical-shift measurements were made to gain insight into the structural differences between the various conformational states of the prion protein. These studies are of biological and pathological interest since conformational changes in the prion protein are believed to cause prion diseases. Finally, an ultra-low field magnetic resonance imaging technique is described that enables imaging and characterization of heterogeneous and porous media. The notion of imaging gases at ultra-low fields would appear to be very difficult due to the prohibitively low polarization and spin densities as well as the low sensitivities of conventional Faraday coil detectors. However, Chapter 5 describes how gas imaging at ultra-low fields is realized by incorporating the high sensitivities of a dc superconducting quantum interference device (SQUID) with the high polarizations attainable through optica11y pumping {sup 129}Xe gas.

  12. Powder River Basin Coalbed Methane Development and Produced Water Management Study

    SciTech Connect (OSTI)

    Advanced Resources International

    2002-11-30T23:59:59.000Z

    Coalbed methane resources throughout the entire Powder River Basin were reviewed in this analysis. The study was conducted at the township level, and as with all assessments conducted at such a broad level, readers must recognize and understand the limitations and appropriate use of the results. Raw and derived data provided in this report will not generally apply to any specific location. The coal geology in the basin is complex, which makes correlation with individual seams difficult at times. Although more than 12,000 wells have been drilled to date, large areas of the Powder River Basin remain relatively undeveloped. The lack of data obviously introduces uncertainty and increases variability. Proxies and analogs were used in the analysis out of necessity, though these were always based on sound reasoning. Future development in the basin will make new data and interpretations available, which will lead to a more complete description of the coals and their fluid flow properties, and refined estimates of natural gas and water production rates and cumulative recoveries. Throughout the course of the study, critical data assumptions and relationships regarding gas content, methane adsorption isotherms, and reservoir pressure were the topics of much discussion with reviewers. A summary of these discussion topics is provided as an appendix. Water influx was not modeled although it is acknowledged that this phenomenon may occur in some settings. As with any resource assessment, technical and economic results are the product of the assumptions and methodology used. In this study, key assumptions as well as cost and price data, and economic parameters are presented to fully inform readers. Note that many quantities shown in various tables have been subject to rounding; therefore, aggregation of basic and intermediate quantities may differ from the values shown.

  13. ForCent model development and testing using the Enriched Background Isotope Study experiment

    SciTech Connect (OSTI)

    Parton, W.J.; Hanson, P. J.; Swanston, C.; Torn, M.; Trumbore, S. E.; Riley, W.; Kelly, R.

    2010-10-01T23:59:59.000Z

    The ForCent forest ecosystem model was developed by making major revisions to the DayCent model including: (1) adding a humus organic pool, (2) incorporating a detailed root growth model, and (3) including plant phenological growth patterns. Observed plant production and soil respiration data from 1993 to 2000 were used to demonstrate that the ForCent model could accurately simulate ecosystem carbon dynamics for the Oak Ridge National Laboratory deciduous forest. A comparison of ForCent versus observed soil pool {sup 14}C signature ({Delta} {sup 14}C) data from the Enriched Background Isotope Study {sup 14}C experiment (1999-2006) shows that the model correctly simulates the temporal dynamics of the {sup 14}C label as it moved from the surface litter and roots into the mineral soil organic matter pools. ForCent model validation was performed by comparing the observed Enriched Background Isotope Study experimental data with simulated live and dead root biomass {Delta} {sup 14}C data, and with soil respiration {Delta} {sup 14}C (mineral soil, humus layer, leaf litter layer, and total soil respiration) data. Results show that the model correctly simulates the impact of the Enriched Background Isotope Study {sup 14}C experimental treatments on soil respiration {Delta} {sup 14}C values for the different soil organic matter pools. Model results suggest that a two-pool root growth model correctly represents root carbon dynamics and inputs to the soil. The model fitting process and sensitivity analysis exposed uncertainty in our estimates of the fraction of mineral soil in the slow and passive pools, dissolved organic carbon flux out of the litter layer into the mineral soil, and mixing of the humus layer into the mineral soil layer.

  14. The Numerical Simulation of Turbulence

    E-Print Network [OSTI]

    W. Schmidt

    2007-12-06T23:59:59.000Z

    In this contribution, I give an overview of the various approaches toward the numerical modelling of turbulence, particularly, in the interstellar medium. The discussion is placed in a physical context, i. e. computational problems are motivated from basic physical considerations. Presenting selected examples for solutions to these problems, I introduce the basic ideas of the most commonly used numerical methods.

  15. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainable Transportation: UBC Athletic Events as an agent of change

    E-Print Network [OSTI]

    Inter-Faculty Cup ­ Athletics and Sustainable Campus Living ExpoUBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainable from dan-dare.org Sustainable Transportation: UBC Athletic Events as an agent of change Erin Brophy

  16. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Demand Side Strategies for Energy Efficiency in University of British Columbia

    E-Print Network [OSTI]

    of a project/report". #12;DEMAND&SIDE)STRATEGIES)FOR)ENERGY)EFFICIENCY) INUBC Social Ecological Economic Development Studies (SEEDS) Student Report Demand Side Strategies for Energy Efficiency in University of British Columbia Residences Jennifer Clark, Nate Croft, Liam Fast

  17. Blood, sweat and tears : a case study of the development of cultured red blood cells for transfusion

    E-Print Network [OSTI]

    King, Emma Katharine

    2013-11-27T23:59:59.000Z

    This thesis is an in-depth case study of an interdisciplinary, paradigm breaking, research team who are seeking to develop cultured red blood cells (RBCs) for transfusion using stem cells (known as the BloodPharma project). ...

  18. UBC Social Ecological Economic Development Studies (SEEDS) Student Report The UBC Food System: Indicators in the Measurement of Sustainability The

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report The UBC Food System: Indicators in the Measurement of Sustainability The Sustainability of UBC Food System Collaborative Project System: Indicators in the Measurement of Sustainability The Sustainability of UBC Food System

  19. UBC Social Ecological Economic Development Studies (SEEDS) Student Report The Sustainability Of The Ubc Food System: Collaborative Project II

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report The Sustainability asked to develop a model to assess the sustainability of the UBC Food System. Specifically, we have to of a project/report". #12;1 THE SUSTAINABILITY OF THE UBC FOOD SYSTEM: COLLABORATIVE PROJECT II Agricultural

  20. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle Assessment of UBC Faculty of Pharmaceutical Sciences Building

    E-Print Network [OSTI]

    which aims to support the development of the field of life cycle assessment (LCA). The informationUBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle Assessment.sianchuk@gmail.com #12;2 | P a g e Life Cycle Assessment of UBC Faculty of Pharmaceutical Sciences Building CIVL 498E

  1. THE NUMERICAL APPROXIMATION FOR THE INTEGRABILITY PROBLEM AND THE MEASURE OF WELFARE CHANGES, AND ITS APPLICATIONS

    E-Print Network [OSTI]

    Lim, Sung Jin

    2012-01-01T23:59:59.000Z

    This dissertation mainly studied on numerical approximation methods as a solution of the integrability problem and the measure of welfare changes, and demonstrated how numerical algorithms can be applied in empirical studies ...

  2. Waterfront developments in the Middle East case study : the Golden Horn Project, Istanbul, Turkey

    E-Print Network [OSTI]

    Alamuddin, Hana S. (Hana Slieman)

    1987-01-01T23:59:59.000Z

    This thesis examines waterfront developments in the Middle East . It concentrates on the Golden Horn project in Istanbul as it raises a number of issues that are central to any such development in that region. In order for ...

  3. Liquid Phase Methanol LaPorte Process Development Unit: Modification, operation, and support studies

    SciTech Connect (OSTI)

    Not Available

    1990-08-31T23:59:59.000Z

    A gas phase and a slurry phase radioactive tracer study was performed on the 12 ton/day Liquid Phase Methanol (LPMEOH) Process Development Unit (PDU) in LaPorte, Texas. To study the gas phase mixing characteristics, a radioactive argon tracer was injected into the feed gas and residence time distribution was generated by measuring the response at the reactor outlet. Radioactive manganese oxide powder was independently injected into the reactor to measure the slurry phase mixing characteristics. A tanks-in-series model and an axial dispersion model were applied to the data to characterize the mixing in the reactor. From the axial dispersion model, a translation to the number of CSTR's (continuous stirred tank reactors) was made for comparison purposes with the first analysis. Dispersion correlations currently available in the literature were also compared. The tanks-in-series analysis is a simpler model whose results are easily interpreted. However, it does have a few drawbacks; among them, the lack of a reliable method for scaleup of a reactor and no direct correlation between mixing in the slurry and gas phases. The dispersion model allows the mixing in the gas and slurry phases to be characterized separately while including the effects of phase transfer. This analysis offers a means for combining the gas and slurry phase dispersion models into an effective dispersion coefficient, which, in turn, can be related to an equivalent number of tanks-in-series. The dispersion methods reported are recommended for scaleup of a reactor system. 24 refs., 18 figs., 8 tabs.

