National Library of Energy BETA

Sample records for vevent uid t145429cdt

  1. Mixed hybrid nite element for a three dimensional uid structure interaction problem

    E-Print Network [OSTI]

    Murea, Cornel

    of the airship), energy industry (transport of the uid using elastic tanks). We are interested in computing

  2. On the eective thermal conductivity of a three-dimensionally structured uid-saturated metal foam

    E-Print Network [OSTI]

    Daraio, Chiara

    thermal conductivity to a large extent, a fact that must be dealt with in the foam manufacturing process thermal conductivity in the volume averaged homogeneous energy equation. Antohe et al. [11] also requiredOn the eective thermal conductivity of a three- dimensionally structured ¯uid-saturated metal foam

  3. Numerical simulation of seismicity due to uid injection in a brittle poroelastic medium

    E-Print Network [OSTI]

    is based on the combination of a model of seismicity in dry rocks and a model of pore £uid pressure di^Coulomb rupture criterion and to the volumetric elastic deformations, which in turn perturb the pore pressure radiation, which feeds back into pore pressure perturbations. They also show that, as expected, the amount

  4. An automated system for measuring gas production from forages inoculated with rumen uid and its use

    E-Print Network [OSTI]

    Griffith, Gareth

    An automated system for measuring gas production from forages inoculated with rumen ¯uid and its that has been developed to measure the production of fermentation gas from ruminant livestock feeds and the kinetics of fermentation (Theodorou et al., 1994, 1998). Gas production is measured from the in vitro

  5. Name: UID: Date: Bioengineering 2014-15 and 2015-16 requirements

    E-Print Network [OSTI]

    Alwan, Abeer

    Name: UID: Date: Bioengineering 2014-15 and 2015-16 requirements Updated 06/02/15 American Hist Life Science 3 Life Science 23L CS 31 or C&EE M20/MAE M20 Bioengineering 10 Bioengineering 100 Bioengineering 110 FOURTH YEAR Bioengineering 120 FALL WINTER SPRING SUMMER Bioengineering 165EW (ethics

  6. Name: UID: Date: Bioengineering 2009-10, 2010-11, 2011-12, 2012-13, 2013-14 REQUIREMENTS

    E-Print Network [OSTI]

    Alwan, Abeer

    Name: UID: Date: Bioengineering 2009-10, 2010-11, 2011-12, 2012-13, 2013-14 REQUIREMENTS Revised 6 or MAE/CEE M20 FOURTH YEAR Bioengineering 10 FALL WINTER SPRING SUMMER Bioengineering 100 Bioengineering C106** Bioengineering 110 Bioengineering 120 Bioengineering 165EW (ethics) Bioengineering 167L

  7. LEAVE WITHOUT PAY REQUEST * Name (Last, First, Middle) UID

    E-Print Network [OSTI]

    Zeng, Ning

    FOR THE PERIOD (Month/Day/Year) / / to / / THIS REQUEST IS (Check One): New Partial LWOP to % Extension Change upon termination of the Leave Without Pay. I have been notified of the Consolidated Omnibus Budget

  8. Page 1IDM UID: QZZERG 2015, ITER Organization TRANSP Users' Group Meeting, 23rd March 2015

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    Princeton Plasma Physics Laboratory

    ­ Supports Plasma Operations and Plasma Research ­ Extensive set of "Use Cases" requiring broad spectrum and Plasma Research ­ Contributed and validated by ITER Members · Workflow Engine ­ To orchestrate execution

  9. FP12 -16:40 Pmceedlng801 UID31.t Codmnw

    E-Print Network [OSTI]

    Antsaklis, Panos

    MODELING AND ANALYSIS OF HYBRID CONTROL SYSTEMS James. A. Stiver Dept. of Elecmcal Engineering Universityof in the control field to refer to systems with both analog and digital components. A common example of a hybrid to analyze and aid in the design of hybrid control systems. These methods relate to the design

  10. A comparison of grid-based techniques for Navier-Stokes fluid simulation in computer graphics

    E-Print Network [OSTI]

    Chrisman, Cameron


    uid simulator in which full ?uid cells are colored blue, ?solver is which grid cells are full, and which are empty,uid simulator in which full ?uid cells are colored blue, ?

  11. Metrochek/Smart Benefits Enrollment Form Name:____________________________________________ U.I.D. No. (not S.S.N.) __________________________

    E-Print Network [OSTI]

    Lathrop, Daniel P.

    Metrochek/Smart Benefits Enrollment Form Name:____________________________________________ U To enroll, send or bring this form, along with a Metrochek/Smart Benefits Payroll Deduction Authorization in the form of Smart Benefit Vouchers. These vouchers can be used to purchase fare from these providers

  12. Discharge of hydrothermal uids through sediment at the Escanaba Trough, Gorda Ridge (ODP Leg 169): assessing the

    E-Print Network [OSTI]

    Utrecht, Universiteit

    at different holes can be compared. At Hole 1037 B, a sedimentary reference site drilled away from the area and some monoclinic pyrrhotite are detected. The detrital magnetic signal is still apparent at intermediate

  13. Buoyancy eects on heat transfer and temperature proles in horizontal pipe ow of drag-reducing uids

    E-Print Network [OSTI]

    Aguilar, Guillermo

    Buoyancy eects on heat transfer and temperature pro®les in horizontal pipe ¯ow of drag 2000 Elsevier Science Ltd. All rights reserved. 1. Introduction In heated ¯ows in horizontal pipes February 2000 Abstract We have studied the extent to which buoyancy eects in horizontal pipe ¯ows of drag

  14. MATHEMATICAL METHODS IN THE APPLIED SCIENCES Math. Meth. Appl. Sci. 2002; 25:115139 (DOI: 10.1002/mma.276)

    E-Print Network [OSTI]

    pore pressure, if the compression is fast relative to the uid ow rate. Conversely, an increase in pore the pore- uid pressure and solid stress ÿelds were described by Biot [3]. The basic constitutive equations and to the pressure arising from the pore uid. Time- dependent uid ow is incorporated by combining the uid mass

  15. A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

    E-Print Network [OSTI]

    Spycher, Nicolas; Pruess, Karsten


    of water as the heat transmission ?uid in EGS has beena sys- tem with CO 2 as heat transmission ?uid requires an

  16. Reservoir monitoring and characterization using satellite geodetic data: Interferometric Synthetic Aperture Radar observations from the Krechba field, Algeria

    E-Print Network [OSTI]

    Vasco, D.W.


    uid saturation prediction in a multicomponent reservoir,Reservoir monitoring and characterization using geodetic data Landro, M. , 2001, Discrimination between pressure and ?uid saturation

  17. Spatially Modulated Structures in Convective Systems

    E-Print Network [OSTI]

    Kao, Hsien-Ching


    Mode in Pattern Formation Convection in a horizontal ?uid layer rotating about the vertical or subject

  18. Numerical simulations of stratified fluid flow over topography near resonance

    E-Print Network [OSTI]

    Brown, Harmony Rose


    tidal ?ow over isolated topography. Deep Sea Research II,strati?ed ?uid ?ow over topography. J. Fluid Mech. , [22] I.strati?ed ?uid ?ow over topography near resonance A thesis

  19. Cohomological Invariants of Algebraic Tori

    E-Print Network [OSTI]

    Blinstein, Semyon


    High Porosity Silica Aerogels. ” J. Non-Crystalline SolidsW.P. Halperin. “Anisotropic Aerogels for Studying Super?uidCompressed Silica Aerogels for the Study of Super?uid 3

  20. Experimental and Analytical Studies on Pyroelectric Waste Heat Energy Conversion

    E-Print Network [OSTI]

    Lee, Felix


    ect of working ?uids on organic Rankine cycle for waste heatof such devices. Organic Rankine cycles and Stirling engines

  1. Homogeneous percolation versus arrested phase separation in attractively-driven nanoemulsion

    E-Print Network [OSTI]

    Doyle, Patrick S.

    ,2 paints, drilling uids, templates for porous materials3 and advanced inks designed for 3D printing

  2. Estimating permeability from quasi-static deformation: Temporal variations and arrival time inversion

    E-Print Network [OSTI]

    Vasco, D.W.


    uid saturation prediction in a multicomponent reservoir,saturation change. Furthermore, at the pressures within the Krechba reservoir

  3. Eddy fluxes in baroclinic turbulence

    E-Print Network [OSTI]

    Thompson, Andrew F.


