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Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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1

The Construction of Zonal Models of Dispersion in Channels via Matched Centre Manifolds  

E-Print Network (OSTI)

Taylor's model of dispersion simply describes the long-term spread of material along a pipe, channel or river. However, often we need multi-mode models to resolve finer details in space and time. Here we construct zonal models of dispersion via the new principle of matching their long-term evolution with that of the original problem. Using centre manifold techniques this is done straightforwardly and systematically. Furthermore, this approach provides correct initial and boundary conditions for the zonal models. We expect the proposed principle of matched centre manifold evolution to be useful in a wide range of modelling problems.

S. D. Watt; A. J. Roberts

1994-12-02T23:59:59.000Z

2

Dispersed Fluid Flow in Fractured Reservoirs- an Analysis of...  

Open Energy Info (EERE)

correlations. Downhole measurements of the tracer response exiting from discrete fracture zones permit further characterization of reservoir fluid flow behavior. Tracer...

3

On the application of computational fluid dynamics codes for liquefied natural gas dispersion.  

SciTech Connect

Computational fluid dynamics (CFD) codes are increasingly being used in the liquefied natural gas (LNG) industry to predict natural gas dispersion distances. This paper addresses several issues regarding the use of CFD for LNG dispersion such as specification of the domain, grid, boundary and initial conditions. A description of the k-{var_epsilon} model is presented, along with modifications required for atmospheric flows. Validation issues pertaining to the experimental data from the Burro, Coyote, and Falcon series of LNG dispersion experiments are also discussed. A description of the atmosphere is provided as well as discussion on the inclusion of the Coriolis force to model very large LNG spills.

Luketa-Hanlin, Anay Josephine; Koopman, Ronald P. (Lawrence Livermore National Laboratory, Livermore, CA); Ermak, Donald (Lawrence Livermore National Laboratory, Livermore, CA)

2006-02-01T23:59:59.000Z

4

Measurement of average density and relative volumes in a dispersed two-phase fluid  

DOE Patents (OSTI)

An apparatus and a method are disclosed for measuring the average density and relative volumes in an essentially transparent, dispersed two-phase fluid. A laser beam with a diameter no greater than 1% of the diameter of the bubbles, droplets, or particles of the dispersed phase is directed onto a diffraction grating. A single-order component of the diffracted beam is directed through the two-phase fluid and its refraction is measured. Preferably, the refracted beam exiting the fluid is incident upon a optical filter with linearly varing optical density and the intensity of the filtered beam is measured. The invention can be combined with other laser-based measurement systems, e.g., laser doppler anemometry.

Sreepada, Sastry R. (Clifton Park, NY); Rippel, Robert R. (late of Scotia, NY)

1992-01-01T23:59:59.000Z

5

Edge compression manifold apparatus  

DOE Patents (OSTI)

A manifold for connecting external capillaries to the inlet and/or outlet ports of a microfluidic device for high pressure applications is provided. The fluid connector for coupling at least one fluid conduit to a corresponding port of a substrate that includes: (i) a manifold comprising one or more channels extending therethrough wherein each channel is at least partially threaded, (ii) one or more threaded ferrules each defining a bore extending therethrough with each ferrule supporting a fluid conduit wherein each ferrule is threaded into a channel of the manifold, (iii) a substrate having one or more ports on its upper surface wherein the substrate is positioned below the manifold so that the one or more ports is aligned with the one or more channels of the manifold, and (iv) device to apply an axial compressive force to the substrate to couple the one or more ports of the substrate to a corresponding proximal end of a fluid conduit.

Renzi, Ronald F. (Tracy, CA)

2007-02-27T23:59:59.000Z

6

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes.

Adkins, Douglas R. (Albuquerque, NM); Rawlinson, K. Scott (Albuquerque, NM)

1994-01-01T23:59:59.000Z

7

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section is described for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes. 1 figure.

Adkins, D.R.; Rawlinson, K.S.

1994-01-04T23:59:59.000Z

8

Pollutant Dispersion in a Large Indoor Space Part 2 -- Computational Fluid  

NLE Websites -- All DOE Office Websites (Extended Search)

Pollutant Dispersion in a Large Indoor Space Part 2 -- Computational Fluid Pollutant Dispersion in a Large Indoor Space Part 2 -- Computational Fluid Dyamics (CF) Predictions and Comparisons with a Model Experiment for Isothermal Flow Title Pollutant Dispersion in a Large Indoor Space Part 2 -- Computational Fluid Dyamics (CF) Predictions and Comparisons with a Model Experiment for Isothermal Flow Publication Type Journal Article Year of Publication 2004 Authors Finlayson, Elizabeth U., Ashok J. Gadgil, Tracy L. Thatcher, and Richard G. Sextro Journal Indoor Air Volume 14 Start Page Chapter Pagination 272-283 Abstract This paper reports on an investigation of the adequacy of Computational fluid dynamics (CFD), using a standard Reynolds Averaged Navier Stokes (RANS) model, for predicting dispersion of neutrally buoyant gas in a large indoor space. We used CFD to predict pollutant (dye) concentration profiles in a water filled scale model of an atrium with a continuous pollutant source. Predictions from the RANS formulation are comparable to an ensemble average of independent identical experiments. Model results were compared to pollutant concentration data in a horizontal plane from experiments in a scale model atrium. Predictions were made for steady-state (fully developed) and transient (developing) pollutant concentrations. Agreement between CFD predictions and ensemble averaged experimental measurements is quantified using the ratios of CFD-predicted and experimentally measured dye concentration at a large number of points in the measurement plane. Agreement is considered good if these ratios fall between 0.5 and 2.0 at all points in the plane. The standard k-epsilon two equation turbulence model obtains this level of agreement and predicts pollutant arrival time to the measurement plane within a few seconds. These results suggest that this modeling approach is adequate for predicting isothermal pollutant transport in a large room with simple geometry