  4. Municipal solid waste management challenges in developing countries - Kenyan case study

    SciTech Connect (OSTI)

    Henry, Rotich K. [College of Environment and Resources, Jilin University, Changchun 130026 (China); Zhao Yongsheng [College of Environment and Resources, Jilin University, Changchun 130026 (China)]. E-mail: zhaoyongsheng@jlu.edu.cn; Dong Jun [College of Environment and Resources, Jilin University, Changchun 130026 (China)

    2006-07-01T23:59:59.000Z

    This paper provides an overview of the state of municipal solid waste management (MSWM) by local authorities in Kenya as a case study of a low-income developing country. Approaches of possible solutions that can be undertaken to improve municipal solid waste (MSW) services are discussed. Poor economic growth (1.1% in 1993) has resulted in an increase in the poverty level which presently stands at 56%. Migration from the rural areas to the urban areas has resulted in unplanned settlements in suburban areas accommodating about 60% of the urban population on only 5% urban land area. Political interference also hampers smooth running of local authorities. Vulnerability of pollution of surface and groundwater is high because local authorities rarely considered environmental impact in siting MSW disposal sites. Illegal dumping of MSW on the river banks or on the roadside poses environmental and economic threats on nearby properties. Poor servicing of MSW collection vehicles, poor state of infrastructure and the lack of adequate funding militate against optimization of MSW disposal service. The rural economy needs to be improved if rural-urban migration is to be managed. Involvement of stakeholders is important to achieve any meaningful and sustainable MSWM. The role of the informal sector through community-based organizations (CBOs), Non-Governmental Organizations (NGOs) and the private sector in offering solutions towards improvement of MSWM also is explored.

  5. A Prospective Cohort Study on Radiation-induced Hypothyroidism: Development of an NTCP Model

    SciTech Connect (OSTI)

    Boomsma, Marjolein J.; Bijl, Hendrik P.; Christianen, Miranda E.M.C.; Beetz, Ivo; Chouvalova, Olga; Steenbakkers, Roel J.H.M. [Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Laan, Bernard F.A.M. van der [Department of Otorhinolaryngology/Head and Neck Surgery, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Wolffenbuttel, Bruce H.R. [Department of Endocrinology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands)] [Department of Endocrinology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Oosting, Sjoukje F. [Department of Medical Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands)] [Department of Medical Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Schilstra, Cornelis [Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands)] [Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands); Langendijk, Johannes A., E-mail: j.a.langendijk@umcg.nl [Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, Groningen (Netherlands)

    2012-11-01T23:59:59.000Z

    Purpose: To establish a multivariate normal tissue complication probability (NTCP) model for radiation-induced hypothyroidism. Methods and Materials: The thyroid-stimulating hormone (TSH) level of 105 patients treated with (chemo-) radiation therapy for head-and-neck cancer was prospectively measured during a median follow-up of 2.5 years. Hypothyroidism was defined as elevated serum TSH with decreased or normal free thyroxin (T4). A multivariate logistic regression model with bootstrapping was used to determine the most important prognostic variables for radiation-induced hypothyroidism. Results: Thirty-five patients (33%) developed primary hypothyroidism within 2 years after radiation therapy. An NTCP model based on 2 variables, including the mean thyroid gland dose and the thyroid gland volume, was most predictive for radiation-induced hypothyroidism. NTCP values increased with higher mean thyroid gland dose (odds ratio [OR]: 1.064/Gy) and decreased with higher thyroid gland volume (OR: 0.826/cm{sup 3}). Model performance was good with an area under the curve (AUC) of 0.85. Conclusions: This is the first prospective study resulting in an NTCP model for radiation-induced hypothyroidism. The probability of hypothyroidism rises with increasing dose to the thyroid gland, whereas it reduces with increasing thyroid gland volume.

  6. Laboratory Experiments and Instrument Development for the Study of Atmospheric Aerosols

    SciTech Connect (OSTI)

    Davidovits, Paul

    2011-12-10T23:59:59.000Z

    Soot particles are generated by incomplete combustion of fossil and biomass fuels. Through direct effects clear air aerosols containing black carbon (BC) such as soot aerosols, absorb incoming light heating the atmosphere, while most other aerosols scatter light and produce cooling. Even though BC represents only 1-2% of the total annual emissions of particulate mass to the atmosphere, it has been estimated that the direct radiative effect of BC is the second-most important contributor to global warming after absorption by CO2. Ongoing studies continue to underscore the climate forcing importance of black carbon. However, estimates of the radiative effects of black carbon on climate remain highly uncertain due to the complexity of particles containing black carbon. Quantitative measurement of BC is challenging because BC often occurs in highly non-spherical soot particles of complex morphology. Freshly emitted soot particles are typically fractal hydrophobic aggregates. The aggregates consist of black carbon spherules with diameters typically in the range of about 15-40 nm, and they are usually coated by adsorbed polyaromatic hydrocarbons (PAHs) produced during combustion. Diesel-generated soot particles are often emitted with an organic coating composed primarily of lubricating oil and unburned fuel, as well as well as PAH compounds. Sulfuric acid has also been detected in diesel and aircraft-emitted soot particles. In the course of aging, these particle coatings may be substantially altered by chemical reactions and/or the deposition of other materials. Such processes transform the optical and CCN properties of the soot aerosols in ways that are not yet well understood. Our work over the past seven years consisted of laboratory research, instrument development and characterization, and field studies with the central focus of improving our understanding of the black carbon aerosol climate impacts. During the sixth year as well as during this seventh year (no-cost extension period) of our grant, we extended our studies to perform experiments on the controlled production and characterization of secondary organic aerosol.

  7. Buoyant melting instabilities beneath extending lithosphere: 1. Numerical models

    E-Print Network [OSTI]

    Tackley, Paul J.

    Buoyant melting instabilities beneath extending lithosphere: 1. Numerical models John W. Hernlund,1,2 Paul J. Tackley,1,3 and David J. Stevenson4 Received 18 November 2006; revised 18 October 2007 diffusely extending lithosphere is studied using numerical convection models covering a wide range

  8. Richard # 9501 EXPERIMENTAL AND NUMERICAL ANALYSIS OF CORROSION-

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Richard # 9501 Page 1/9 EXPERIMENTAL AND NUMERICAL ANALYSIS OF CORROSION- INDUCED COVER CRACKING to present both experimental and numerical studies of the corrosion induced cracking pattern evolution of a reinforced concrete sample subjected to accelerated corrosion. The sample was a concrete beam (1000x250x100

  9. NUMERICAL INVESTIGATION OF CAVITATION IN MULTI-DIMENSIONAL COMPRESSIBLE FLOWS

    E-Print Network [OSTI]

    NUMERICAL INVESTIGATION OF CAVITATION IN MULTI-DIMENSIONAL COMPRESSIBLE FLOWS KRISTEN J. DEVAULT, cavitation, pseudospectral AMS subject classifications. 35Q30, 65M70, 76N99 1. Introduction. A long to first make a careful numerical study of the simplest possible scenario where one could expect cavitation

  10. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Energy Conservation and Behaviour Change Opportunities at UBC

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Energy Conservation of this were used to recommend how best to motivate staff to decrease their energy conservation consumption and empirical studies of behaviour change and energy conservation was undertaken to better understand

  11. Development of a precise size-controllable pellet injector for the detailed studies of ablation phenomena and mechanism

    E-Print Network [OSTI]

    Boyer, Edmond

    Development of a precise size-controllable pellet injector for the detailed studies of ablation, pellet injection experiments have been actively carried out in many toroidal devices in the sense. In order to have a common measure of pellet ablation, the regression study has been performed

  12. National mission on biodiesel: a study of science, development and policy processes in India

    E-Print Network [OSTI]

    Hirvonen, Maija

    2009-01-01T23:59:59.000Z

    Biofuel has caught the imagination of countries worldwide as a tool for providing energy security, advancing rural development, promoting environmental sustainability, mitigating climate change, and enhancing international ...

  13. Numerical Chladni figures

    E-Print Network [OSTI]

    Mller, Thomas

    2013-01-01T23:59:59.000Z

    Chladni patterns of vibrating membranes or thin plates faszinated the people already in the eighteenth century. As a simple way to visualize acoustic phenomena it is a valuable experiment for beginners' courses. In this paper I present NumChladni, an interactive tool for studying arbitrary two-dimensional vibrating membranes based on the Finite Element method. I also describe the straightforward approach of the underlying mathematical details and give some examples. NumChladni is directly applicable in the undergraduate classroom as, for example, complementary application to experimental setups.