    Gill 1982), which transport warm (cold) ?uid poleward (heat transport. Panel (a) shows how warm and cold patches

  4. hi i-pt.CP SiLICA DgpoSl.Tl; IN lB?,'; t Cl;: INSlIR 1 FOIl I. It. ito t L end 2 5. Buds-uid 5 -011

    E-Print Network [OSTI]

    Gudmundsson, Jon Steinar

    = friction inc tot, dirsens ionloss c = radius, is 2 -- B fouling rc.;istanco, (hW/n; 14) 1 2 U os''r,ill heat transfer coefficient hW/si K = xl ;`p] e 505OiO , n (unless otherwise stated) = toughiess iunoti the Bern te; ire,, -co nC pne;sure of tir i'se:veSr, i;uri;,;- uti]frrl'''.; the w;,:ci'a nrc ant b-rn;.e t

  5. Modeling broadband poroelastic propagation using an asymptotic approach

    E-Print Network [OSTI]

    Vasco, Donald W.


    for coupling porous f ow and geomechanics, SPE Journal, 11,modeling of f uid f ow and geomechanics is vast but lacking

  6. Elementary Vortex Processes in Thermal Superfluid Turbulence

    E-Print Network [OSTI]

    Kivotides, Demosthenes; Wilkin, S. Louise


    a complex system of vortex tubes has only (a vigorouslyIn this context, the vortex tube model (VTM) of Kivotidesstraight normal ?uid vortex tube, suggested an explicit

  7. Estimating permeability from quasi-static deformation: Temporal variations and arrival time inversion

    E-Print Network [OSTI]

    Vasco, D.W.


    production and oil-related subsidence: in Tison, L. J. , (Ed. ), Land subsidence, 1 , Internat. Assoc. Sci. Hydrologyand Yen, T. F. , 1994, Subsidence due to ?uid withdrawal:

  8. A ?nite element method to model attenuation and dispersion effects ...

    E-Print Network [OSTI]


    particular case the seismic method is ef?cient. 2 . Proposed methodology we consider a 2D isotropic ?uid—saturated porous material (I with boundary 3Q ...

  9. Imaging and modeling of flow in porous media using clinical nuclear emission tomography systems and computational fluid dynamics

    E-Print Network [OSTI]

    Boutchko, R.


    emission tomography systems and computational fluid dynamicsa computational ?uid dynamics (CFD) model of the systemthe computational domain. A Cartesian coordinate system was

  10. ng to fat-fr w.choosemyplat

    E-Print Network [OSTI]

    than re s popular in waffles, and buttermilk wo to three o the USDA. erm uid and pow en removed nt than

  11. A Numerical Algorithm for Single Phase Fluid Flow in Elastic Porous Media

    E-Print Network [OSTI]

    Ewing, Richard E.

    algorithm. KEYWORDS: geomechanics, uid ow, elastic deformation, porous media 1 Introduction Mechanical, petroleum, and environmental engineering for several decades. While considering the impact of the rock

  12. On the relationship between stress and elastic strain for porous and fractured rock

    E-Print Network [OSTI]

    Liu, Hui-Hai


    tectonic stress and pore pressure changes. Geophysics 2005;KB. Effects of stress, pore pressure, and pore ?uids on bulkchanges from pore- pressure variation. Geophysics 2006;71:

  13. Recyclable synthesis, characterization, and antimicrobial activity of chitosan-based polysaccharide composite materials

    E-Print Network [OSTI]

    Reid, Scott A.

    ). In this method, [BMImþ ClÀ ], an ionic liq- uid (IL), was used as a green solvent to dissolve and synthe- size

  14. ElaStodynarnics Of a non-ideal interface: Application to

    E-Print Network [OSTI]


    the problem ?nds applications' in hydraulic fracturing, where a ?uid 1s injected through a borehole to open a fracture' in the direction of least principal stress. Ac-

  15. Applied Energy

    E-Print Network [OSTI]


    Feb 14, 2013 ... include deep, salt-water-bearing rock layers, as well as depleted natural gas ... dense ?uid phase (analogous to oil and gas ?elds); (2) residual.

  16. Wave Motion

    E-Print Network [OSTI]

    M. Carcione, F. Cavallini, Simulation of waves in porn-viscoelastic rocks Saturated by immiscible ?uids. Numerical evidence ofa second slow wave,]. Comput.

  17. The MAC-GEO project 1/84 The MAC-GEO project

    E-Print Network [OSTI]

    Rosso, Fabio

    /84 Overview 1 The project 2 Geothermal energy 3 Heat ux in Italy 4 Geothermal areas in Tuscany 5 Mathematical energy production regimes To check the environmental impact of deep geothermal uids extraction process energy production regimes To check the environmental impact of deep geothermal uids extraction process

  18. PPPL3448 PPPL3448 Macroscopic Description Pressureanisotropydriven Collective

    E-Print Network [OSTI]

    theoretical understanding in uence space-charge e#11;ects collective processes detailed stability ###### ####### ########## ######### ########## ########## ### ####### ##### ######## The macroscopic warm- uid model developed Lund Davidson [Phys. Plasmas 3028 (1998)] used in smooth of alternative theoretical mod- such macroscopic models based uid-Maxwell equations, investigating beam

  19. Optimal Estimation of Dynamically Evolving Di usivities Kurt S. Riedel

    E-Print Network [OSTI]

    equations to account for model error [15]. Researchers attempt to model the e#11;ect of microscopic turbulence in plasmas and uids with anomalous di#11;usion coeÆcients. These e#11;ective equations for uid ow are only an approximation of the actual evolution equations, and in many cases the model error

  20. Linear Dynamics of Double-Porosity Dual-Permeability Materials I. Governing Equations and Acoustic Attenuation

    E-Print Network [OSTI]

    high-pressure regions to the relatively sti#11; low- pressure regions. Such mesoscopic ow attenuates #21; 1 mm). Seismic wavelengths used for oil and gas exploration purposes are typically in the range in their uid pressures. An internal equilibra- tion then takes place with uid owing from the more compliant


    E-Print Network [OSTI]

    Grauer, Rainer

    of equations for a two- uid description of the solar wind plasma and point out possible numerical diÆculties arising from an improper choice of variables. Second, we perform a study of the solar wind expansion mass ejections and/or shocks. Key words: solar wind; MHD; numerical simulation; two- uid modeling

  2. IMIPreprint Series MATHEMATICS

    E-Print Network [OSTI]

    South Carolina, University of

    to a strongly coupled system of a degenerated nonlinear advection-di usion equation for saturation,operator-splittingtechnique in e ectively solving two-phase uid ow problems DEES90, EE87]. In practice, a reservoir often consists-phase ows with interfaces ?]. However, in the case of two-phase uid ows the saturation equation itself

  3. JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER Vol. 13, No. 4, OctoberDecember 1999

    E-Print Network [OSTI]

    Xu, Xianfan

    , it has been proposed that nanometer-sizedparticles could be suspended in industrial heat transfer uidsJOURNAL OF THERMOPHYSICS AND HEAT TRANSFER Vol. 13, No. 4, October­December 1999 Thermal in water, vacuum pump uid, engine oil, and ethylene glycol. Experimental results show that the thermal

  4. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 2006; 50:10031027

    E-Print Network [OSTI]

    Xu, Kun

    models in use for the simulation of certain uid ow phenomena. Dam-break waves, bore wave propagation, hydraulic jumps, roll-waves in open channel ow, waves breaking on sloping beaches, among others, can indicates hydraulic jumps or bores when they occur on the surface of hydraulic uid and is comparable

  5. Atmos. Chem. Phys., 13, 1118711194, 2013

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    ) are found in the troposphere. In the stratosphere, liq- uid aerosols originate from gases like carbonyl sulfide (OCS) (Brühl et al., 2012) and sulfur dioxide (SO2), which are re- leased during volcanic

  6. Numerical Modeling of Hydraulic Fracturing in Oil Sands

    E-Print Network [OSTI]


    as follows. First, a neat uid, such as water (called. 1. ... Department of Civil and Environmental Engineering,. University ... thick deposits in deep and semi-deep underground layers. ... hydrofracturing, in which hot water/steam is injected into the ...

  7. Relationship of compaction bands in Utah to Laramide fault-related folding Richard A. Schultz

    E-Print Network [OSTI]

    Geomechanics--Rock Fracture Group, Department of Geological Sciences and Engineering/172, University of Nevada localization in rock that can impede subsurface uid ow and thus are also important to groundwater and petroleum


    E-Print Network [OSTI]

    perature gradient leads unconditionally to ?uid motion in permeable rocks .... basins developed in a continental setting characterized by debris ?ows ...... Society of Petroleum Engineers, 11,. 399405. .... ground surface topography. Transport in ...