9

Method for electrically producing dispersions of a nonconductive fluid in a conductive medium  

DOE Patents (OSTI)

A method for use in electrically forming dispersions of a nonconducting fluid in a conductive medium that minimizes power consumption, gas generation, and sparking between the electrode of the nozzle and the conductive medium. The method utilizes a nozzle having a passageway, the wall of which serves as the nozzle electrode, for the transport of the nonconducting fluid into the conductive medium. A second passageway provides for the transport of a flowing low conductivity buffer fluid which results in a region of the low conductivity buffer fluid immediately adjacent the outlet from the first passageway to create the necessary protection from high current drain and sparking. An electrical potential difference applied between the nozzle electrode and an electrode in contact with the conductive medium causes formation of small droplets or bubbles of the nonconducting fluid within the conductive medium. A preferred embodiment has the first and second passageways arranged in a concentric configuration, with the outlet tip of the first passageway withdrawn into the second passageway.

DePaoli, David W. (Knoxville, TN); Tsouris, Constantinos (Oak Ridge, TN); Feng, James Q. (Fairport, NY)

1998-01-01T23:59:59.000Z

10

Method for electrically producing dispersions of a nonconductive fluid in a conductive medium  

DOE Patents (OSTI)

A method is described for use in electrically forming dispersions of a nonconducting fluid in a conductive medium that minimizes power consumption, gas generation, and sparking between the electrode of the nozzle and the conductive medium. The method utilizes a nozzle having a passageway, the wall of which serves as the nozzle electrode, for the transport of the nonconducting fluid into the conductive medium. A second passageway provides for the transport of a flowing low conductivity buffer fluid which results in a region of the low conductivity buffer fluid immediately adjacent the outlet from the first passageway to create the necessary protection from high current drain and sparking. An electrical potential difference applied between the nozzle electrode and an electrode in contact with the conductive medium causes formation of small droplets or bubbles of the nonconducting fluid within the conductive medium. A preferred embodiment has the first and second passageways arranged in a concentric configuration, with the outlet tip of the first passageway withdrawn into the second passageway. 4 figs.

DePaoli, D.W.; Tsouris, C.; Feng, J.Q.

1998-06-09T23:59:59.000Z

11

The dispersion of dense effluent from an inclined jet discharging into still fluid  

E-Print Network (OSTI)

. Reid This thesis considers the dispersion of a dense effLuent, such as discharged by a desalination plant, in s. still, initially homogeneous fluid. The solution - s applica'ble near the effluent source where the momen- tum of the source... on the jet axis as a function of s E 0 F J 0 centerline value of s at the orifice nozzle densimetric Froude numbe: local densimetric Froude number acceleration due to gravity momentum transport from the source turbulent exchange co ff'cient defined...

Mitchell, Thomas Mark

2012-06-07T23:59:59.000Z

12

Dispersal  

NLE Websites -- All DOE Office Websites (Extended Search)

Dispersal Dispersal Nature Bulletin No. 675-A April 15, 1978 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation SEED DISPERSAL Plants that scatter their seeds widely have a better chance to survive than those which do not. Different kinds spread their seeds in various special ways. Many seeds ride the wind. Maple seeds spin away like little helicopters with a single wing. In a strong breeze they can travel a city block. Those of the elm are small papery disks with a seed in the center. The ash seed and its wing resembles a canoe paddle. In the basswood a few seeds are suspended beneath a large flat blade that glides through the air. Ripe, dry pine cones open and release winged seeds hidden between the cone scales.

13

Modelling suspended sediment in environmental turbulent fluids  

E-Print Network (OSTI)

Modelling sediment transport in environmental turbulent fluids is a challenge. This article develops a sound model of the lateral transport of suspended sediment in environmental fluid flows such as floods and tsunamis. The model is systematically derived from a 3D turbulence model based on the Smagorinski large eddy closure. Embedding the physical dynamics into a family of problems and analysing linear dynamics of the system, centre manifold theory indicates the existence of slow manifold parametrised by macroscale variables. Computer algebra then constructs the slow manifold in terms of fluid depth, depth-averaged lateral velocities, and suspended sediment concentration. The model includes the effects of sediment erosion, advection, dispersion, and also the interactions between the sediment and turbulent fluid flow. Vertical distributions of the velocity and concentration in steady flow agree with the established experimental data. Numerical simulations of the suspended sediment under large waves show that ...

Cao, Meng

2014-01-01T23:59:59.000Z

14

Origami manifolds  

E-Print Network (OSTI)

An origami manifold is a manifold equipped with a closed 2-form which is symplectic everywhere except on a hypersurface, where it is a folded form whose kernel defines a circle fibration. In this thesis I explain how an ...