  14. PLUTO: a Numerical Code for Computational Astrophysics

    E-Print Network [OSTI]

    A. Mignone; G. Bodo; S. Massaglia; T. Matsakos; O. Tesileanu; C. Zanni; A. Ferrari

    2007-03-12T23:59:59.000Z

    We present a new numerical code, PLUTO, for the solution of hypersonic flows in 1, 2 and 3 spatial dimensions and different systems of coordinates. The code provides a multi-physics, multi-algorithm modular environment particularly oriented towards the treatment of astrophysical flows in presence of discontinuities. Different hydrodynamic modules and algorithms may be independently selected to properly describe Newtonian, relativistic, MHD or relativistic MHD fluids. The modular structure exploits a general framework for integrating a system of conservation laws, built on modern Godunov-type shock-capturing schemes. Although a plethora of numerical methods has been successfully developed over the past two decades, the vast majority shares a common discretization recipe, involving three general steps: a piecewise polynomial reconstruction followed by the solution of Riemann problems at zone interfaces and a final evolution stage. We have checked and validated the code against several benchmarks available in literature. Test problems in 1, 2 and 3 dimensions are discussed.

  15. Development of analytical techniques to study H2s poisoning of PEMFCs and components

    SciTech Connect (OSTI)

    Brosha, Eric L [Los Alamos National Laboratory; Rockward, Tommy [Los Alamos National Laboratory; Uribe, Francisco A [Los Alamos National Laboratory; Garzon, Fernando H [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Polymer electrolyte membrane fuel cells are sensitive to impurities that may be present in either the oxidizer or fuel. H{sub 2}S, even at the ppb level, will have a dramatic and adverse affect on fuel cell performance. Not only is it important to know a particular material's affinity to adsorb H{sub 2}S, when considering materials for PEMFC applications, issues such as permeation and crossover rates also become extremely important Several experimental methods have been developed to quantify H{sub 2}S adsorption onto surfaces and to quantify H{sub 2}S permeation through Nafion(reg.) membranes using readily available and inexpensive Ag/AgS ion probes. In addition to calculating the H{sub 2}S uptake on commonly used XC-72 carbon supports and PtlXC-72 catalysts, the H{sub 2}S permeability through dry and humidified Nafion(reg.) PEMFC membranes was also studied using these specialized techniques. In each ion probe experiment performed, a sulfide anti-oxidant buffer solution was used to trap and concentrate trace quantities of H{sub 2}S during the course of the measurement. Crossover experiments were conducted for up to 24 hours in order to achieve sulfide ion concentrations high enough to be precisely determined by subsequent titration with Pb(NO{sub 3}){sub 2}. By using these techniques, we have confirmed H{sub 2}S crossover in Nafion(reg.) membranes and have calculated preliminary rates of H{sub 2}S crossover.

  16. Suggestions for dealership development to suit needs of a new kind of John Deere customer: a study of

    E-Print Network [OSTI]

    Pospeshnova, Maria Alexandrovna

    2006-08-16T23:59:59.000Z

    SUGGESTIONS FOR DEALERSHIP DEVELOPMENT TO SUIT NEEDS OF A NEW KIND OF JOHN DEERE CUSTOMER: A STUDY OF ?LARGE PROPERTY OWNERS? AND THEIR PREFERENCES A Thesis by MARIA ALEXANDROVNA POSPESHNOVA Submitted to the Office of Graduate... DEERE CUSTOMER: A STUDY OF ?LARGE PROPERTY OWNERS? AND THEIR PREFERENCES A Thesis by MARIA ALEXANDROVNA POSPESHNOVA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  17. Suggestions for dealership development to suit needs of a new kind of John Deere customer: a study of

    E-Print Network [OSTI]

    Pospeshnova, Maria Alexandrovna

    2006-08-16T23:59:59.000Z

    SUGGESTIONS FOR DEALERSHIP DEVELOPMENT TO SUIT NEEDS OF A NEW KIND OF JOHN DEERE CUSTOMER: A STUDY OF ?LARGE PROPERTY OWNERS? AND THEIR PREFERENCES A Thesis by MARIA ALEXANDROVNA POSPESHNOVA Submitted to the Office of Graduate... DEERE CUSTOMER: A STUDY OF ?LARGE PROPERTY OWNERS? AND THEIR PREFERENCES A Thesis by MARIA ALEXANDROVNA POSPESHNOVA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  18. Development of Open Source Software for Power Market Research: An Illustrative Case Study

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    to penetrate the power industry; heavy reliance is still placed on closed-source commercial software packages in the software industry, such as for language development tools (e.g., NetBeans for Java), office document, Ames, IA 50011 USA. OSS is now widely used in the software industry, such as for language development

  19. Public service impacts of geothermal development: cumulative impacts study of the Geysers KGRA. Final staff report

    SciTech Connect (OSTI)

    Matthews, K.M.

    1983-07-01T23:59:59.000Z

    The number of workers currently involved in the various aspects of geothermal development in the Geysers are identified. Using two different development scenarios, projections are made for the number of power plants needed to reach the electrical generation capacity of the steam resource in the Geysers. The report also projects the cumulative number of workers needed to develop the steam field and to construct, operate, and maintain these power plants. Although the number of construction workers fluctuates, most are not likely to become new, permanent residents of the KGRA counties. The administrative and public service costs of geothermal development to local jurisdications are examined, and these costs are compared to geothermal revenues accruing to the local governments. Revenues do not cover the immediate fiscal needs resulting from increases in local road maintenance and school enrollment attributable to geothermal development. Several mitigation options are discussed and a framework presented for calculating mitigation costs for school and road impacts.

  20. Study of the influential leaders, power structure, community decisions, and geothermal energy development in Imperial County, California

    SciTech Connect (OSTI)

    Butler, E.W.; Hall, C.H.; Pick, J.B.

    1980-04-01T23:59:59.000Z

    The economy of Imperial County, California, is now dominated by agriculture, but economic studies indicate that the emerging geothermal sector could grow to a size comparable to that of agriculture. The purpose of this study is to discover the kind of power structure operating in Imperial County, the influential leaders, the source of their power, their probable reactions to geothermal development, and the possible effects geothermal development will have on the power structure. Several social science research methods are used to identify the influential leaders and to describe the power structure in Imperial County. An analysis of the opinions of leadership and the public shows the likely response to geothermal development. The power structure analysis, combined with forecasts of the economic effects of geothermal development, indicates the ways in which the power structure itself may change.

  1. Cumulative impacts study of The Geysers KGRA: public-service impacts of geothermal development

    SciTech Connect (OSTI)

    Matthews, K.M.

    1982-05-01T23:59:59.000Z

    Geothermal development in The Geysers KGRA has affected local public services and fiscal resources in Sonoma, Lake, Mendocino, and Napa counties. Each of these counties underwent rapid population growth between 1970 and 1980, some of which can be attributed to geothermal development. The number of workers currently involved in the various aspects of geothermal development in The Geysers is identified. Using three different development scenarios, projections are made for the number of power plants needed to reach the electrical generation capacity of the steam resource in The Geysers. The report also projects the cumulative number of workers needed to develop the steam field and to construct, operate, and maintain these power plants. Although the number of construction workers fluctuates, most are not likely to become new, permanent residents of the KGRA counties. The administrative and public service costs of geothermal development to local jurisdictions are examined and compared to geothermal revenues accruing to the local governments. Revenues do not cover the immediate fiscal needs resulting from increases in local road maintenance and school enrollment attributable to geothermal development. Several mitigation options are discussed, and a framework is presented for calculating mitigation costs per unit of public service.

  2. Development of the Robotic Touch foot Sensor for 2D walking Robot, for Studying Rough Terrain Locomotion

    E-Print Network [OSTI]

    Lee, Hunwoo

    2012-08-31T23:59:59.000Z

    Development of the Robotic Touch foot Sensor for 2D walking Robot, for Studying Rough Terrain Locomotion By HUNWOO LEE Submitted to the graduate degree program in Mechanical Engineering and the Graduate Faculty of the University of Kansas... ________________________________ Professor Robert Umholtz Date Defended: June 5, 2012 ii The Thesis Committee for HUNWOO LEE certifies that this is the approved version of the following thesis: Development of the Robotic Touch Foot Sensor for 2D Walking Robot...

  3. STUDY OF THE EFFECT OF PRIVATE WIRE LAWS ON DEVELOPMENT OF COMBINED...

    Broader source: Energy.gov (indexed) [DOE]

    and to consider the impact of those laws on the development of combined heat and power ("CHP") facilities, as well as to determine whether a change in those laws would impact...