  9. Physica A 295 (2001) 1730

    E-Print Network [OSTI]

    Stanley, H. Eugene


    that may be necessary to move statistical physics from the description of idealized ows in the limit away (e.g., 1 km) from the original well and pumping some other uid, such as water, into this second

  10. Vascular pathology in the aged human brain

    E-Print Network [OSTI]

    Grinberg, Lea Tenenholz; Thal, Dietmar Rudolf


    vascular pathology, and the AD brain. Neurology 65: 259–265brospinal ?uid from the rat brain. Acta Neuropathol (Berl)and Alzheimer’s disease in the brains of elderly individuals

  11. Identification of toxicants in cinnamon-flavored electronic cigarette refill fluids

    E-Print Network [OSTI]

    Talbot, Prue


    on the Ruyan e-cigarette cartridge and inhaled aerosol.of electronic cigarette cartridges, re?ll solutions, andEC consisted of a cartridge with nicotine-containing ?uid


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

    rig. This Technical Specification defines the technical requirement for the design, manufacture, supply and delivery of a Large Seal Test Rig for that purpose. IDM UID R7WQNK...

  13. How to align field guides and standards to the Standard Work...

    Office of Environmental Management (EM)

    P rogram Q uality W ork P lan Training a nd T echnical A ssistance Aligning E xis,ng F ield G uides --- S tep 1 : I den,fy T opics Air Sealing and Insulating Attic Access 56...

  14. Modeling Ozone Removal to Indoor Materials, Including the Effects of Porosity, Pore Diameter, and Thickness

    E-Print Network [OSTI]

    Gall, Elliott T; Siegel, Jeffrey A; Corsi, Richard L


    C. Ozone deposition velocities, reaction probabilities andreaction phenomena described by a single parameter, the ozone deposition velocity,velocity, v t (m h ?1 ), a characteristic of the ?uid mechanics of a space, and the reaction

  15. Displacement speeds in turbulent premixed flame simulations

    E-Print Network [OSTI]

    Day, Marcus S.; Shepherd, Ian G.; Bell, J.; Grcar, Joseph F.; Lijewski, Michael J.


    elds for reaction rate progress and ?uid velocity. Thefor the velocity ?elds and the scalar measure of reactionvelocity and the temperature. To evaluate the displacement speed we de?ne a reaction

  16. Seismic stimulation for enhanced oil recovery

    E-Print Network [OSTI]

    Pride, S.R.


    M. , and Z. Wang, 1992, Seismic properties of pore ?uids:2005, Relationships between seismic and hydrological proper-by d/dt ? ? / ? t ? u · ?. Seismic stimulation Biot, M. A. ,

  17. Taming jets in magnetised fluids

    E-Print Network [OSTI]

    Kosuga, Yusuke; Brummell, Nicholas


    Down right: Cancellation of stresses and quenching of Reynolds stress driven jets, since both ?ux expulsion andTaming Jets in magnetized ?uids Y. Kosuga 1 and N. H.

  18. Date: 415/2010 11:26:19 AM Call #: 624.102854 C7395

    E-Print Network [OSTI]

    It is well known that when two ?uids are in contact there exists a tension in the ... angles and the characteristics of the porous medium such as porosity ... functions

  19. Biomedical Microdevices 3:3, 201209, 2001 # 2001 Kluwer Academic Publishers. Manufactured in The Netherlands.

    E-Print Network [OSTI]

    Bashir, Rashid

    of the live microorganism Listeria innocua injected into the chip demonstrate an easy method for detecting of small quantities of pathogenic bacteria or toxigenic substances in food, bodily ¯uids, tissue samples, soil, etc. In applications such as the screening of food products for the presence of pathogenic

  20. Experimental constraints on the diagenetic self-sealing capacity of faults in high porosity rocks

    E-Print Network [OSTI]

    of £uids in the subsurface. Thus predicting their hydraulic behaviour has become a major pursuit in recent £ow; contami- nant transport; and geothermal energy produc- tion) as well as geological (e.g. crack that control the hydraulic properties of 0012-821X / 00 / $ ^ see front matter ß 2000 Elsevier Science B.V. All

  1. arXiv:hepex/0109015 CLNS 01/1754

    E-Print Network [OSTI]

    -end sig- nal processing chips, with a combined power output of #24;360 W. The drift chamber's heat sources coolant-control platforms provides independent and regulated heat removal from four recently upgraded: the suitability of using the aliphatic-hydrocarbon solvent PF TM -200IG as a heat-transfer uid, the sensor

  2. The Cognitive Ergonomics Laboratory NSF Information Technology

    E-Print Network [OSTI]

    Kaber, David B.

    The Cognitive Ergonomics Laboratory NSF Information Technology Research (ITR) Annual Review David B Ergonomics Laboratory #12;Research Assistants w Becca Green (IE) - Cognitive task analysis (CTA); abstraction hierarchy (AH) modeling; user interface design (UID) evaluation and recommendations. w Noa Segall (IE) - CTA

  3. Facult' es Universitaires NotreDame de la Paix Namur, Belgium

    E-Print Network [OSTI]

    Farenc, Christelle

    :// Keywords: User Interface for All; Ergonomic rules; Design; Evaluation Abstract: It is widely recognised- opment Environment (UIDE) are compared with ergonomic rules used in evaluation with ERGOVAL, a software Grandgagnage, 21 B­5000 Namur BELGIUM Applying Ergonomic Rules for Interactive Computer Systems Christelle

  4. Faculty of Mathematics and Physics Charles University in Prague

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    theory of the geomagnetic eld source was Gilbert's idea of a permanent magnet within the Earth. It had to the presence of magnetic eld, the motion of the uid generates electric currents, which are responsible for the generation of magnetic eld according to the Ampere law. As we will show in Chapter 2, such a behaviour

  5. Toxicity of nickel to the earthworm and the applicability of the neutral red retention assay

    E-Print Network [OSTI]

    Hopkin, Steve

    of Terrestrial Ecology, Natural Environment Research Council, Monks Wood, Abbots Ripton, Huntingdon and Hopkin, 1996a,b; van Gestel et al., 1989; -1991; -1993), very little information is available) or direct injection of nickel into coelomic ¯uid (Furst et al., 1993). The few studies that have been

  6. Radiative Transfer in Interacting Media J.Kenneth Shultis

    E-Print Network [OSTI]

    Shultis, J. Kenneth

    can a ect the uid ow e.g., shock phenomena, energy loss from thermonuclear plasmas, combustion studies accelerated by neutron and high-energy photon transport methods for both military and civilian applications of nuclear energy. Today, radiative transport plays an important role in many other areas besides nuclear

  7. An Efficient Nonlinear Structural Dynamics Solver for Use in Computational Aeroelastic Analysis 

    E-Print Network [OSTI]

    Freno, Brian Andrew


    . Ultimately, these equations are coupled with a uid dynamics solver to provide a structurally e cient aeroelastic program. v ACKNOWLEDGMENTS I would like to thank my advisor, Dr. Paul Cizmas as well as the members of my committee. I was fortunate to have... and unending support. They are the reason for my success. vi TABLE OF CONTENTS Page ABSTRACT : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : iii ACKNOWLEDGMENTS : : : : : : : : : : : : : : : : : : : : : : : : : : : : : v TABLE...

  8. KINEMATIC FAST DYNAMO PROBLEMS Stars and planets possess magnetic elds that permanently change. Earth, for

    E-Print Network [OSTI]

    Khesin, Boris A.

    CHAPTER V KINEMATIC FAST DYNAMO PROBLEMS Stars and planets possess magnetic elds that permanently that the time pattern of the switches forms a Cantor-type set on the time scale (see AnS]). The mechanism the subject of dynamo theory. Kinematic dynamo theory studies what kind of uid motion can induce exponential

  9. Application for Department CalNet Deputy

    E-Print Network [OSTI]

    Alvarez-Cohen, Lisa

    is to the left of the department name for each employee in the directory. Department Name department codes and Department names, go to, and find and click on the record for the employee you wish to have deputized. Their UID is to the right of their name. The 5 digit Processing unit


    E-Print Network [OSTI]

    Gadgil, Ashok Jagannath


    an ement of fluid in a steady laminar flow, can be used tolaminar, the f1uid flows along streamli defined by *For steady flow~ fluid particles flowlaminar boundary layer thickness, L v'Re RECIRCULATING FLOW INDUCED IN A FLUID

  11. On the Collapse of Tubes Carried by 3D Incompressible Flows

    E-Print Network [OSTI]

    Euler solution is a con- stricting vortex tube. Recall that a vortex line in a uid is an arc on an integral curve of the vorticity !(x; t) for #12;xed t, and a vortex tube is a tubular neighborhood in R 3 #12; On the Collapse of Tubes Carried by 3D Incompressible Flows 2 routinely sees that vortex tubes

  12. Characterization of the regulatory mechanism controlling phytotoxin production by Pseudomonas syringae pv. syringae 

    E-Print Network [OSTI]

    Wang, Nian


    analyses of the syrB1::uidA reporter with �²-glucuronidase (GUS) assays. A 20-bp conserved sequence (TGTCccgN4cggGACA) with dyad symmetry around the -35 region was identified via computer analysis for the syr-syp genes/operons responsible for biosynthesis...