Pissarra Pires, Ana Rita

2010-01-01T23:59:59.000Z

15

Wave front dispersion due to fluid-structure interaction in long liquid-filled pipelines  

E-Print Network (OSTI)

and dispersion than the corresponding standard water-hammer calculations. The reason is that a number of effects

Eindhoven, Technische Universiteit

16

New Environmentally Friendly Dispersants for High Temperature Invert-Emulsion Drilling Fluids Weighted by Manganese Tetraoxide  

E-Print Network (OSTI)

filtration. 3. Specific fluid weight is required to hydrostatically balance formation pressures and to control the well column. The desired fluid density is attained by addition of weighting agents like barite and calcium carbonate. OBMs are water...) minimized drilling problems related to water-sensitive shales. Also, Bennett (1984) mentioned that mineral-oil based invert-emulsion fluids have greater tolerance to the contaminants such as carbonates, hydrogen sulfide, anhydrite, salt, or cement...

Rehman, Abdul

2012-02-14T23:59:59.000Z

17

Liquefied Natural Gas (LNG) Vapor Dispersion Modeling with Computational Fluid Dynamics Codes  

E-Print Network (OSTI)

Federal regulation 49 CFR 193 and standard NFPA 59A require the use of validated consequence models to determine the vapor cloud dispersion exclusion zones for accidental liquefied natural gas (LNG) releases. For modeling purposes, the physical...

Qi, Ruifeng

2012-10-19T23:59:59.000Z

18

Manifold Integration: Data Integration on Multiple Manifolds  

E-Print Network (OSTI)

In data analysis, data points are usually analyzed based on their relations to other points (e.g., distance or inner product). This kind of relation can be analyzed on the manifold of the data set. Manifold learning is an approach to understand...

Choi, Hee Youl

2011-08-08T23:59:59.000Z

19

Nozzle for electric dispersion reactor  

DOE Patents (OSTI)

A nozzle for an electric dispersion reactor includes two concentric electrodes, the inner one of the two delivering disperse phase fluid into a continuous phase fluid. A potential difference generated by a voltage source creates a dispersing electric field at the end of the inner electrode.

Sisson, Warren G. (Oak Ridge, TN); Basaran, Osman A. (Oak Ridge, TN); Harris, Michael T. (Knoxville, TN)

1998-01-01T23:59:59.000Z

20

Nozzle for electric dispersion reactor  

DOE Patents (OSTI)

A nozzle for an electric dispersion reactor includes two concentric electrodes, the inner one of the two delivering disperse phase fluid into a continuous phase fluid. A potential difference generated by a voltage source creates a dispersing electric field at the end of the inner electrode. 4 figs.

Sisson, W.G.; Basaran, O.A.; Harris, M.T.

1998-04-14T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Simulation of fluid displacement in porous media - improved methods to minimize numerical dispersion and grid orientation effects  

E-Print Network (OSTI)

in performance. Also, under these conditions, the calculated results are highly sen- sitive to grid orientation. '1 * Todd, et al. demonstrated the grid orientation effects for five-point finite difference reservoir simulators. They proposed a two... GRAPHICAL DESCRIPTION numerical dispersion and grid orientation effects. The difference in recovery performance for diagonal and parallel grids was not ap- preciable when finer grids were used, Coats, et al. simulated a five-spot steamflood...

Laprea-Bigott, Marcelo

1976-01-01T23:59:59.000Z

22

Manifold tool guide  

DOE Patents (OSTI)

A tool guide is described that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into the cross pipe for cleaning, inspection, etc. 3 figs.

Djordjevic, A.

1983-12-27T23:59:59.000Z

23

Manifold tool guide  

DOE Patents (OSTI)

A tool guide that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into to cross pipe for cleaning, inspection, etc.

Djordjevic, A.

1982-07-08T23:59:59.000Z

24

Manifold tool guide  

DOE Patents (OSTI)

A tool guide that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into to cross pipe for cleaning, inspection, etc.

Djordjevic, Aleksandar (Thousand Oaks, CA)

1983-12-27T23:59:59.000Z

25

Dispersant solutions for dispersing hydrocarbons  

DOE Patents (OSTI)

A dispersant solution includes a hydrocarbon dispersing solution derived from a bacterium from ATCC 75527, ATCC 75529, or ATCC 55638.

Tyndall, R.L.

1997-03-11T23:59:59.000Z

26

Finite element simulation of electrorheological fluids  

E-Print Network (OSTI)

Electrorheological (ER) fluids change their flow properties dramatically when an electric field is applied. These fluids are usually composed of dispersions of polarizable particles in an insulating base fluid or composed ...

Rhyou, Chanryeol, 1973-

2005-01-01T23:59:59.000Z

27

Shelling in low dimensional manifolds  

E-Print Network (OSTI)

1974) William Owen Murray IV, B. S. , Southwest Texas State University Chairman of Advisory Committee: Dr. L. B. Treybig The main objective of this thesis is to present some results concerning shelling of 3-cells contained in triangulated 3...-manifolds. These results will include some extensions of a theorem by Treybig which states that every compact 3-manifold has a triangulation in which every 3-cell, which is the union of 3-simplexes of the tri- angulation, can be shelled, Also, a...

Murray, William Owen

2012-06-07T23:59:59.000Z

28

Fluid Mechanics and Homeland Security  

E-Print Network (OSTI)

Fluid Mechanics and Homeland Security Gary S. Settles Mechanical and Nuclear Engineering Department and sampling, explosive detection, microfluidics and labs-on-a-chip, chem- ical plume dispersal in urban security combines established fluids topics like plume dispersion with others that are new

Settles, Gary S.