  4. The process of resort second home development demand quantification : exploration of methodologies and case study application

    E-Print Network [OSTI]

    Wholey, Christopher J. (Christoper John)

    2011-01-01T23:59:59.000Z

    Prevalent methodologies utilized by resort second home development professionals to quantify demand for future projects are identified and critiqued. The strengths of each model are synthesized in order to formulate an ...

  5. Tenements : dwellings for the urban poor. Comparative study illustrating 28 cases in developing countries

    E-Print Network [OSTI]

    Aliman, Isam Mohammad

    1981-01-01T23:59:59.000Z

    Tenements are significant systems that provide habitation to the poor in most of the urban areas of the developing countries. Yet, tenements are practically ignored if not prohibited by the public sector and consequently ...

  6. Rugged field-service computing : a product development case study at Dell Inc.

    E-Print Network [OSTI]

    Giese, Jeremy M

    2014-01-01T23:59:59.000Z

    In the face of challenging market conditions, Dell, Inc. is in the process of shifting from focusing on electronics hardware development and sales to focusing on providing complete IT solutions to business clients. Part ...

  7. A Microgenetic Study Investigating the Influence of Justifications on Children's Development of a Theory of Mind.

    E-Print Network [OSTI]

    Fildes, Alison

    2007-01-01T23:59:59.000Z

    The influence, on theory of mind development, of asking children to verbally justify their own answers to traditional tests of false belief understanding was investigated using a microgentic procedure. 18 nursery school ...

  8. A portable audio/video recorder for longitudinal study of child development

    E-Print Network [OSTI]

    Vosoughi, Soroush

    Collection and analysis of ultra-dense, longitudinal observational data of child behavior in natural, ecologically valid, non-laboratory settings holds significant promise for advancing the understanding of child development ...

  9. The career development of successful Hispanic administrators in higher education: a Delphi study

    E-Print Network [OSTI]

    Silva, Rito , Jr.

    2009-06-02T23:59:59.000Z

    administrators in higher education by identifying recommendations and strategies proposed by a panel of successful Hispanic administrators to help Hispanics in the future. To focus on the career development of Hispanic administrators, a Delphi panel of 11...

  10. The Informal Sector and Economic Development in Latin America: A Brief Study of the Chilean Model

    E-Print Network [OSTI]

    Lee, Jordan

    2010-07-14T23:59:59.000Z

    A major hindrance to the achievement of steady economic growth is widespread informal employment, also known as the informal sector. The informal sector is a complex phenomenon which is pervasive in developing regions of the world such as sub...

  11. Creating transparency in the Chinese real estate development industry : a case study

    E-Print Network [OSTI]

    Han, Feng, S.M. Massachusetts Institute of Technology

    2005-01-01T23:59:59.000Z

    Transparency issue remains one of the top issues that have discouraged foreign investors to invest China's real estate market. This thesis establishes a framework for Chinese developers to create transparency for their ...

  12. Community Capacity Building, Community Development and Health: A Case Study of Health Issues in the Community

    E-Print Network [OSTI]

    Phillips, Richard

    This research project aimed to further knowledge regarding the relationship between community capacity building (CCB), community development and health within the context of the Health Issues in the Community (HIIC) ...

  13. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Amir Mehdi Dehkhoda

    E-Print Network [OSTI]

    for Biodiesel Production by Amir Mehdi Dehkhoda B.Sc., Sharif University of Technology, 2008 A THESIS SUBMITTED Developing Biochar-Based Catalyst for Biodiesel Production CHBE 599 August 01, 2010 126 1061 University

  14. Advanced LWR Nuclear Fuel Cladding System Development Trade-Off Study

    SciTech Connect (OSTI)

    Kristine Barrett; Shannon Bragg-Sitton

    2012-09-01T23:59:59.000Z

    The Advanced Light Water Reactor (LWR) Nuclear Fuel Development Research and Development (R&D) Pathway encompasses strategic research focused on improving reactor core economics and safety margins through the development of an advanced fuel cladding system. To achieve significant operating improvements while remaining within safety boundaries, significant steps beyond incremental improvements in the current generation of nuclear fuel are required. Fundamental improvements are required in the areas of nuclear fuel composition, cladding integrity, and the fuel/cladding interaction to allow power uprates and increased fuel burn-up allowance while potentially improving safety margin through the adoption of an accident tolerant fuel system that would offer improved coping time under accident scenarios. With a development time of about 20 25 years, advanced fuel designs must be started today and proven in current reactors if future reactor designs are to be able to use them with confidence.

  15. Modelling energy-economy interactions in small developing countries : a case study of Sri Lanka

    E-Print Network [OSTI]

    Blitzer, Charles R.

    1985-01-01T23:59:59.000Z

    This report is addressed at modelling energy-economy interactions in small developing countries, those with populations less than 20 million or so and where neither the industrial or energy sectors are dominant. The overall ...

  16. Understanding, modeling and improving the development of complex products : method and study

    E-Print Network [OSTI]

    Rogers, Bradley W. (Bradley Warren)

    2009-01-01T23:59:59.000Z

    Development of new aerostructure designs frequently occurs through a complex process that is difficult to understand and control. Tight requirements for weight, cost, strength, and aerodynamic behavior create many ...

  17. Sludge Treatment and Extraction Technology Development: Results of FY 1993 studies

    SciTech Connect (OSTI)

    Lumetta, G.J.; Wagner, M.J.; Barrington, R.J.; Rapko, B.M.; Carlson, C.D.

    1994-03-01T23:59:59.000Z

    This report describes experimental results from work conducted in FY 1993 under the Sludge Treatment and Extraction Technology Development Task of the Tank Waste Remediation System (TWRS) Pretreatment Technology Development Project at Pacific Northwest Laboratory (PNL). Experiments were conducted in the following six general areas: (1) sludge washing, (2) sludge leaching, (3) sludge dissolution, (4) actinide separation by solvent extraction and extraction chromatography, (5) Sr separation by solvent extraction, and (6) extraction of Cs from acidic solution.

  18. Urban growth pattern and sustainable development: a comparative study of municipalities in the Seoul Metropolitan Region

    E-Print Network [OSTI]

    Paek, Seunggeun

    2006-10-30T23:59:59.000Z

    , environmental protection, and social equity (Agyeman & Evans, 2003; Campbell, 1996; World Bank, 2003). The sustainability agenda is a major global issue and at the same time a local issue. Sustainability is seen to be meaningful and achievable only when... in achieving sustainable development goals, Agenda 21, a comprehensive global blueprint for sustainable development adopted by the 1992 Earth Summit, recommends that local authorities adopt a local Agenda 21. Local Agenda 21 is community-based processes...

  19. GRADUATE STUDIES IN THE HISTORY OF PHOTOGRAPHY The program of studies in the history of photography at Princeton University developed

    E-Print Network [OSTI]

    (painting, architecture, sculpture, prints and drawings, cinema) that allow them to explore various by the student's advisor. These courses might include German 525 (Studies in German Film); History of Science 593 (Science from the Enlightenment to the Present); History of Science 598 (History of Technology); Sociology

  20. THE INFLUENCE OF SOCIAL CAPITAL ON THE DEVELOPMENT OF NATURE TOURISM: A CASE STUDY FROM

    E-Print Network [OSTI]

    study from Bahia Magdalena, Mexico Project No. 451 Examining Committee: Chair: Jennifer Silver (Chair to assess the prospects for nature-based tourism. The case study is primarily based on a large-scale

  1. Urban growth pattern and sustainable development: a comparative study of municipalities in the Seoul Metropolitan Region

    E-Print Network [OSTI]

    Paek, Seunggeun

    2006-10-30T23:59:59.000Z

    The main purpose of this study was to obtain a better understanding of the impact of urban growth and change on sustainability based on a comparative study of municipalities comprising Gyeonggi Province within the Seoul Metropolitan Region, Korea...

  2. Essays using military-induced variation to study social interactions, human capital development, and labor markets

    E-Print Network [OSTI]

    Lyle, David S. (David Stephen), 1971-

    2003-01-01T23:59:59.000Z

    This dissertation consists of four empirical studies, each using military-induced variation to examine various aspects of human capital production and the U.S. labor market. The first two chapters study the effects of ...

  3. Numerical Approximations of Stochastic Optimal Stopping and Control Problems

    E-Print Network [OSTI]

    Siska, David

    2007-01-01T23:59:59.000Z

    We study numerical approximations for the payoff function of the stochastic optimal stopping and control problem. It is known that the payoff function of the optimal stopping and control problem corresponds to the solution ...