  13. Physica A 274 (1999) 6066

    E-Print Network [OSTI]

    Stanley, H. Eugene


    drilling costs [7], simulated annealing is used to optimise business decisions adding hundreds of millions to the oil industry: predicting oil recovery using percolation theory P.R. Kinga; , S.V. Buldyrevb , N to the problem of estimating the time for a uid injected into an oil ÿeld (for the purposes of recovering the oil

  14. Optimal Design for Problems Involving Flow and Transport Phenomena in Saturated

    E-Print Network [OSTI]

    of injection wells p set of model parameters q Darcy velocity, or volumetric ux p uid pressure q y ; q z maximum injection rate Q T total net pumping rate rate Q e T total extraction rate Q max T maximum total

  15. 24 December 1998 Z .Physics Letters B 444 1998 231236

    E-Print Network [OSTI]

    Bauer, Wolfgang

    , Faculty of Sci- ence, Department of Physics, Abbassia 11566, Cairo, Egypt. had some success in modeling by fractal shapes. In contrast, the liq- uid-gas phase transition is first order, and clusters can appear far lattice gas model 17,1

  16. GwElrimicaet C~~rn~imim Acfa Vol. 55, pp. 18374858 Copyright0 1991 Paganon Rw pk. Printedin U.S.A.

    E-Print Network [OSTI]

    Zhu, Chen

    be sampled, such as geothermal fluids, hot springs, and oil- field brines, are limited to low temperature-low of temperatures and pressures for apportion to geochemistry, igneous and rne~o~~c petrology, and ore deposits&ems containing apatites, show that the partitioning is a strong function of temperature, pressure, and 5uid

  17. Report no. 98/18 Adjoint recovery of superconvergent

    E-Print Network [OSTI]

    Giles, Mike

    . . . . . . . . . . . . . . . . . 28 #12;3 1 Introduction In aeronautical applications of computational uid dynamics (CFD), engineers?) in order to make design changes which will improve the lift or drag. Other areas of CFD analysis also have in combustion modeling, or the net seepage of a pollutant into an aquifer when modeling soil contamination

  18. second gun the steel lining was dispensed with as being

    E-Print Network [OSTI]

    effectually packed the joint,preventing any escape of gas. The vent for "ring ... Let us next examine the resisting ... iron in opposition to an area of the ?uid measuring one square inch ..... 56-15-ng coo/wad export a previously formed steel wing. A. (J-pdr. ... force exerted upon the projectile to overcome its natural vis inertiae ...

  19. Hydrogeology, chemical and microbial activity measurement through deep permafrost

    E-Print Network [OSTI]

    Stotler, R.L.


    L), re?ecting the Ca-salt drilling ?uid used at High Lake.values as the salt used to form the drilling brine (? ? 0.4‰salt used to mix the drill brine for clearing the hole prior to drilling,

  20. Dynamical Instabilities of the Randall{Sundrum Model Timon Boehm1, Ruth Durrer1 and Carsten van de Bruck2

    E-Print Network [OSTI]

    Durrer, Ruth

    charges and end on so-called Dp{branes, p + 1 dimensional hyper-surfaces of the full spacetime{string theories and especially M{theory suggest that the observable universe is a 3 + 1 dimensional hyper in a ve dimensional bulk. First, we show that a scalar eld or an arbitrary uid on the brane cannot evolve

  1. Active microuidic mixer and gas bubble lter driven by thermal bubble micropump$

    E-Print Network [OSTI]

    Lin, Liwei

    Active micro¯uidic mixer and gas bubble ®lter driven by thermal bubble micropump$ Jr-Hung Tsaia interface to increase the contact area of mixing ¯uids to accelerate the mixing process. The micro and successfully demonstrated in the micro¯uidic mixing system. A model based on the principle of threshold

  2. The Open Optics Journal, 2008, 2, 86-93 86 1874-3285/08 2008 Bentham Open

    E-Print Network [OSTI]

    Lin, Qiao

    molecules. It is apparent that the bending is inversely proportional to the Young's modulus of the canti, USA Abstract: This paper reports the development of optical lever based parylene cantilevers mode (static bending). Because of its ability to operate in both liq- uid and air, the static mode

  3. Computational Molecular Biology Biochem 218 BioMedical Informatics 231

    E-Print Network [OSTI]

    .edu/ Doug Brutlag Professor Emeritus Biochemistry & Medicine (by courtesy) The Human Genome Project #12 Gibson & Muse, A Primer of Genome Science #12;The Human Genome Project?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=3294162 #12;Public Genome Assembly Process #12;BAC and PAC Libraries in Public Human Genome Project http

  4. The formulation of quantum statistical mechanics based on the Feynman path centroid density. V. Quantum instantaneous normal mode

    E-Print Network [OSTI]

    Cao, Jianshu

    The formulation of quantum statistical mechanics based on the Feynman path centroid density. V regime using the Feynman path centroid perspective in quantum statistical mechanics. To accomplish of their lack of static and stable structures. The fluidity of liq- uids thereby makes it formally improper

  5. Phytoplankton blooms and sh recruitment rate: E ects of spatial distribution

    E-Print Network [OSTI]

    Biktashev, Vadim N.

    Department of Mathematical Sciences, M&O Building, Peach street, University of Liverpool, Liverpool L69 7ZL and plankton may be regarded as passive tracers of the uid motion, dispersed and mixed by the turbulent di#11 of Mathematical Sciences, M&O Building, Peach street, University of Liverpool, Liverpool L69 7ZL, UK Preprint

  6. Illinois State University Office of Human Resources

    E-Print Network [OSTI]

    Branoff, Theodore J.

    of commitment to unit mission/vision; willingness to share knowledge/mentor co-workers. DIVERSITY: Comment Appraisal and Development Review Name: Period Covered: Classification: Department: UID, and logical manner? Are activities planned ahead of time and commitments met? How well do plans fit

  7. Report no. 00/04 An introduction to the adjoint approach to design

    E-Print Network [OSTI]

    Pierce, Niles A.

    Computing Laboratory Numerical Analysis Group Wolfson Building Parks Road Oxford, England OX1 3QD March University Computing Laboratory, Oxford, OX1 3QD, UK. Niles A. Pierce California Institute of Technology are an active area of research in computational uid dynamics, particularly for aeronautical applications

  8. Exact results for generalized Gassmann's equations in composite

    E-Print Network [OSTI]

    and the bulk modulus K #30; associated with the pore volume when the uid pressure (p f ) and con#12;ning pressure (p) are increased, keeping the di#11;erential pressure (p d = p p f ) #12;xed. These moduli conglomerate and the drained phases, and the porosities in each phase. The pore structure of each phase

  9. Seismicity induced by seasonal groundwater recharge at Mt. Hood, Oregon

    E-Print Network [OSTI]

    Manga, Michael

    and narrow-width pore-fluid pressure signal. Time delays between this seasonal groundwater recharge-fluid pressure fraction, PP/P0W0.1, of the applied near-surface pore-fluid pressure perturbation, P0W0.1 MPa Elsevier B.V. All rights reserved. Keywords: hydroseismicity; groundwater; pore-£uid pressure; permeability

  10. Aquatic Toxicology 91 (2009) 179186 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    Hopkins, William A.


    following combustion of petroleum and coal is rich in numerous toxic trace elements which may by liberated to aquatic and terrestrial systems and the atmosphere through release of liq- uid or solid combustion wastes worldwide will bring increased release of associated contaminants to air, water, and soils. Fly ash produced

  11. Typeset with jpsj2.cls Full Paper Dynamics of Phase Separation in Con ned Two-component Fluid

    E-Print Network [OSTI]

    Sano, Masaki

    Typeset with jpsj2.cls Full Paper Dynamics of Phase Separation in Con#12;ned Two are mainly controlled by the bending energy with small surface tension. 1) The resulting uid-like in. For example, the detailed calculations of the bending and curvature rigidities of a bilayer membrane

  12. Understanding and Improving App Installation Security Mechanisms through Empirical Analysis of Android

    E-Print Network [OSTI]

    Van Oorschot, Paul

    of Android David Barrera Jeremy Clark Daniel McCarney Paul C. van Oorschot School of Computer Science of the security decisions made by the Android op- erating system during the app installation process: update integrity and UID assignment. To inform our analysis, we collect a dataset of Android application metadata


    E-Print Network [OSTI]

    of uid ow and contaminant transport in the subsurface. For instance, in the case of buried nuclear waste-level radioactive contaminants. This puts heavy constraints on numerical models. Detailed spatial vari- This paper of this work are based on previous research conducted while the author was at the Center for Nuclear Waste

  14. Enrichment strategies and convergence properties of the XFEM for hydraulic fracture problems

    E-Print Network [OSTI]

    Peirce, Anthony

    Enrichment strategies and convergence properties of the XFEM for hydraulic fracture problems Finite Ele- ment Method (XFEM) for modeling hydraulic fractures (HF), two classes of boundary value energy, is not suitable for modeling hydraulic fractures in which the uid and the fracture fronts

  15. 16 CSA News March 2013 thanol from corn has been the primary biofuel for liq-

    E-Print Network [OSTI]

    DeLucia, Evan H.