29

Locating an atmospheric contamination source using slow manifolds Wenbo Tang,1  

E-Print Network (OSTI)

the origin of atmospheric particle pollution from dispersed particle positions, provided that diffusion efLocating an atmospheric contamination source using slow manifolds Wenbo Tang,1 George Haller,2,a-dimensional atmospheric wind field in an urban street canyon. © 2009 American Institute of Physics. DOI: 10

Tang, Wenbo

30

Subcritical Stein manifolds are split K. Cieliebak  

E-Print Network (OSTI)

Subcritical Stein manifolds are split K. Cieliebak April 30, 2002 1 Introduction This note concerns the following little observation. Theorem 1.1. Every subcritical Stein manifold (domain) is deformation equiv domains are compact, whereas Stein manifolds are noncompact. Subcritical. It is well

Cieliebak, Kai

31

Nanoparticle enhanced ionic liquid heat transfer fluids  

DOE Patents (OSTI)

A heat transfer fluid created from nanoparticles that are dispersed into an ionic liquid is provided. Small volumes of nanoparticles are created from e.g., metals or metal oxides and/or alloys of such materials are dispersed into ionic liquids to create a heat transfer fluid. The nanoparticles can be dispersed directly into the ionic liquid during nanoparticle formation or the nanoparticles can be formed and then, in a subsequent step, dispersed into the ionic liquid using e.g., agitation.

Fox, Elise B.; Visser, Ann E.; Bridges, Nicholas J.; Gray, Joshua R.; Garcia-Diaz, Brenda L.

2014-08-12T23:59:59.000Z

32

Studying rheological behavior of nanoclay as oil well drilling fluid  

Science Journals Connector (OSTI)

Bentonite is commonly used to control the rheology and filtrate loss required for water-based drilling fluids. In this study, the effect ... modification on fluid viscosity and its dispersion in oil-wet fluids we...

M. Mohammadi; M. Kouhi; A. Sarrafi; M. Schaffie

2013-09-01T23:59:59.000Z

33

Construction of Conformally Compact Einstein Manifolds  

E-Print Network (OSTI)

We produce some explicit examples of conformally compact Einstein manifolds, whose conformal compactifications are foliated by Riemannian products of a closed Einstein manifold with the total space of a principal circle bundle over products of Kahler-Einstein manifolds. We compute the associated conformal invariants, i.e., the renormalized volume in even dimensions and the conformal anomaly in odd dimensions. As a by-product, we obtain some Riemannian products with vanishing Q-curvature.

Dezhong Chen

2009-08-11T23:59:59.000Z

34

Manifold seal for fuel cell stack assembly  

DOE Patents (OSTI)

An assembly for sealing a manifold to a stack of fuel cells includes a first resilient member for providing a first sealing barrier between the manifold and the stack. A second resilient member provides a second sealing barrier between the manifold and the stack. The first and second resilient members are retained in such a manner as to define an area therebetween adapted for retaining a sealing composition.

Schmitten, Phillip F. (N. Huntingdon, PA); Wright, Maynard K. (Bethel Park, PA)

1989-01-01T23:59:59.000Z

35

Hamilton Dynamics on Clifford Kaehler Manifolds  

E-Print Network (OSTI)

This paper presents Hamilton dynamics on Clifford Kaeler manifolds. In the end, the some results related to Clifford Kaehler dynamical systems are also discussed.

Mehmet Tekkoyun

2009-02-24T23:59:59.000Z

36

Seed Dispersal  

NLE Websites -- All DOE Office Websites (Extended Search)

Seed Dispersal Seed Dispersal Nature Bulletin No. 35 October 6, 1945 Forest Preserve District of Cook County Clayton F, Smith, President Roberts Mann, Superintendent of Conservation SEED DISPERSAL Plants have various ways of spreading their seeds. Some have "fly-away" seeds. Included are the dandelion, thistle, tumbleweed, cattail, clematis, and many trees. The cottonwood, sycamore, aspen, linden, ailanthus, maple, box elder, birch and the pines are all trees having seeds with wings or with "down", that are carried by winds. Certain aquatic plants have seeds that sink to bury themselves in.the mud beneath the water. Others have seeds that float and are distributed by the winds and currents that carry them away. Many plants "shoot" their seeds, the seed pods popping open with sufficient force to throw the seeds many feet away, Notable in this group are knotgrass, lady slippers, violets, vetches, jewel weed, witch- hazel, and Heavea, the Para rubber tree, The witch-hazel may shoot its seeds 30 or 40 feet.

37

Dispersivity as an oil reservoir rock characteristic  

SciTech Connect

The main objective of this research project is to establish dispersivity, {alpha}{sub d}, as an oil reservoir rock characteristic and to use this reservoir rock property to enhance crude oil recovery. A second objective is to compare the dispersion coefficient and the dispersivity of various reservoir rocks with other rock characteristics such as: porosity, permeability, capillary pressure, and relative permeability. The dispersivity of a rock was identified by measuring the physical mixing of two miscible fluids, one displacing the other in a porous medium. 119 refs., 27 figs., 12 tabs.

Menzie, D.E.; Dutta, S.