  4. Numerical and Experimental Investigation of Tidal Current Energy Extraction

    E-Print Network [OSTI]

    Sun, Xiaojing

    2008-01-01T23:59:59.000Z

    Numerical and experimental investigations of tidal current energy extraction have been conducted in this study. A laboratory-scale water flume was simulated using commercial computational fluid dynamics (CFD) code FLUENT. ...

  5. MHD Remote Numerical Simulations: Evolution of Coronal Mass Ejections

    E-Print Network [OSTI]

    L. Hernandez-Cervantes; A. Santillan; A. R. Gonzalez-Ponce

    2008-12-22T23:59:59.000Z

    Coronal mass ejections (CMEs) are solar eruptions into interplanetary space of as much as a few billion tons of plasma, with embedded magnetic fields from the Sun's corona. These perturbations play a very important role in solar--terrestrial relations, in particular in the spaceweather. In this work we present some preliminary results of the software development at the Universidad Nacional Autonoma de Mexico to perform Remote MHD Numerical Simulations. This is done to study the evolution of the CMEs in the interplanetary medium through a Web-based interface and the results are store into a database. The new astrophysical computational tool is called the Mexican Virtual Solar Observatory (MVSO) and is aimed to create theoretical models that may be helpful in the interpretation of observational solar data.

  6. RELAP-7 Numerical Stabilization: Entropy Viscosity Method

    SciTech Connect (OSTI)

    R. A. Berry; M. O. Delchini; J. Ragusa

    2014-06-01T23:59:59.000Z

    The RELAP-7 code is the next generation nuclear reactor system safety analysis code being developed at the Idaho National Laboratory (INL). The code is based on the INL's modern scientific software development framework, MOOSE (Multi-Physics Object Oriented Simulation Environment). The overall design goal of RELAP-7 is to take advantage of the previous thirty years of advancements in computer architecture, software design, numerical integration methods, and physical models. The end result will be a reactor systems analysis capability that retains and improves upon RELAP5's capability and extends the analysis capability for all reactor system simulation scenarios. RELAP-7 utilizes a single phase and a novel seven-equation two-phase flow models as described in the RELAP-7 Theory Manual (INL/EXT-14-31366). The basic equation systems are hyperbolic, which generally require some type of stabilization (or artificial viscosity) to capture nonlinear discontinuities and to suppress advection-caused oscillations. This report documents one of the available options for this stabilization in RELAP-7 -- a new and novel approach known as the entropy viscosity method. Because the code is an ongoing development effort in which the physical sub models, numerics, and coding are evolving, so too must the specific details of the entropy viscosity stabilization method. Here the fundamentals of the method in their current state are presented.

  7. Vegetation component of geothermal EIS studies: Introduced plants, ecosystem stability, and geothermal development

    SciTech Connect (OSTI)

    NONE

    1994-10-01T23:59:59.000Z

    This paper contributes new information about the impacts from introduced plant invasions on the native Hawaiian vegetation as consequences of land disturbance and geothermal development activities. In this regard, most geothermal development is expected to act as another recurring source of physical disturbance which favors the spread and maintenance of introduced organisms throughout the region. Where geothermal exploration and development activities extend beyond existing agricultural and residential development, they will become the initial or sole source of disturbance to the naturalized vegetation of the area. Kilauea has a unique ecosystem adapted to the dynamics of a volcanically active landscape. The characteristics of this ecosystem need to be realized in order to understand the major threats to the ecosystem and to evaluate the effects of and mitigation for geothermal development in Puna. The native Puna vegetation is well adapted to disturbances associated with volcanic eruption, but it is ill-adapted to compete with alien plant species in secondary disturbances produced by human activities. Introduced plant and animal species have become a major threat to the continued presence of the native biota in the Puna region of reference.

  8. Physical and Numerical Space Running Head: Biases in Physical and Numerical Space

    E-Print Network [OSTI]

    Chatterjee, Anjan

    Physical and Numerical Space 1 Running Head: Biases in Physical and Numerical Space Elementary school children's attentional biases in physical and numerical space Tilbe Göksun: April 30, 2012 #12; Physical and Numerical Space 2 Abstract Numbers

  9. Numerical modeling of vertical cavity semiconductor lasers

    SciTech Connect (OSTI)

    Chow, W.W.; Hadley, G.R.

    1996-08-01T23:59:59.000Z

    A vertical cavity surface emitting laser (VCSEL) is a diode laser whose optical cavity is formed by growing or depositing DBR mirror stacks that sandwich an active gain region. The resulting short cavity supports lasing into a single longitudinal mode normal to the wafer, making these devices ideal for a multitude of applications, ranging from high-speed communication to high-power sources (from 2D arrays). This report describes the development of a numerical VCSEL model, whose goal is to both further their understanding of these complex devices and provide a tool for accurate design and data analysis.

  10. Low-rank coal study: national needs for resource development. Volume 3. Technology evaluation

    SciTech Connect (OSTI)

    Not Available

    1980-11-01T23:59:59.000Z

    Technologies applicable to the development and use of low-rank coals are analyzed in order to identify specific needs for research, development, and demonstration (RD and D). Major sections of the report address the following technologies: extraction; transportation; preparation, handling and storage; conventional combustion and environmental control technology; gasification; liquefaction; and pyrolysis. Each of these sections contains an introduction and summary of the key issues with regard to subbituminous coal and lignite; description of all relevant technology, both existing and under development; a description of related environmental control technology; an evaluation of the effects of low-rank coal properties on the technology; and summaries of current commercial status of the technology and/or current RD and D projects relevant to low-rank coals.

  11. Low-rank coal study: national needs for resource development. Volume 6. Peat

    SciTech Connect (OSTI)

    Not Available

    1980-11-01T23:59:59.000Z

    The requirements and potential for development of US peat resources for energy use are reviewed. Factors analyzed include the occurrence and properties of major peat deposits; technologies for extraction, dewatering, preparation, combustion, and conversion of peat to solid, liquid, or gaseous fuels; environmental, regulatory, and market constraints; and research, development, and demonstration (RD and D) needs. Based on a review of existing research efforts, recommendations are made for a comprehensive national RD and D program to enhance the use of peat as an energy source.

  12. Recreation as a factor in home site development on Lake Livingston, Texas -- a comparative study

    E-Print Network [OSTI]

    DeLoney, James A

    1973-01-01T23:59:59.000Z

    in Polk County on Lake Livingston, Texas, and then compared the results of this study with similar research conducted by Wood on Lake Whitney, Texas (43) . Lake Livingston was built and controlled by the Trinity River Authority and the City of Houston.... INTRODUCTION Purpose and Scope of Study Literature Review The Study Area Geographic Location and Accessibility of Lake Livingston Natural Resources of Lake Livingston Topography in Polk County Soils in Polk County Climatic Conditions in Polk County...

  13. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Alex Biczok

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA: This report contains the results of a life-cycle assessment (LCA) performed on the Hennings Building Cycle Assessment (LCA) is to quantify the material and energy inputs into a product or product system

  14. Experimental study of heavy flavor physics and SSC research and development at The University of Mississippi

    SciTech Connect (OSTI)

    Reidy, J.J.

    1990-01-01T23:59:59.000Z

    This report discusses the following topics: particle production of charmed particle; progress in the SSC research and development program; CALOR/GEANT integration; the calorimeter simulation effort; scintillating plate/liquid argon calorimeter simulation; liquid scintillator R D; and funding by the TNRLC.

  15. Lessons for Chinese mega-mall development : a case study of the South China Mall

    E-Print Network [OSTI]

    Ai, Lu, S.M. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    China is embracing mega-mall development: Seven out of the ten largest shopping malls in the world will have been located in China by the year 2010. All the completed mega-malls are now suffering from high vacancy rates ...

  16. GIS solutions for ecosystem management in developing countries: A case study of Sao Tome and Principe

    SciTech Connect (OSTI)

    Barnes, L.; Barrasso, T. [Booz, Allen & Hamilton Inc., McLean, VA (United States); Pinto da Costa, H. [ECO Sao Tome e Principe (Sao Tome and Principe)

    1995-12-01T23:59:59.000Z

    The purpose of this paper is to promote awareness of the application of the Geographic information system (GIS) technology to the management of ecosystems in developing countries. The adoptation of systematic environmental research and management techniques by national and local conservation programs helps ensure the sustainability of important biological resources.