    16 CSA News March 2013 E thanol from corn has been the primary biofuel for liq- uid fuels in the United States, but perennial cellulosic biofuels are on the horizon. Intensive corn production with large of nitrogen losses on large, tile-drained fields planted with perennial biofuels in the Midwest of the United

  16. Chapter 2' First order Differential Equations I 2,] Linear Equations ...

    E-Print Network [OSTI]

    1' _ _ , Draw a direction ?eld for the given differential equation. I- a - - - - "/4 ..... in solution. Water containing 1 lb of salt per gallon is entering at a rate of 3 g ..... A body falling in a relatively dense ?uid, oil for example, is acted on by three forces.


    E-Print Network [OSTI]

    Russell, Thomas F.

    RESERVOIR SIMULATION USING MIXED METHODS, A MODIFIED METHOD CHARACTERISTICS, AND LOCAL GRID Mathematical models for reservoir ow are governed by partial di#11;erential equations whose solution may v is the total Darcy velocity, p the total uid pressure [6], S denotes the saturation of water

  18. Level Set Based Simulations of Two-Phase Oil-Water Flows in Pipes

    E-Print Network [OSTI]

    Soatto, Stefano

    the assumption that the densities of the two uids are di#11;erent and that the viscosity of the oil core is veryLevel Set Based Simulations of Two-Phase Oil-Water Flows in Pipes Hyeseon Shim July 31, 2000 Abstract We simulate the axisymmetric pipeline transportation of oil and water numerically under

  19. Computational Solid Mechanics using a Vertex-based Finite Volume Method

    E-Print Network [OSTI]

    Taylor, Gary

    Computational Solid Mechanics using a Vertex-based Finite Volume Method G. A. Taylor, C. Bailey and using nite volume (FV) methods for computational solid mechanics (CSM). These methods are proving]. As a contemporary, the FV method has similarlyestablished itself within the eld of computational uid dynamics (CFD

  20. Copyright c 200x Tech Science Press CMES, vol.x, no.x, pp.1-12, 200x Perfectly matched layer for acoustic waveguide modeling --benchmark

    E-Print Network [OSTI]

    Lu, Ya Yan

    waveg- uides, one-way wave equations. 1 Introduction As a simple model used in ocean acoustics [Jensen layer. In numerical sim- ulations for sound waves in the ocean, for example using the Parabolic Equation to solve a range- dependent benchmark problem (wedge with penetrable bottoms) [Jensen and Ferla (1990

  1. Stabilization of tokamak plasma by lithium streams L. E. Zakharov,

    E-Print Network [OSTI]

    Zakharov, Leonid E.

    -boundary magnetohydrodynamic instabilities in tokamaks by liquid lithium streams driven by magnetic propulsion is formulated proposed a mechanism of magnetic propulsion for driving fast lithium streams along the plasma facing by an external power source and B is the tokamak magnetic #12;eld. The magnetic pressure, created in the uid

  2. Subsurface Trapping of Oil Plumes in Stratification: Laboratory Investigations David Adalsteinsson,1,2,3

    E-Print Network [OSTI]

    Camassa, Roberto

    Subsurface Trapping of Oil Plumes in Stratification: Laboratory Investigations David Adalsteinsson the Deepwater Horizon Gulf oil spill can be trapped as they rise through an ambient, strati ed uid. The addition and theory on trapping/escape of plumes containing an oil/water/surfactant mixture released into nonlinear

  3. Low temperature London penetration depth and superfluid density in Fe-based superconductors

    SciTech Connect (OSTI)

    Kim, Hyunsoo


    The superconducting gap symmetry of the Fe-based superconductors was studied by measurements and analysis of London penetration depth and super uid density. Tunnel diode resonator technique for these measurements was implemented in a dilution refrigerator allowing for the temperatures down to 50 mK. For the analysis of the super uid density, we used both experimental studies of Al-coated samples and original thermodynamic approach based on Rutgers relation. In three systems studied, we found that the superconducting gap at the optimal doping is best described in multi-gap full gap scenario. By performing experiments on samples with arti#12;cially introduced disorder with heavy ion irradiation, we show that evolution of the superconducting transition temperature and of the super uid density are consistent with full-gap sign changing s#6; superconducting state. The superconducting gap develops strong modulation both in the under-doped and the over-doped regimes. In the terminal hole-doped KFe{sub 2}As{sub 2}, both temperature dependence of the super uid density and its evolution with increase of the scattering rate are consistent with symmetry imposed vertical line nodes in the superconducting gap. By comparative studies of hole-doped (Ba,K)Fe{sub 2}As{sub 2} and electron-doped Ca10-3-8, we show that the superconducting gap modulation in the under-doped regime is intrinsic and is not induced by the coexisting static magnetic order.

  4. APS/123-QED Force balance at the transition from selective withdrawal to viscous entrainment

    E-Print Network [OSTI]

    Gardel, Margaret

    APS/123-QED Force balance at the transition from selective withdrawal to viscous entrainment Fran- uid from the upper layer is withdrawn, is thus succeeded by the viscous entrainment regime, in which) Selective withdrawal and viscous entrainment regimes (superposed images). Liquid is withdrawn at vol- ume


    E-Print Network [OSTI]



    E-Print Network [OSTI]


  7. Frenkel Line and Solubility Maximum in Supercritical Fluids

    E-Print Network [OSTI]

    C. Yang; V. V. Brazhkin; M. T. Dove; K. Trachenko


    A new dynamic line, the Frenkel line, has recently been proposed to separate the supercritical state into rigid-liquid and non-rigid gas-like uid. The location of Frenkel line on the phase diagram is unknown for real uids. Here, we map the Frenkel line for three important systems: CO2, H2O and CH4. This provides an important demarcation on the phase diagram of these systems, the demarcation that separates two distinct physical states with liquid-like and gas-like properties. We ?nd that the Frenkel line can have similar trend as the melting line above the critical pressure. Moreover, we discuss the relationship between unexplained solubility maxima and Frenkel line, and propose that the Frenkel line corresponds to the optimal conditions for solubility.

  8. Effect of temperature on resonance of impellers 

    E-Print Network [OSTI]

    Dave, Ashok M


    Total dynamic force Stiffness Mass Phase angle Time Displacement Velocity Acceleration CHAPTER I. INTROOUCT ION Machinery vibration levels are directly related to its operating conditions. In 90'5 of operational failures, the machines.... The blade shapes are very complex and their characteristics differ from each other. Sources of Vibration There are several sources of vibrations in plants containing process-f1uid machinery. The machine vibrations are transmitted to connecting piping...

  9. Non-smooth Dynamics Using Differential-algebraic Equations Perspective: Modeling and Numerical Solutions 

    E-Print Network [OSTI]

    Gotika, Priyanka


    : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 73 ix LIST OF FIGURES FIGURE Page 1 Constitutive relation for Bingham-type uid. Force due to dash- pot cannot be written as a function of kinematic variables (that is, velocity of the mass). On the other hand, as shown in the gure, velocity... of constitutive relation between velocity and force due to dash-pot for a dash-pot governed by visco-elastic model. : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 9 5 A pictorial representation of constitutive relation between velocity...

  10. Exact Anisotropic Solutions of the Generalized TOV Equation

    E-Print Network [OSTI]

    Riazi, Nematollah; Sajadi, S Naseh; Assyaee, S Shahrokh


    We explore gravitating relativistic spheres composed of an anisotropic, barotropic uid. We assume a bi-polytropic equation of state which has a linear and a power-law terms. The generalized Tolman-Oppenheimer-Volkoff (TOV) equation which describes the hydrostatic equilibrium is obtained. The full system of equations are solved for solutions which are regular at the origin and asymptotically flat. Conditions for the appearance of horizon and a basic treatment of stability are also discussed.

  11. Supercritical Fluid Extraction- Process Simulation and Design 

    E-Print Network [OSTI]

    Martin, C. L.; Seibert, A. F.


    N'''"? SF( F[ED Sfr FHO CXTRACT [nUCT REFERENCES ? P'US( L nUl 0 LloUID lIQUID l'DUID I IIU[1It '41.9'11'9' 9U.'99li' ~5.l00' ~.(lOOO 2' ,Pl 1. G. Brunner, paper presented at San Fran 52.0000 52.0000 ~o. DDOI :n.~DO' :s tOl '.0000 0...