1989-12-01T23:59:59.000Z

38

GEODESIC INTERSECTIONS IN ARITHMETIC HYPERBOLIC 3-MANIFOLDS  

E-Print Network (OSTI)

GEODESIC INTERSECTIONS IN ARITHMETIC HYPERBOLIC 3-MANIFOLDS Kerry N. Jones Alan W. Reid Abstract. It was shown by Chinburg and Reid that there exist closed hyperbolic 3-manifolds in which all closed geodesics closed geodesics simple and disjoint. The natural conjecture arose that the Chinburg-Reid examples also

Jones, Kerry N.

39

Optimal Transportation on Sub-Riemannian Manifolds  

E-Print Network (OSTI)

Optimal Transportation on Sub-Riemannian Manifolds Ludovic Rifford Universit´e de Nice - Sophia Antipolis (Joint work with A. Figalli) Ludovic Rifford Optimal Transportation on Sub-Riemannian Manifolds #12;Outline I. Statement of our optimal transportation problem II. Sketch of proof of the Mc

Rifford, Ludovic

40

Optimal Transportation on Sub-Riemannian Manifolds  

E-Print Network (OSTI)

Optimal Transportation on Sub-Riemannian Manifolds Ludovic Rifford Universit´e de Nice - Sophia Antipolis (Joint work with A. Figalli) Ludovic Rifford Optimal Transportation on Sub-Riemannian Manifolds #12;Monge's Optimal Transportation Problem Let M be a separable metric space equipped with its Borel

Rifford, Ludovic

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Obstructions to Pin Structures on Kleinian Manifolds  

E-Print Network (OSTI)

We develop various topological notions on four-manifolds of Kleinian signature $(- - + +)$. In particular, we extend the concept of `Kleinian metric homotopy' to non-orientable manifolds. We then derive the topological obstructions to pin-Klein cobordism, for all of the pin groups. Finally, we discuss various examples and applications which arise from this work.

L. J. Alty; A. Chamblin

1995-05-03T23:59:59.000Z

42

Magnetic Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold...  

NLE Websites -- All DOE Office Websites (Extended Search)

Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold Flooding During Continuous Fuel Cell Operation. Magnetic Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold...

43

Project Development Specification for Valve Pit Manifold  

SciTech Connect

Establishes the performance, design development, and test requirements for the valve pit manifolds. The system engineering approach was used to develop this document in accordance with the guidelines laid out in the Systems Engineering Management Plan for Project W-314.

MCGREW, D.L.

2000-09-28T23:59:59.000Z

44

Dispersed Indeterminacy  

E-Print Network (OSTI)

A state of a single particle can be represented by a quantum blob in the corresponding phase space, or by a cell in its 2-D subspace. Its area is frequently stated to be no less than one half of the Plank constant, implying that such a cell is an indivisible quantum of the 2-D phase space. But this is generally not true, as is evident, for instance, from representation of some states in the basis of innately discrete observables like angular momentum. Here we consider some dispersed states involving the evanescent waves (EW) different from that in the total internal reflection. Such states are represented by a set of separated point-like cells, but with a large total indeterminacy. An idealized model has a discrete Wigner function forming an infinite periodic array of dots on the phase plane. The question about the total momentum indeterminacy in such state is discussed. We argue that the transverse momentum eigenstates corresponding to the considered EW-s cannot be singled out by any known measurement procedure, and the whole infinite set of the corresponding eigenvalues can contribute only a certain fraction to the observed momentum indeterminacy which remains finite.

Moses Fayngold

2014-02-05T23:59:59.000Z

45

Heat transfer to impacting drops and post critical heat flux dispersed flow  

E-Print Network (OSTI)

Heat transfer to drops impacting on a hot surface is examined in context of dispersions of flowing, boiling fluids. The liquid contribution to heat transfer from a hot tube to a two-phase dispersion is formulated in terms ...

Kendall, Gail E.

1978-01-01T23:59:59.000Z

46

A review of dispersion modelling and its application to the dispersion of particles: An overview of different dispersion models available  

Science Journals Connector (OSTI)

This paper provides the first review of the application of atmospheric models for particle dispersion. The different types of dispersion models available, from simple box type models to complex fluid dynamics models are outlined and the suitability of the different approaches to dispersion modelling within different environments, in regards to scale, complexity of the environment and concentration parameters is assessed. Finally, several major commercial and non-commercial particle dispersion packages are reviewed, detailing which processes are included and advantages and limitations of their use to modelling particle dispersion. The models reviewed included: Box models (AURORA, CPB and PBM), Gaussian models (CALINE4, HIWAY2, CAR-FMI, OSPM, CALPUFF, AEROPOL, AERMOD, UK-ADMS and SCREEN3), Lagrangian/Eulerian Models (GRAL, TAPM, ARIA Regional), CFD models (ARIA Local, MISKAM, MICRO-CALGRID) and models which include aerosol dynamics (GATOR, MONO32, UHMA, CIT, AERO, RPM, AEROFOR2, URM-1ATM, MADRID, CALGRID and UNI-AERO).

N.S. Holmes; L. Morawska

2006-01-01T23:59:59.000Z

47

Modulating dispersion properties of low index photonic crystal structures using microfluidics  

Science Journals Connector (OSTI)

We present a technique for manipulating the dispersive properties of low index periodic structures using microfluidic materials that fill the lattice with various fluids of different...

Sharkawy, Ahmed; Pustai, David; Shi, Shouyuan; Prather, Dennis; McBride, Sterling; Zanzucchi, Peter

2005-01-01T23:59:59.000Z

48

Hair treatment process providing dispersed colors by light diffraction  

DOE Patents (OSTI)

Hair was coated with polymer-containing fluid and then hot pressed to form a composite of hair and a polymer film imprinted with a nanopattern. Polychromatic light incident on the nanopattern is diffracted into dispersed colored light.