  17. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Andrew Russell

    E-Print Network [OSTI]

    which aims to support the development of the field of life cycle assessment (LCA). The information.sianchuk@gmail.com #12;1 Life Cycle Assessment Improvements of Frederic Lasserre Building at University of British Previous cradle to gate life cycle assessment work on the Frederic Lasserre building of UBC

  18. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Devon Brownlee

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA BUILDING Life Cycle Assessment CIVL 498C November 18, 2013 1065 1548 University of British Columbia at rob.sianchuk@gmail.com #12;UBC MUSIC BUILDING Life Cycle Assessment Brownlee, Devon Model Prepared

  19. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Kendrick Carnes

    E-Print Network [OSTI]

    which aims to support the development of the field of life cycle assessment (LCA). The information.sianchuk@gmail.com #12;LIFE CYCLE ASSESSMENT Level 3 Building Elements of the Douglas Kenny Building Kendrick Carnes CIVL 498C #12;Page 1 Executive Summary Life Cycle Assessment is the only tool in which decisions regarding

  20. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Kevin Preston

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA UBC Pharmacy Building Life Cycle Assessment and Critical Review for a New Building at UBC in Vancouver at rob.sianchuk@gmail.com #12;University of British Columbia LCA of New UBC Pharmacy Building Life Cycle

  1. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Malek Charif

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA.e. to conduct a limited Life Cycle Assessment (LCA), of assigned building. In this case, the object at rob.sianchuk@gmail.com #12;A Life Cycle Assessment of UBC ICICS Building A Report Submitted in Partial

  2. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Jericho Velarde

    E-Print Network [OSTI]

    the UBC LCA Project which aims to support the development of the field of life cycle assessment (LCA at rob.sianchuk@gmail.com #12;LIFE CYCLE ASSESSMENT H.R. MacMillan, University of British Columbia Cycle Analysis (LCA) of the H.R. MacMillan building is done in order to assess the environmental impact

  3. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Cayley Van Hemmen

    E-Print Network [OSTI]

    which aims to support the development of the field of life cycle assessment (LCA). The information.sianchuk@gmail.com #12;i Life Cycle Assessment of The Civil and Mechanical Engineering Building CIVL 498C: Life Cycle Cycle Assessment of The Civil and Mechanical Engineering Building CIVL 498C November 18, 2013 1065 1531

  4. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Cassie Tesche

    E-Print Network [OSTI]

    which aims to support the development of the field of life cycle assessment (LCA). The information Building, University of British Columbia Life Cycle Assessment Final Report CIVL 498C November 18, 2013.sianchuk@gmail.com #12;11/18/2013 Chemistry Building, University of British Columbia Life Cycle Assessment Final Report

  5. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainability DeBETAbility: Is the Beta House Ecologically Sustainable?

    E-Print Network [OSTI]

    BETAbility: Is the Beta House Ecologically Sustainable? Ada Cheung, Candy Cheung, Sapna Dilgir, Dallas Parsons, Jessica for the implementation of more ecologically sustainable practices at the Beta House, we recommend that the membersUBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainability De

  6. FINESSE: study of the issues, experiments and facilities for fusion nuclear technology research and development. Interim report. Volume I

    SciTech Connect (OSTI)

    Abdou, M.

    1984-10-01T23:59:59.000Z

    The following chapters are included in this study: (1) fusion nuclear issues, (2) survey of experimental needs, (3) requirements of the experiments, (4) non-fusion facilities, (5) fusion facilities for nuclear experiments, and (6) fusion research and development scenarios. (MOW)

  7. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Power to the People: New Student Union Building Energy Harvesting

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Power to the People: New to power a variety of low input power devices, such as lights or speakers without any additional help from compete against one another to see who could generate the most power. To promote student

  8. A case study of industrial building energy performance in a cold climate region in a developing country

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 A case study of industrial building energy performance in a cold climate region in a developing to analyze industrial building energy performance. A lack of communication, cultural differences in design of methods to evaluate building energy use, air leakage, condensation, thermal insulation, and indoor air

  9. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Agricultural Sciences 450 The Sustainability of the UBC Food System Collaborative

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Agricultural Sciences 450, Sandy Lee, Erin McMillan, Andrew Smith, Lysa Wone University of British Columbia AGSC 450 March 31, 2004 of a project/report". #12;Agricultural Sciences 450 The Sustainability of the UBC Food System Collaborative

  10. UBC Social Ecological Economic Development Studies (SEEDS) Student Report An Investigation Into Using Electricity Harvesting Elliptical Machines

    E-Print Network [OSTI]

    of greenhouse gas emissions. This report recommends installing 15 ReRev machines in the space already allocatedUBC Social Ecological Economic Development Studies (SEEDS) Student Report An Investigation Into Using Electricity Harvesting Elliptical Machines As A Renewable Energy Source Remy Barois, Michael

  11. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Composting in the SUB vs. Composting via UBC Waste Management

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Composting in the SUB vs. Composting via UBC Waste Management Ian Loo, Kelvin Siu, Kevin Brooks University of British Columbia APSC261 the current status of the subject matter of a project/report". #12;APSC 261 Sustainability Project Composting

  12. Compost: A study of the development process and end-product potential for suppression of turfgrass disease

    E-Print Network [OSTI]

    Boland, Greg J.

    Review Compost: A study of the development process and end-product potential for suppression, biological control, compost, disease, fungi, microbiology, pathogen, suppression, turf, turfgrass Summary The relationships among the chemical, physical and biological aspects of compost and their role in suppression

  13. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Composting at UBC: An Agriculture Practice that Benefits the Whole Community

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Composting at UBC of a project/report". #12;Composting at UBC: An Agriculture Practice that Benefits the Whole Community Group 6 by our group was that even though UBC had an existing composting system, 70% of its waste stream is still

  14. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainability Research Proposal for the UBC Food System

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Sustainability Research of a project/report". #12;Sustainability Research Proposal for the UBC Food System AGSC 450 Group Members, UBC's Food Sustainability Project 1 of 25 TABLE OF CONTENTS Page 1. Abstract

  15. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle Assessment of the Aquatic Ecosystems Research Laboratory

    E-Print Network [OSTI]

    of life cycle assessment (LCA). The information and findings contained in this report have not been, 2013 Final Report #12;CIVL 498C: Life Cycle Assessment of the Aquatic Ecosystems Research LaboratoryUBC Social Ecological Economic Development Studies (SEEDS) Student Report Daniel Tse Life Cycle

  16. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Alex Imbault, C. Jacob Fountain, Dawn-Marie Barreira, Wendy Tsai

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Alex Imbault, C. Jacob with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect

  17. Cutting energy costs in multifamily housing: Practical case studies for the builder and developer

    SciTech Connect (OSTI)

    Whiddon, W.I.

    1986-01-01T23:59:59.000Z

    This book is based on an expert evaluation of nine existing and three proposed multifamily housing projects across the US. The existing buildings include three lowrise projects (three to four stories), six midrises (five to seven stories), and three highrise buildings (nine to thirty-nine stories). Two projects were designed and built in the late 1950's, two in the late 1960's, and five late in the ''energy-crisis'' of the 1970's. The existing projects range from municipally subsidized elderly housing, to HUD Section-8 suburban developments, to luxury urban highrise buildings. The three ''future'' buildings, designed by the NAHB research team, were based on trends anticipated in the multifamily industry by IREM and NAHB leaders, over the next five years. The key trends identified were: downsizing of units (by 10 to 20%); increased project size (in number of units), denser developments (more midrise and highrise projects), and increased amenities - all in the context of more affordable housing.

  18. Numerical methods in heat transfer

    SciTech Connect (OSTI)

    Emery, A.F.; Douglass, R.W.

    1988-01-01T23:59:59.000Z

    This book contains nine papers. Some of the titles are: Numerical calculation of bubble growth in nucleate boiling from inception through departure; An evaluation of a translator for finite element data to resistor/capacitor data for the heat diffusion; Thermophoretic deposition due to jet impingement on an inclined plane; and A three-dimensional boundary-fitted coordinate system.

  19. Mathematical and Numerical Analyses of Peridynamics for Multiscale Materials Modeling

    SciTech Connect (OSTI)

    Du, Qiang

    2014-11-12T23:59:59.000Z

    The rational design of materials, the development of accurate and efficient material simulation algorithms, and the determination of the response of materials to environments and loads occurring in practice all require an understanding of mechanics at disparate spatial and temporal scales. The project addresses mathematical and numerical analyses for material problems for which relevant scales range from those usually treated by molecular dynamics all the way up to those most often treated by classical elasticity. The prevalent approach towards developing a multiscale material model couples two or more well known models, e.g., molecular dynamics and classical elasticity, each of which is useful at a different scale, creating a multiscale multi-model. However, the challenges behind such a coupling are formidable and largely arise because the atomistic and continuum models employ nonlocal and local models of force, respectively. The project focuses on a multiscale analysis of the peridynamics materials model. Peridynamics can be used as a transition between molecular dynamics and classical elasticity so that the difficulties encountered when directly coupling those two models are mitigated. In addition, in some situations, peridynamics can be used all by itself as a material model that accurately and efficiently captures the behavior of materials over a wide range of spatial and temporal scales. Peridynamics is well suited to these purposes because it employs a nonlocal model of force, analogous to that of molecular dynamics; furthermore, at sufficiently large length scales and assuming smooth deformation, peridynamics can be approximated by classical elasticity. The project will extend the emerging mathematical and numerical analysis of peridynamics. One goal is to develop a peridynamics-enabled multiscale multi-model that potentially provides a new and more extensive mathematical basis for coupling classical elasticity and molecular dynamics, thus enabling next generation atomistic-to-continuum multiscale simulations. In addition, a rigorous study of nite element discretizations of peridynamics will be considered. Using the fact that peridynamics is spatially derivative free, we will also characterize the space of admissible peridynamic solutions and carry out systematic analyses of the models, in particular rigorously showing how peridynamics encompasses fracture and other failure phenomena. Additional aspects of the project include the mathematical and numerical analysis of peridynamics applied to stochastic peridynamics models. In summary, the project will make feasible mathematically consistent multiscale models for the analysis and design of advanced materials.