  12. Electrostatically Directed Self-Assembly of Ultrathin Supramolecular Polymer Microcapsules

    E-Print Network [OSTI]

    Parker, Richard M.; Zhang, Jing; Zheng, Yu; Coulston, Roger J.; Smith, Clive A.; Salmon, Andrew R.; Yu, Ziyi; Scherman, Oren A.; Abell, Chris


    by bulk emulsifi cation tech- niques often exhibit high polydispersity. [ 23 ] The microemulsion of immiscible fl uids offers an alternative route to hollow microcapsules, with the interfa- cial polymerization of segregated monomer solutions widely... guests, through multiple noncovalent interactions. [ 36 ] Their extremely high affi nity in water is reported to be driven by the release of high energy water from the CB[8] cavity. [ 37 ] A key step in the development of this approach is to gener...


    SciTech Connect (OSTI)

    Hanks, D.


    Over 40 industrial facilities world-wide use standardized uranium hexafluoride (UF{sub 6}) cylinders for transport, storage and in-process receiving in support of uranium conversion, enrichment and fuel fabrication processes. UF{sub 6} is processed and stored in the cylinders, with over 50,000 tU of UF{sub 6} transported each year in these International Organization for Standardization (ISO) qualified containers. Although each cylinder is manufactured to an ISO standard that calls for a nameplate with the manufacturer's identification number (ID) and the owner's serial number engraved on it, these can be quite small and difficult to read. Recognizing that each facility seems to use a different ID, a cylinder can have several different numbers recorded on it by means of metal plates, sticky labels, paint or even marker pen as it travels among facilities around the world. The idea of monitoring movements of UF{sub 6} cylinders throughout the global uranium fuel cycle has become a significant issue among industrial and safeguarding stakeholders. Global monitoring would provide the locations, movements, and uses of cylinders in commercial nuclear transport around the world, improving the efficiency of industrial operations while increasing the assurance that growing nuclear commerce does not result in the loss or misuse of cylinders. It should be noted that a unique ID (UID) attached to a cylinder in a verifiable manner is necessary for safeguarding needs and ensuring positive ID, but not sufficient for an effective global monitoring system. Modern technologies for tracking and inventory control can pair the UID with sensors and secure data storage for content information and complete continuity of knowledge over the cylinder. This paper will describe how the next steps in development of an action plan for employing a global UF{sub 6} cylinder monitoring network could be cultivated using four primary UID functions - identification, tracking, controlling, and accounting.

  14. Smoothed particle hydrodynamics Non-Newtonian model for ice-sheet and ice-shelf dynamics

    SciTech Connect (OSTI)

    Pan, Wenxiao; Tartakovsky, Alexandre M.; Monaghan, Joseph J.


    Mathematical modeling of ice sheets is complicated by the non-linearity of the governing equations and boundary conditions. Standard grid-based methods require complex front tracking techniques and have limited capability to handle large material deformations and abrupt changes in bottom topography. As a consequence, numerical methods are usually restricted to shallow ice sheet and ice shelf approximations. We propose a new smoothed particle hydrodynamics (SPH) non-Newtonian model for coupled ice sheet and ice shelf dynamics. SPH, a fully Lagrangian particle method, is highly scalable and its Lagrangian nature and meshless discretization are well suited to the simulation of free surface ?ows, large material deformation, and material fragmentation. In this paper, SPH is used to study 3D ice sheet/ice shelf behavior, and the dynamics of the grounding line. The steady state position of the grounding line obtained from SPH simulations is in good agreement with laboratory observations for a wide range of simulated bedrock slopes, and density ratios, similar to those of ice and sea water. The numerical accuracy of the SPH algorithm is veri?ed by simulating Poiseuille ?ow, plane shear ?ow with free surface and the propagation of a blob of ice along a horizontal surface. In the laboratory experiment, the ice was represented with a viscous Newtonian ?uid. In the present work, however, the ice is modeled as both viscous Newtonian ?uid and non-Newtonian ?uid, such that the e?ect of non-Newtonian rheology on the dynamics of grounding line was examined. The non-Newtonian constitutive relation is prescribed to be Glen’s law for the creep of polycrystalline ice. A V-shaped bedrock ramp is further introduced to model the real geometry of bedrock slope.

  15. Technologies for Reducing Nutrients in Dairy Effluent 

    E-Print Network [OSTI]

    Mukhtar, Saqib; Wagner, Kevin; Gregory, Lucas


    in a poly feed tank with mixer and two clarifier tanks. EC system configuration During the first sampling events, many modi- fications were made to the system configuration as Ecoloclean tried to optimize its system. The optimized system is shown... to coagulate and precipi- tate (separate). The liquid then moved to a reaction tank with a mixer that allowed sufficient time for chemical reactions to occur. A pump then moved the liq- uid to a dissolved air flotation (DAF) unit, which introduced small air...

  16. The Design of an Open Rankine-Cycle Industrial Heat Pump 

    E-Print Network [OSTI]

    Leibowitz, H. M.; Chaudoir, D. W.


    from a simulated 150?F clean waste water stream. The plant is based on the Open-Dpen? heat pump concept, i.e., no system evapo rator or condenser. The water vapor is generated by a flash evaporation process. In this heat pump system, shown... schematically in Figure 2, the waste stream supplies the heat energy for the system and also serves as the heat pump working flUid. The waste water stream is directed to a flash evapo rator, where approximately 0.5 to 1% of the stream is vaporized...

  17. Determination of Thermal-Degradation Rates of Some Candidate Rankine-Cycle Organic Working Fluids for Conversion of Industrial Waste Heat Into Power 

    E-Print Network [OSTI]

    Jain, M. L.; Demirgian, J.; Krazinski, J. L.; Bushby, H.; Mattes, H.; Purcell, J.


    -FlUid Loop I The fluid loop consists oE an evap,rator/ superheater section, set of pressure-re~uctlon valves, an economizer unit, a conden er, a metering pump, and a pulsation damper. , Evaporator/Superheater Section This-I section is constructed of 9... the height of the baae Peak is proportional to the pressure of th gas ~n the spectrometer, the spectrum 1.s made at known pressure to determine the s n8iti"ity coeff~cient (i.e., peak height/pressure). The accuracy of analysis depends on var ous factors...

  18. The effects of plate thickness and perforation diameter on the supporting vapor velocity for a perforated plate fractionating column 

    E-Print Network [OSTI]

    Cottle, John Ernest


    &opere poser t-t vari, bio "ransformr. i oo t'. t t!ie ! o-t oii-'? it to ! h liquiu could bo adeustod. "'nis rran, cmont per&aitted t. '. o, . inc. &&ance of t. '. e li&;uid temp rature t iCG P plus or minus 0, 1 P. all liquid aial air temperatures of tlic... without bio"!in, the liquid out of the ma&master and the connections available leaked. Since the plate pressure drop was unimportant ~?ay~, tne manometer was ab ndoned after the first fow r&&ns were mode. In a commercial oolumn r&here liquid...

  19. Modeling and Algorithmic Approaches to Constitutively-Complex, Microstructured Fluids

    SciTech Connect (OSTI)

    Miller, Gregory H.; Forest, Gregory


    We present a new multiscale model for complex uids based on three scales: microscopic, kinetic, and continuum. We choose the microscopic level as Kramers' bead-rod model for polymers, which we describe as a system of stochastic di#11;erential equations with an implicit constraint formulation. The associated Fokker-Planck equation is then derived, and adiabatic elimination removes the fast momentum coordinates. Approached in this way, the kinetic level reduces to a dispersive drift equation. The continuum level is modeled with a #12;nite volume Godunov-projection algorithm. We demonstrate computation of viscoelastic stress divergence using this multiscale approach.

  20. Evaluation of synthetic aggregates for use in concrete 

    E-Print Network [OSTI]

    Ahmad, Hafizuddin


    ), ab"orption- saturation charactcri. , tice, uid dry loose unit weight we ?' made. To study thc mechanical durability of the aggregaIes Lo. Angeles and Texas sandblast abrasion tests were made. Potential reactivity, pressure slaking, and sodium... advantage over. the pressure slaking I. est. 4. Both potential. reactivity test (PSTM C289) and Na011 test exhibited simi1ar r;lationships betmeen firing temperature and re- duction in alitalinity. 5, Los Angeles Lest method (PSTM C13f) did not produce...