Lamartine, Bruce Carvell; Orler, E. Bruce; Sutton, Richard Matthew Charles; Song, Shuangqi

2013-12-17T23:59:59.000Z

49

Hair treatment process providing dispersed colors by light diffraction  

DOE Patents (OSTI)

Hair was coated with polymer-containing fluid and then hot pressed to form a composite of hair and a polymer film imprinted with a nanopattern. Polychromatic light incident on the nanopattern is diffracted into dispersed colored light.

Lamartine, Bruce Carvell; Orler, E. Bruce; Sutton, Richard Matthew Charles; Song, Shuangqi

2014-11-11T23:59:59.000Z

50

A GIS-based atmospheric dispersion model  

E-Print Network (OSTI)

pollution due to the use of agricultural pesticide is a major concern to- day, regarding both public health dispersion and to propose an useful air pollution prediction tool, using fluid mechanics equations and open un outil de prediction de la pollution de l'air . Ce travail concerne la modélisation de la dérive

Boyer, Edmond

51

Chapter 12 - Dispersants  

Science Journals Connector (OSTI)

Three dispersants were prepared to address dispersancy concerns associated with conductive nanotubes, cement, and pigment colorants used in ink jets. In the first case conductive nanotubes were dispersed in water by ultrasounding a mixture of nanotubes with polymeric pyridinium ionic salts. A cement dispersant consisting of a polyether containing polyacrylic acid successfully passed the 15 Hit Flow Rate. Finally ink jet colorants Lithol Rubin and Phthalo were dispersed in water using ethylene-propylene oxide polymers with minimum viscosity increase.

Thomas F. DeRosa

2013-01-01T23:59:59.000Z

52

Betti numbers of a class of barely G2 manifolds  

E-Print Network (OSTI)

We calculate explicitly the Betti numbers of a class of barely G2 manifolds - that is, G2 manifolds that are realised as a product of a Calabi-Yau manifold and a circle, modulo an involution. The particular class which we consider are those spaces where the Calabi-Yau manifolds are complete intersections of hypersurfaces in products of complex projective spaces and the involutions are free acting.

Sergey Grigorian

2009-09-25T23:59:59.000Z

53

SYMPLECTIC TOPOLOGY ON SUBCRITICAL MANIFOLDS PAUL BIRAN AND KAI CIELIEBAK  

E-Print Network (OSTI)

SYMPLECTIC TOPOLOGY ON SUBCRITICAL MANIFOLDS PAUL BIRAN AND KAI CIELIEBAK 1. Introduction The study of the symplectic topology of Stein manifolds leads naturally to two distinct subclasses: subcritical and critical. A Stein manifold is called subcritical if it admits a plurisubharmonic function which has only critical

Cieliebak, Kai

54

Connections on statistical manifolds of density operators by geometry of  

E-Print Network (OSTI)

of statistical manifolds, that is of manifolds whose points can be identified with density functions with respect to a certain measure µ. The classical references for the theory can be found in the books [1, 2, 4Connections on statistical manifolds of density operators by geometry of noncommutative Lp -spaces

Isola, Tommaso

55

Lattice Boltzmann method for colloidal dispersions with phase change  

Science Journals Connector (OSTI)

Colloidal dispersions are known to undergo phase transition in a number of processes. This often gives rise to formation of structures in a flowing medium. In this paper, we present a model for flow of a colloidal dispersion with phase change. Two distribution functions are used. The colloid is described as a non-ideal fluid capable of phase change, but rather than taking the dispersion medium as the second fluid, a better choice is the dispersion (water plus colloid) which can be considered as an incompressible fluid. This choice allows a standard Lattice Boltzmann (LB) model for incompressible fluids to be used in combination with for the 'free-energy' LB model for the colloid. The coupling between the two fluids is the drag force on the colloid and the dependence of the viscosity of the overall fluid on the particle volume fraction. The problems raised by characteristic times and lengths have been treated. The main application considered is the growth dynamics or domain structuration of protein dispersions during dead-end filtration on a membrane surface.

B. Piaud; M.J. Clifton; S. Blanco; R. Fournier

2008-01-01T23:59:59.000Z

56

Fluid Volumes: The Program FLUIDS  

Science Journals Connector (OSTI)

This chapter describes the program FLUIDS. The mathematical model underlying this program contains over 200 variables and describes control mechanisms of body fluid volumes and electrolytes as well as respirat...

Fredericus B. M. Min

1993-01-01T23:59:59.000Z

57

Port-Hamiltonian systems on discrete manifolds  

E-Print Network (OSTI)

This paper offers a geometric framework for modeling port-Hamiltonian systems on discrete manifolds. The simplicial Dirac structure, capturing the topological laws of the system, is defined in terms of primal and dual cochains related by the coboundary operators. This finite-dimensional Dirac structure, as discrete analogue of the canonical Stokes-Dirac structure, allows for the formulation of finite-dimensional port-Hamiltonian systems that emulate the behaviour of the open distributed-parameter systems with Hamiltonian dynamics.