  20. Case study of verification, validation, and testing in the Automated Data Processing (ADP) system development life cycle

    SciTech Connect (OSTI)

    Riemer, C.A.

    1990-05-01T23:59:59.000Z

    Staff of the Environmental Assessment and Information Sciences Division of Argonne National Laboratory (ANL) studies the role played by the organizational participants in the Department of Veterans Affairs (VA) that conduct verification, validation, and testing (VV T) activities at various stages in the automated data processing (ADP) system development life cycle (SDLC). A case-study methodology was used to assess the effectiveness of VV T activities (tasks) and products (inputs and outputs). The case selected for the study was a project designed to interface the compensation and pension (C P) benefits systems with the centralized accounts receivable system (CARS). Argonne developed an organizational SDLC VV T model and checklists to help collect information from C P/CARS participants on VV T procedures and activities, and these were then evaluated against VV T standards.

  1. PROCESS DEVELOPMENT STUDIES ON THE BIOCONVERSION OF CELLULOSE AND PRODUCTION OF ETHANOL

    E-Print Network [OSTI]

    Wilke, C.R.

    2011-01-01T23:59:59.000Z

    OF CELLULOSE AND PRODUCTION OF ETHANOL under auspices of22 Mohammad Riaz ETHANOL FERMENTATION STUDIES II I. A. B.Hydrolyzates to Ethanol J2 Ren-Der Yang

  2. Development and Verification of a Truck Driving Simulator for Driver Drowsiness Studies

    E-Print Network [OSTI]

    Vertes, Akos

    environment. The control of simulation conditions in a driving simulator allows independent study of driving) and the Modeling, Simulation and Driving Simulators (MSIS) research unit of the French National Institute Steering torque feedback

  3. Market research as an aid to economic development: a case study

    E-Print Network [OSTI]

    Sechrist, Daniel Robert

    1990-01-01T23:59:59.000Z

    trade. Empirical Literature Another study that is germane to this research identified characteristics that are common to agribusiness trade centers [Outlaw]. This study surveyed counties in Texas, Kansas, Alabama, Georgia, and Mississippi. Through... of retail sales. Almost all of the rural counties in the High Plains of Texas are losing substantial retail sales to nearby metropolitan areas. Since retaining retail business is one strategy for revitalizing rural areas, local business people nccd...

  4. Integrated Numerical Experiments (INEX) and the Free-Electron Laser Physical Process Code (FELPPC)

    SciTech Connect (OSTI)

    Thode, L.E.; Chan, K.C.D.; Schmitt, M.J.; McKee, J.; Ostic, J.; Elliott, C.J.; McVey, B.D.

    1990-01-01T23:59:59.000Z

    The strong coupling of subsystem elements, such as the accelerator, wiggler, and optics, greatly complicates the understanding and design of a free electron laser (FEL), even at the conceptual level. Given the requirements for high-performance FELs, the strong coupling between the laser subsystems must be included to obtain a realistic picture of the potential operational capability. To address the strong coupling character of the FEL the concept of an Integrated Numerical Experiment (INEX) was proposed. Unique features of the INEX approach are consistency and numerical equivalence of experimental diagnostics. The equivalent numerical diagnostics mitigates the major problem of misinterpretation that often occurs when theoretical and experimental data are compared. The INEX approach has been applied to a large number of accelerator and FEL experiments. Overall, the agreement between INEX and the experiments is very good. Despite the success of INEX, the approach is difficult to apply to trade-off and initial design studies because of the significant manpower and computational requirements. On the other hand, INEX provides a base from which realistic accelerator, wiggler, and optics models can be developed. The Free Electron Laser Physical Process Code (FELPPC) includes models developed from INEX, provides coupling between the subsystems models and incorporates application models relevant to a specific trade-off or design study.

  5. Characterize and explore potential sites and prepare research and development plan (site investigation study). Final draft. Task 2. Milestone report

    SciTech Connect (OSTI)

    None

    1980-12-01T23:59:59.000Z

    A specific research and development plan to investigate the behavior and suitability of aquifers as compressed air energy storage (CAES) sites is presented. The proposed effort will evaluate present uncertainties in the performance of the underground energy storage subsystem and its impact on above ground plant design and cost. The project is planned to provide the utility industry with a quantitative basis for confidence that financial commitment to a demonstration plant and subsequent expansion is justified and poses acceptable risks. Activities in Phase II of a 5-phase overall CAES development program are reported. Information is included on the development of field testing specifications and schedules; selection of specific site for the conceptual design; development plan and schedule for the media site; development of analytical models of aquifer airflow; and well drilling requirements. As a result of these studies 14 sites in Illinois and Indiana were evaluated, 7 were ranked for suitability for CAES, and 4 were selected for possible use in the field testing program. Test procedures, the mathematical models and drilling requirments were developed. (LCL)

  6. Numerical bifurcation analysis of piecewise smooth systems

    E-Print Network [OSTI]

    ( ) ( ) ( ) ( ), , outoutinin inin xffxff xhhxgg xxxx == == #12;Numerical bifurcation analysis of piecewise smooth systems INRIA

  7. Experimental study of heavy flavor physics and SSC research and development at the University of Mississippi

    SciTech Connect (OSTI)

    Reidy, J.J.; Cremaldi, L.M.; Summers, D.J.

    1992-01-01T23:59:59.000Z

    The High Energy Physics Group has been principally involved with Fermilab experiments on photoproduction and hadroproduction of charm. Nuclear reactions with a mixed 250-GeV hadronic beam and 500-GeV [pi]-N interactions were used. Considerable attention is devoted to the UNIX/RISC computing farm. The Group also has an SSC R D program dealing with the adaptation and use of the HETC-based detector simulation code CALOR89, the development of liquid scintillator technology for use in SSC detector calorimeters, the hanging file calorimeter project, and the calorimetry program for GEM.

  8. Development of a Fast Microfluidic Mixer for Studies of Protein Folding

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign: Potential Application toDevelopingandDevelopmentKineticsFinal

  9. Development of empirical potential functions for the study of molecular geometry, and applications to chlorophyll a dimers. [Dissertation

    SciTech Connect (OSTI)

    Oie, Tetsuro

    1980-01-01T23:59:59.000Z

    A purpose of the present studies is twofold: (1) development of an empirical potential function (EPF) and (2) application of it to the studies of photoreaction center chlorophyll a dimer. The reliable estimate of geometric structures and energies of large molecules by quantum mechanical methods is not possible at the present time. An alternative method is, therefore, needed for the studies of large molecular systems, and Chapter I is dedicated to the development of this tool, i.e., an empirical potential function, which could suffice this purpose. Because of a large number of variable chemical compositions and functional groups characteristically present in a large molecule, it is important to include a large number of structurally diverse molecules in the development of the EPF. In Chapter II, the EPF is applied to study the geometrical structure of a chlorophyll a (Chl a) dimer, which is believed to exist at the photoreaction center of green plants and is known to play an essential role in photosynthetic energy conversion. Although various models have been proposed for this dimer structure, there is still a great need for information concerning the detailed geometric structure of this dimer. Therefore, in this chapter the structural stabilities of various dimer models are examined by the EPF, and detailed and quantitative information on the structure and stability of these models is provided.

  10. Numerical simulation of transient, incongruent vaporization induced by high power laser

    SciTech Connect (OSTI)

    Tsai, C.H.