  1. Fractured: Experts examine the contentious issue of hydraulic fracturing water use 

    E-Print Network [OSTI]

    Wythe, Kathy


    Story by Kathy Wythe FRACTURED Experts examine the contentious issue of hydraulic fracturing water use In a state where oil and gas are king, and water is? in words commonly a?ributed to Mark Twain? ?for ?ghting over,? an unconventional method... that uses water to extract oil and gas from Texas? underground ?elds is causing passionate debate. ?is method?hydraulic fracturing?uses water and other ?uids under pressure to fracture or crack shale rock, releasing oil and gas from the rock. Combined...

  2. Inverse problem in anisotropic poroelasticity: Drained constants from undrained ultrasound measurements

    SciTech Connect (OSTI)

    Berryman, J.G.; Nakagawa, S.


    Poroelastic analysis has traditionally focused on the relationship between dry or drained constants which are assumed known and the saturated or undrained constants which are assumed unknown. However, there are many applications in this field of study for which the main measurements can only be made on the saturated/undrained system, and then it is uncertain what the eects of the uids were on the system, since the drained constants remain a mystery. The work presented here shows how to deduce drained constants from undrained constants for anisotropic systems having symmetries ranging from isotropic to orthotropic. Laboratory ultrasound data are then inverted for the drained constants in three granular packings: one of glass beads, and two others for distinct types of more or less angular sand grain packings. Experiments were performed under uniaxial stress, which resulted in hexagonal (transversely isotropic) symmetry of the poroelastic response. One important conclusion from the general analysis is that the drained constants are uniquely related to the undrained constants, assuming that porosity, grain bulk modulus, and pore uid bulk modulus are already known. Since the resulting system of equations for all the drained constants is linear, measurement error in undrained constants also propagates linearly into the computed drained constants.

  3. Parametric Instabilities in Shallow Water Magnetohydrodynamics Of Astrophysical Plasma in External Magnetic Field

    E-Print Network [OSTI]

    Klimachkov, Dmitry


    This letter discusses rotating magnetohydrodynamics (MHD) of a thin layer of astrophysical plasma. To describe a thin plasma layer with a free surface in a vertical external magnetic field we use the shallow water ap- proximation. The presence of a vertical magnetic field essentially changed the wave processes dynamics in astrophysical plasma compared to the neu- tral uid and plasma layer in a thoroidal magnetic field. In present case thre are three-waves nonlinear interactions. Using the asymptotic mul- tiscale we deduced nonlinear wave packets interaction equations: three magneto-Poincare waves interaction, three magnetostrophic waves inter- action, the interaction of two magneto-Poincare and one magnetostrophic wave and two magnetostrophic and one magneto-Poincare wave interac- tion. The existence of decay instabilities and parametric amplifications is predicted. We found following four types of decay instabilities: magneto- Poincare wave decays into two magneto-Poincare waves, magnetostrophic wave decays ...

  4. Moving-Boundary Heat Exchanger Models with Variable Outlet Phase, ASME Journal of Dynamic Systems, Measurement, and Control 

    E-Print Network [OSTI]

    Eldredge, B.D; Rasmussen, B.P.; Alleyne, A.


    a w r yna 115 uid 1 c A s c s p e r t i p m t e e i c number of elements results in a dynamically complex model that may be computationally expensive and is unsuitable for model- based control design ?3?. e g l n d t m i t b r G a d principles...:// ?L LT ???Acs? ?t dz = Acs ? d dt?L LT ???dz + ?gL? 1 ? ?31? A t E p N c e B A v A T I a E E ? L LT ??m?h? ?z dz = m?outhout ? m?inthint ?40? J l Dow ESL-PA-08-11-011 1 ssume that the lumped density can be evaluated as a function of he void fraction...

  5. Fast Computation of Solvation Free Energies with Molecular Density Functional Theory: Thermodynamic-Ensemble Partial Molar Volume Corrections

    E-Print Network [OSTI]

    Volodymyr P. Sergiievskyi; Guillaume Jeanmairet; Maximilien Levesque; Daniel Borgis


    Molecular Density Functional Theory (MDFT) offers an efficient implicit- solvent method to estimate molecule solvation free-energies whereas conserving a fully molecular representation of the solvent. Even within a second order ap- proximation for the free-energy functional, the so-called homogeneous reference uid approximation, we show that the hydration free-energies computed for a dataset of 500 organic compounds are of similar quality as those obtained from molecular dynamics free-energy perturbation simulations, with a computer cost reduced by two to three orders of magnitude. This requires to introduce the proper partial volume correction to transform the results from the grand canoni- cal to the isobaric-isotherm ensemble that is pertinent to experiments. We show that this correction can be extended to 3D-RISM calculations, giving a sound theoretical justifcation to empirical partial molar volume corrections that have been proposed recently.

  6. Simulation information regarding Sandia National Laboratories%3CU%2B2019%3E trinity capability improvement metric.

    SciTech Connect (OSTI)

    Agelastos, Anthony Michael; Lin, Paul T.


    Sandia National Laboratories, Los Alamos National Laboratory, and Lawrence Livermore National Laboratory each selected a representative simulation code to be used as a performance benchmark for the Trinity Capability Improvement Metric. Sandia selected SIERRA Low Mach Module: Nalu, which is a uid dynamics code that solves many variable-density, acoustically incompressible problems of interest spanning from laminar to turbulent ow regimes, since it is fairly representative of implicit codes that have been developed under ASC. The simulations for this metric were performed on the Cielo Cray XE6 platform during dedicated application time and the chosen case utilized 131,072 Cielo cores to perform a canonical turbulent open jet simulation within an approximately 9-billion-elementunstructured- hexahedral computational mesh. This report will document some of the results from these simulations as well as provide instructions to perform these simulations for comparison.

  7. Review of Enabling Technologies to Facilitate Secure Compute Customization

    SciTech Connect (OSTI)

    Aderholdt, Ferrol; Caldwell, Blake A; Hicks, Susan Elaine; Koch, Scott M; Naughton, III, Thomas J; Pelfrey, Daniel S; Pogge, James R; Scott, Stephen L; Shipman, Galen M; Sorrillo, Lawrence


    High performance computing environments are often used for a wide variety of workloads ranging from simulation, data transformation and analysis, and complex workflows to name just a few. These systems may process data for a variety of users, often requiring strong separation between job allocations. There are many challenges to establishing these secure enclaves within the shared infrastructure of high-performance computing (HPC) environments. The isolation mechanisms in the system software are the basic building blocks for enabling secure compute enclaves. There are a variety of approaches and the focus of this report is to review the different virtualization technologies that facilitate the creation of secure compute enclaves. The report reviews current operating system (OS) protection mechanisms and modern virtualization technologies to better understand the performance/isolation properties. We also examine the feasibility of running ``virtualized'' computing resources as non-privileged users, and providing controlled administrative permissions for standard users running within a virtualized context. Our examination includes technologies such as Linux containers (LXC [32], Docker [15]) and full virtualization (KVM [26], Xen [5]). We categorize these different approaches to virtualization into two broad groups: OS-level virtualization and system-level virtualization. The OS-level virtualization uses containers to allow a single OS kernel to be partitioned to create Virtual Environments (VE), e.g., LXC. The resources within the host's kernel are only virtualized in the sense of separate namespaces. In contrast, system-level virtualization uses hypervisors to manage multiple OS kernels and virtualize the physical resources (hardware) to create Virtual Machines (VM), e.g., Xen, KVM. This terminology of VE and VM, detailed in Section 2, is used throughout the report to distinguish between the two different approaches to providing virtualized execution environments. As part of our technology review we analyzed several current virtualization solutions to assess their vulnerabilities. This included a review of common vulnerabilities and exposures (CVEs) for Xen, KVM, LXC and Docker to gauge their susceptibility to different attacks. The complete details are provided in Section 5 on page 33. Based on this review we concluded that system-level virtualization solutions have many more vulnerabilities than OS level virtualization solutions. As such, security mechanisms like sVirt (Section 3.3) should be considered when using system-level virtualization solutions in order to protect the host against exploits. The majority of vulnerabilities related to KVM, LXC, and Docker are in specific regions of the system. Therefore, future "zero day attacks" are likely to be in the same regions, which suggests that protecting these areas can simplify the protection of the host and maintain the isolation between users. The evaluations of virtualization technologies done thus far are discussed in Section 4. This includes experiments with 'user' namespaces in VEs, which provides the ability to isolate user privileges and allow a user to run with different UIDs within the container while mapping them to non-privileged UIDs in the host. We have identified Linux namespaces as a promising mechanism to isolate shared resources, while maintaining good performance. In Section 4.1 we describe our tests with LXC as a non-root user and leveraging namespaces to control UID/GID mappings and support controlled sharing of parallel file-systems. We highlight several of these namespace capabilities in Section 6.2.3. The other evaluations that were performed during this initial phase of work provide baseline performance data for comparing VEs and VMs to purely native execution. In Section 4.2 we performed tests using the High-Performance Computing Conjugate Gradient (HPCCG) benchmark to establish baseline performance for a scientific application when run on the Native (host) machine in contrast with execution under Docker and KVM. Our tests verified prior studie