Marko Seslija; Jacquelien M. A. Scherpen; Arjan van der Schaft

2012-01-27T23:59:59.000Z

58

THE GEOMETRIES OF 3-MANIFOLDS PETER SCOTT  

E-Print Network (OSTI)

that each smooth path on S2 has a length, namely its length as a path in £3 . (I shall consistently use ETHE GEOMETRIES OF 3-MANIFOLDS PETER SCOTT Page §1. The 2-dimensional geometries 405 §2. Geometric. The eight 3-dimensional geometries 441 E3 443 H3 448 S3 449 S2 x U 457 fPxM 459 SL2U 462 Nil 467 Sol 470 §5

Schleimer, Saul

59

Introduction Fluid/Jeans  

E-Print Network (OSTI)

Introduction Fluid/DMSC Fluid/Jeans Comments Fluid/Kinetic Hybrid Modeling of the Thermosphere;Introduction Fluid/DMSC Fluid/Jeans Comments Outline 1 Fluid/DMSC 2 Fluid/Jeans 3 Comments Justin Erwin Fluid/Kinetic Hybrid Modeling of the Thermosphere of Pluto #12;Introduction Fluid/DMSC Fluid/Jeans Comments Motivation

Johnson, Robert E.

60

Simultaneous Learning of Nonlinear Manifolds Based on the Bottleneck Neural Network  

Science Journals Connector (OSTI)

Manifold learning methods are important techniques for nonlinear extraction of high-dimensional data structures. These methods usually extract a global manifold for data. However, in many real-world problems, there is not only one global manifold, but ... Keywords: Deep structure, Manifold learning, Manifold separation, Multitask learning, Neural network, Virtual pattern

Seyyede Zohreh Seyyedsalehi, Seyyed Ali Seyyedsalehi

2014-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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61

Fluid inflation  

SciTech Connect

In this work we present an inflationary mechanism based on fluid dynamics. Starting with the action for a single barotropic perfect fluid, we outline the procedure to calculate the power spectrum and the bispectrum of the curvature perturbation. It is shown that a perfect barotropic fluid naturally gives rise to a non-attractor inflationary universe in which the curvature perturbation is not frozen on super-horizon scales. We show that a scale-invariant power spectrum can be obtained with the local non-Gaussianity parameter f{sub NL} = 5/2.

Chen, X. [Centre for Theoretical Cosmology, DAMTP, University of Cambridge, Cambridge CB3 0WA (United Kingdom); Firouzjahi, H. [School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Namjoo, M.H. [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Sasaki, M., E-mail: x.chen@damtp.cam.ac.uk, E-mail: firouz@ipm.ir, E-mail: mh.namjoo@ipm.ir, E-mail: misao@yukawa.kyoto-u.ac.jp [Yukawa Institute for theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

2013-09-01T23:59:59.000Z

62

Dispersion strengthened copper  

DOE Patents (OSTI)

A composition of matter is described which is comprised of copper and particles which are dispersed throughout the copper, where the particles are comprised of copper oxide and copper having a coating of copper oxide. A method for making this composition of matter is also described. This invention relates to the art of powder metallurgy and, more particularly, it relates to dispersion strengthened metals.

Sheinberg, H.; Meek, T.T.; Blake, R.D.

1990-01-09T23:59:59.000Z

63

How to project `circular' manifolds using geodesic distances?  

E-Print Network (OSTI)

How to project `circular' manifolds using geodesic distances? John Aldo Lee, Michel Verleysen,verleysen}@dice.ucl.ac.be Abstract. Recent papers have clearly shown the advantage of using the geodesic distance instead strongly crumpled manifolds have to be un- folded. Nevertheless, neither the Euclidean nor the geodesic

Verleysen, Michel

64

Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher  

E-Print Network (OSTI)

Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher School of Computing, University a manifold-valued random variable and a real-valued independent parameter. The principle is to fit a geodesic is evaluated as the sum-of-squared geodesic distances from the model to the data, and this provides

Boyer, Edmond

65

Geometric integration: numerical solution of differential equations on manifolds  

Science Journals Connector (OSTI)

...such as rigid bodies and the Solar System. Conserved quantities...long-term integration of the solar system by Wisdom & Holman...investigate the stability of the solar system, it was essential to...manifold invariant is greatly assisted when M is a homogeneous manifold...

1999-01-01T23:59:59.000Z

66

Heat Kernel for Open Manifolds Trevor H. Jones  

E-Print Network (OSTI)

Heat Kernel for Open Manifolds Trevor H. Jones 22nd July, 2010 Abstract It is known that for open manifolds with bounded geometry, the differential form heat kernel exists and is unique. Furthermore, it has been shown that the components of the differential form heat kernel are related via the exterior

Jones, Trevor H.

67

GRASSMANN MANIFOLDS OF JORDAN ALGEBRAS Abstract. We show that, in a JB-algebra, the projections form a Banach manifold  

E-Print Network (OSTI)

GRASSMANN MANIFOLDS OF JORDAN ALGEBRAS Cho-Ho Chu Abstract. We show that, in a JB symmetric space of compact type, for n N {0}. 1. Introduction The close connection between Jordan algebras is to address these issues, and indeed, we study manifolds of projections in JB-algebras using only real Jordan

68

Dispersed flow film boiling  

E-Print Network (OSTI)

Dispersed flow consists of small liquid droplets entrained in a flowing vapor. This flow regime can occur in cryogenic equipment, in steam generators, and during nuclear reactor loss of coolant accidents. A theoretical ...

Yoder, Graydon L.