    1981-01-01T23:59:59.000Z

    A mathematical model and numerical calculations were developed to solve the heat and mass transfer problems specifically for uranum oxide subject to laser irradiation. It can easily be modified for other heat sources or/and other materials. In the uranium-oxygen system, oxygen is the preferentially vaporizing component, and as a result of the finite mobility of oxygen in the solid, an oxygen deficiency is set up near the surface. Because of the bivariant behavior of uranium oxide, the heat transfer problem and the oxygen diffusion problem are coupled and a numerical method of simultaneously solving the two boundary value problems is studied. The temperature dependence of the thermal properties and oxygen diffusivity, as well as the highly ablative effect on the surface, leads to considerable non-linearities in both the governing differential equations and the boundary conditions. Based on the earlier work done in this laboratory by Olstad and Olander on Iron and on Zirconium hydride, the generality of the problem is expanded and the efficiency of the numerical scheme is improved. The finite difference method, along with some advanced numerical techniques, is found to be an efficient way to solve this problem.

  11. Development of a research methodology to study lumber waste due to design causes in residential construction

    E-Print Network [OSTI]

    Vyas, Ashok Madhusudan

    1999-01-01T23:59:59.000Z

    of the house frame. To be able to reduce waste caused by design, it is necessary to identify parameters of design, which cause the waste and control for them. This study is exploratory in nature. It proposes a research methodology that can be used to measure...

  12. Development of an ion drift chamber for Laser Induced Fluorescence studies

    E-Print Network [OSTI]

    Cain, Benjamin J

    1998-01-01T23:59:59.000Z

    gases, and accommodate various LIF studies as welL 26 1. J. T. White, E. S. Fry, Th. Walther, "Spectroscopic Particle Detection for Tracking and CDM Detection" (1996, proposal) 2. K. K. Darrow, Electrica! Phenomena in Gases (The Williams and Wilkins...

  13. Preprint 0 (2001) ?--? 1 Development of a new experimental method for studies

    E-Print Network [OSTI]

    Kammel, Peter

    to investigate the MWPCs with #­ and #­ sources. The chambers were tested in a vessel filled with clean hydrogen. Schmidt c , G.G. Semenchuk a , M. Soroka a , A.A. Vorobyov a , N.I. Voropaev a a Petersburg Nuclear These studies were conducted by our collaboration since 1997 [2]. A special test setup was constructed at PNPI

  14. Centre for Business History to study development of industrial gases industry

    E-Print Network [OSTI]

    Guo, Zaoyang

    be overestimated and the study - funded by German-based gas and engineering company, the Linde Group - aims to give. Wolfgang Reitzle, Chief Executive Officer of Linde AG said: "Over time, industrial gases have changed fellow, also funded by Linde AG, and co-ordinating the project board monitoring progress on the project

  15. UBC Social Ecological Economic Development Studies (SEEDS) Student Report ZEYU ROCKY ZHANG

    E-Print Network [OSTI]

    of the field of life cycle assessment (LCA). The information and findings contained in this report have are given for the use of LCA. #12;Life Cycle Assessment of UBC HEBB Building 1.0 General Information on the Assessment Purpose of the assessment The life cycle analysis of the UBC HEBB building is a study intended

  16. Numerical Simulations of Gamma-Ray Burst Explosions

    E-Print Network [OSTI]

    Lazzati, Davide; Lpez-Cmara, Diego

    2015-01-01T23:59:59.000Z

    Gamma-ray bursts are a complex, non-linear system that evolves very rapidly through stages of vastly different conditions. They evolve from scales of few hundred kilometers where they are very dense and hot to cold and tenuous on scales of parsecs. As such, our understanding of such a phenomenon can truly increase by combining theoretical and numerical studies adopting different numerical techniques to face different problems and deal with diverse conditions. In this review, we will describe the tremendous advancement in our comprehension of the bursts phenomenology through numerical modeling. Though we will discuss studies mainly based on jet dynamics across the progenitor star and the interstellar medium, we will also touch upon other problems such as the jet launching, its acceleration, and the radiation mechanisms. Finally, we will describe how combining numerical results with observations from Swift and other instruments resulted in true understanding of the bursts phenomenon and the challenges still lyi...

  17. Preliminary study of the potential environmental concerns associated with surface waters and geothermal development of the Valles Caldera

    SciTech Connect (OSTI)

    Langhorst, G.J.

    1980-06-01T23:59:59.000Z

    A preliminary evaluation is presented of possible and probable problems that may be associated with hydrothermal development of the Valles Caldera Known Geothermal Resource Area (KGRA), with specific reference to surface waters. Because of the history of geothermal development and its associated environmental impacts, this preliminary evaluation indicates the Valles Caldera KGRA will be subject to these concerns. Although the exact nature and size of any problem that may occur is not predictable, the baseline data accumulated so far have delineated existing conditions in the streams of the Valles Caldera KGRA. Continued monitoring will be necessary with the development of geothermal resources. Further studies are also needed to establish guidelines for geothermal effluents and emissions.

  18. Bringing Automated Model Checking to PLC Program Development - A CERN Case Study

    E-Print Network [OSTI]

    Fernandez Adiego, B; Tournier, J-C; Blanco Vinuela, E; Gonzalez Suarez, V M

    2014-01-01T23:59:59.000Z

    Verification of critical software is a high priority but a challenging task for industrial control systems. Model checking appears to be an appropriate approach for this purpose. However, this technique is not widely used in industry yet, due to some obstacles. The main obstacles encountered when trying to apply formal verification techniques at industrial installations are the difficulty of creating models out of PLC programs and defining formally the specification requirements. In addition, models produced out of real-life programs have a huge state space, thus preventing the verification due to performance issues. Our work at CERN (European Organization for Nuclear Research) focuses on developing efficient automatic verification methods for industrial critical installations based on PLC (Programmable Logic Controller) control systems. In this paper, we present a tool generating automatically formal models out of PLC code. The tool implements a general methodology which can support several input languages, ...

  19. Grid Development and a Study of B-flavour tagging at D�

    SciTech Connect (OSTI)

    Lewis, Philip William; /Imperial Coll., London

    2006-09-01T23:59:59.000Z

    Run IIa of the D0 experiment at the Tevatron took place between Spring 2002 and Spring 2006, collecting approximately 1.2 fb{sup -1} of data. A fundamental principal of the D0 computing model is the utilization of globally distributed computing resources as part of a grid. In particular use is made of the 'SAMGrid'. The first part of this thesis describes the work undertaken at Imperial College on several D0 distributed computing projects. These included the deployment and development of parts of the SAMGrid software suite, and participation in the Winter 2003/2004 data reprocessing effort. One of the major goals of the D0 experiment is the observation of mixing in the B{sub s}{sup 0}-meson system. The measurement of the mixing frequency is important as it can be used to constrain the CKM matrix, which describes CP violation in the Standard Model. The second part of this thesis describes the development of an opposite side flavour tagging algorithm and its calibration using B{sup +} and B{sub d}{sup 0} meson decays. The application of this algorithm to an analysis of the B{sub s}{sup 0} meson system is then described, which lead to the world's first two-sided limit on the B{sub s}{sup 0} meson oscillation frequency ({Delta}m{sub s}) which was measured to lie in the interval between 17 ps{sup -1} and 21 ps{sup -1} at the 90% confidence level.

  20. Puget Sound Dissolved Oxygen Modeling Study: Development of an Intermediate Scale Water Quality Model

    SciTech Connect (OSTI)

    Khangaonkar, Tarang; Sackmann, Brandon S.; Long, Wen; Mohamedali, Teizeen; Roberts, Mindy

    2012-10-01T23:59:59.000Z

    The Salish Sea, including Puget Sound, is a large estuarine system bounded by over seven thousand miles of complex shorelines, consists of several subbasins and many large inlets with distinct properties of their own. Pacific Ocean water enters Puget Sound through the Strait of Juan de Fuca at depth over the Admiralty Inlet sill. Ocean water mixed with freshwater discharges from runoff, rivers, and wastewater outfalls exits Puget Sound through the brackish surface outflow layer. Nutrient pollution is considered one of the largest threats to Puget Sound. There is considerable interest in understanding the effect of nutrient loads on the water quality and ecological health of Puget Sound in particular and the Salish Sea as a whole. The Washington State Department of Ecology (Ecology) contracted with Pacific Northwest National Laboratory (PNNL) to develop a coupled hydrodynamic and water quality model. The water quality model simulates algae growth, dissolved oxygen, (DO) and nutrient dynamics in Puget Sound to inform potential Puget Sound-wide nutrient management strategies. Specifically, the project is expected to help determine 1) if current and potential future nitrogen loadings from point and non-point sources are significantly impairing water quality at a large scale and 2) what level of nutrient reductions are necessary to reduce or control human impacts to DO levels in the sensitive areas. The project did not include any additional data collection but instead relied on currently available information. This report describes model development effort conducted during the period 2009 to 2012 under a U.S. Environmental Protection Agency (EPA) cooperative agreement with PNNL, Ecology, and the University of Washington awarded under the National Estuary Program