  8. Equilibrium Fluid-Crystal Interfacial Free Energy of Bcc-Crystallizing Aqueous Suspensions of Polydisperse Charged Spheres

    E-Print Network [OSTI]

    Thomas Palberg; Patrick Wette; Dieter M. Herlach


    The interfacial free energy is a central quantity in crystallization from the meta-stable melt. In suspensions of charged colloidal spheres, nucleation and growth kinetics can be accurately measured from optical experiments. In previous work, from this data effective non-equilibrium values for the interfacial free energy between the emerging bcc-nuclei and the adjacent melt in dependence on the chemical potential difference between melt phase and crystal phase were derived using classical nucleation theory. A strictly linear increase of the interfacial free energy was observed as a function of increased meta-stability. Here, we further analyze this data for five aqueous suspensions of charged spheres and one binary mixture. We utilize a simple extrapolation scheme and interpret our findings in view of Turnbull's empirical rule. Our first estimates for the reduced interfacial free energy, $\\sigma_{0,bcc}$, between coexisting equilibrium uid and bcc-crystal phases are on the order of a few $k_BT$. Their values are not correlated to any of the electrostatic interaction parameters but rather show a systematic decrease with increasing size polydispersity and a lower value for the mixture as compared to the pure components. At the same time, $\\sigma_0$ also shows an approximately linear correlation to the entropy of freezing. The equilibrium interfacial free energy of strictly monodisperse charged spheres may therefore be still greater.

  9. Magnetic Reconnection

    SciTech Connect (OSTI)

    Masaaki Yamada, Russell Kulsrud and Hantao Ji


    We review the fundamental physics of magnetic reconnection in laboratory and space plasmas, by discussing results from theory, numerical simulations, observations from space satellites, and the recent results from laboratory plasma experiments. After a brief review of the well-known early work, we discuss representative recent experimental and theoretical work and attempt to interpret the essence of significant modern findings. In the area of local reconnection physics, many significant findings have been made with regard to two- uid physics and are related to the cause of fast reconnection. Profiles of the neutral sheet, Hall currents, and the effects of guide field, collisions, and micro-turbulence are discussed to understand the fundamental processes in a local reconnection layer both in space and laboratory plasmas. While the understanding of the global reconnection dynamics is less developed, notable findings have been made on this issue through detailed documentation of magnetic self-organization phenomena in fusion plasmas. Application of magnetic reconnection physics to astrophysical plasmas is also brie y discussed.

  10. Next Generation Safeguards Initiative: Overview and Policy Context of UF6 Cylinder Tracking Program

    SciTech Connect (OSTI)

    Boyer, Brian D; Whitaker, J. Michael; White-Horton, Jessica L.; Durbin, Karyn R.


    Thousands of cylinders containing uranium hexafluoride (UF{sub 6}) move around the world from conversion plants to enrichment plants to fuel fabrication plants, and their contents could be very useful to a country intent on diverting uranium for clandestine use. Each of these large cylinders can contain close to a significant quantity of natural uranium (48Y cylinder) or low-enriched uranium (LEU) (30B cylinder) defined as 75 kg {sup 235}U which can be further clandestinely enriched to produce 1.5 to 2 significant quantities of high enriched uranium (HEU) within weeks or months depending on the scale of the clandestine facility. The National Nuclear Security Administration (NNSA) Next Generation Safeguards Initiative (NGSI) kicked off a 5-year plan in April 2011 to investigate the concept of a unique identification system for UF{sub 6} cylinders and potentially to develop a cylinder tracking system that could be used by facility operators and the International Atomic Energy Agency (IAEA). The goal is to design an integrated solution beneficial to both industry and inspectorates that would improve cylinder operations at the facilities and provide enhanced capabilities to deter and detect both diversion of low-enriched uranium and undeclared enriched uranium production. The 5-year plan consists of six separate incremental tasks: (1) define the problem and establish the requirements for a unique identification (UID) and monitoring system; (2) develop a concept of operations for the identification and monitoring system; (3) determine cylinder monitoring devices and technology; (4) develop a registry database to support proof-of-concept demonstration; (5) integrate that system for the demonstration; and (6) demonstrate proof-of-concept. Throughout NNSA's performance of the tasks outlined in this program, the multi-laboratory team emphasizes that extensive engagement with industry stakeholders, regulatory authorities and inspectorates is essential to its success.

  11. Magnetic resonance imaging and computational fluid dynamics (CFD) simulations of rabbit nasal airflows for the development of hybrid CFD/PBPK models

    SciTech Connect (OSTI)

    Corley, Richard A.; Minard, Kevin R.; Kabilan, Senthil; Einstein, Daniel R.; Kuprat, Andrew P.; harkema, J. R.; Kimbell, Julia; Gargas, M. L.; Kinzell, John H.


    The percentages of total air?ows over the nasal respiratory and olfactory epithelium of female rabbits were cal-culated from computational ?uid dynamics (CFD) simulations of steady-state inhalation. These air?ow calcula-tions, along with nasal airway geometry determinations, are critical parameters for hybrid CFD/physiologically based pharmacokinetic models that describe the nasal dosimetry of water-soluble or reactive gases and vapors in rabbits. CFD simulations were based upon three-dimensional computational meshes derived from magnetic resonance images of three adult female New Zealand White (NZW) rabbits. In the anterior portion of the nose, the maxillary turbinates of rabbits are considerably more complex than comparable regions in rats, mice, mon-keys, or humans. This leads to a greater surface area to volume ratio in this region and thus the potential for increased extraction of water soluble or reactive gases and vapors in the anterior portion of the nose compared to many other species. Although there was considerable interanimal variability in the ?ne structures of the nasal turbinates and air?ows in the anterior portions of the nose, there was remarkable consistency between rabbits in the percentage of total inspired air?ows that reached the ethmoid turbinate region (~50%) that is presumably lined with olfactory epithelium. These latter results (air?ows reaching the ethmoid turbinate region) were higher than previous published estimates for the male F344 rat (19%) and human (7%). These di?erences in regional air?ows can have signi?cant implications in interspecies extrapolations of nasal dosimetry.

  12. Past, Present, and Future Production of Bio-oil

    SciTech Connect (OSTI)

    Steele, Philip; Yu, Fei; Gajjela, Sanjeev


    Bio-oil is a liquid product produced by fast pyrol-ysis of biomass. The fast pyrolysis is performed by heating the biomass rapidly (2 sec) at temperatures ranging from 350 to 650 oC. The vapors produced by this rapid heating are then condensed to produce a dark brown water-based emulsion composed of frag-ments of the original hemicellulose, cellulose and lignin molecules contained in the biomass. Yields range from 60 to 75% based on the feedstock type and the pyrolysis reactor employed. The bio-oil pro-duced by this process has a number of negative prop-erties that are produced mainly by the high oxygen content (40 to 50%) contributed by that contained in water (25 to 30% of total mass) and oxygenated compounds. Each bio-oil contains hundreds of chemi-cal compounds. The chemical composition of bio-oil renders it a very recalcitrant chemical compound. To date, the difficulties in utilizing bio-oil have limited its commercial development to the production of liq-uid smoke as food flavoring. Practitioners have at-tempted to utilize raw bio-oil as a fuel; they have also applied many techniques to upgrade bio-oil to a fuel. Attempts to utilize raw bio-oil as a combustion engine fuel have resulted in engine or turbine dam-age; however, Stirling engines have been shown to successfully combust raw bio-oil without damage. Utilization of raw bio-oil as a boiler fuel has met with more success and an ASTM standard has recently been released describing bio-oil characteristics in relation to assigned fuel grades. However, commercialization has been slow to follow and no reports of distribution of these bio-oil boiler fuels have been reported. Co-feeding raw bio-oil with coal has been successfully performed but no current power generation facilities are following this practice. Upgrading of bio-oils to hydrocarbons via hydroprocessing is being performed by several organizations. Currently, limited catalyst life is the obstacle to commercialization of this tech-nology. Researchers have developed means to increase the anhydrosugars content of bio-oil above the usual 3% produced during normal pyrolysis by mild acid pretreatment of the biomass feedstock. Mississippi State University has developed a proprietary method to produce an aqueous fraction containing more than 50% of anhydrosugars content. These anhydrosugars can be catalyzed to hydrogen or hydrocarbons; alter-nately, the aqueous fraction can be hydrolyzed to pro-duce a high-glucose content. The hydrolyzed product can then be filtered to remove microbial inhibitor compounds followed by production of alcohols by fer-mentation. Production of bio-oil is now considered a major candidate as a technology promising production of drop-in transportation and boiler fuels.