1980-01-01T23:59:59.000Z

69

Dispersion strengthened copper  

DOE Patents (OSTI)

A composition of matter comprised of copper and particles which are dispersed throughout the copper, where the particles are comprised of copper oxide and copper having a coating of copper oxide, and a method for making this composition of matter.

Sheinberg, Haskell (Los Alamos, NM); Meek, Thomas T. (Knoxville, TN); Blake, Rodger D. (Santa Fe, NM)

1990-01-01T23:59:59.000Z

70

Dispersion strengthened copper  

DOE Patents (OSTI)

A composition of matter comprised of copper and particles which are dispersed throughout the copper, where the particles are comprised of copper oxide and copper having a coating of copper oxide, and a method for making this composition of matter.

Sheinberg, Haskell (Los Alamos, NM); Meek, Thomas T. (Knoxville, TN); Blake, Rodger D. (Santa Fe, NM)

1989-01-01T23:59:59.000Z

71

Smith theory and irreducible holomorphic symplectic manifolds  

E-Print Network (OSTI)

We study the cohomological properties of the fixed locus $X^G$ of an automorphism group $G$ of prime order $p$ acting on a variety $X$ whose integral cohomology is torsion-free. We obtain an precise relation between the mod $p$ cohomology of $X^G$ and natural invariants for the action of $G$ on the integral cohomology of $X$. We apply these results to irreducible holomorphic symplectic manifolds of deformation type of the Hilbert scheme of two points on a K3 surface: the main result of this paper is a formula relating the dimension of the mod $p$ cohomology of $X^G$ with the rank and the discriminant of the invariant lattice in the second cohomology space with integer coefficients of $X$.

Boissiere, Samuel; Sarti, Alessandra

2012-01-01T23:59:59.000Z

72

Flow Intermittency, Dispersion, and Correlated Continuous Time Random Walks in Porous Media  

E-Print Network (OSTI)

We study the intermittency of fluid velocities in porous media and its relation to anomalous dispersion. Lagrangian velocities measured at equidistant points along streamlines are shown to form a spatial Markov process. ...

de Anna, Pietro

73

Dispersion measurement as a method of quantifying geologic characterization and defining reservoir heterogeneity. Final report  

SciTech Connect

The main objective of this research project is to investigate dispersion as a method of quantifying geological characterization and defining reservoir heterogeneity in order to enhance crude oil recovery. The dispersion of flow of a reservoir rock (dispersion coefficient and dispersivity) was identified as one of the physical properties of a reservoir rock by measuring the mixing of two miscible fluids, one displacing the other in a porous medium. A rock was 100% saturated with a resident fluid and displaced by a miscible fluid of equal viscosity and equal density. Some specific experiments were performed with unequal densities. Produced fluid was analyzed by refractometer, nuclear reaction, electrical conductivity and X-ray scan. Several physical and flow characteristics were measured on the sand rock sample in order to establish correlations with the measured dispersion property. Absolute permeability, effective porosity, relative permeability, capillary pressure, the heterogeneity factor and electrical conductivity were used to better understand the flow system. Linear, transverse, 2-D and 3-D dispersions were measured and used to characterize the rock heterogeneity of the flow system. A new system of measuring dispersion was developed using a gas displacing gas system in a porous medium. An attempt was also made to determine the dispersion property of an actual reservoir from present day well log data on a producing well. 275 refs., 102 figs., 17 tabs.

Menzie, D.E.

1995-05-01T23:59:59.000Z

74

Piston Dispersive Shock Wave Problem M. A. Hoefer,1,* M. J. Ablowitz,2  

E-Print Network (OSTI)

Piston Dispersive Shock Wave Problem M. A. Hoefer,1,* M. J. Ablowitz,2 and P. Engels3 1 National University, Pullman, Washington 99164, USA (Received 24 October 2007; published 28 February 2008) The piston solutions are calculated for a piston (step potential) moving with uniform speed into a dispersive fluid

Hoefer, Mark

75

KISMET tungsten dispersal experiment  

SciTech Connect

Results of the KISMET tungsten dispersal experiment indicate a relatively small degree of wall-rock contamination caused by this underground explosive experiment. Designed as an add-on to the KISMET test, which was performed in the U-1a.02 drift of the LYNER facility at Nevada Test Site on 1 March 1995, this experiment involved recovery and analysis of wall-rock samples affected by the high- explosive test. The chemical, high-explosive blast drove tungsten powder, placed around the test package as a plutonium analog, into the surrounding wall- rock alluvium. Sample analyses by an analytical digital electron microscope (ADEM) show tungsten dispersed in the rock as tiny (<10 {mu}m) particles, agglomerates, and coatings on alluvial clasts. Tungsten concentrations, measured by energy dispersive spectral analysis on the ADEM, indicate penetration depths less than 0.1 m and maximum concentrations of 1.5 wt % in the alluvium.

Wohletz, K.; Kunkle, T.; Hawkins, W.

1996-12-01T23:59:59.000Z

76

Fixed points, stable manifolds, weather regimes, and their predictability  

In a simple, one-layer atmospheric model, we study the links between low-frequency variability and the models fixed points in phase space. The model dynamics is characterized by the coexistence of multiple weather regimes. To investigate the transitions from one regime to another, we focus on the identification of stable manifolds associated with fixed points. We show that these manifolds act as separatrices between regimes. We track each manifold by making use of two local predictability measures arising from the meteorological applications of nonlinear dynamics, namely, bred vectors and singular vectors. These results are then verified in the framework of ensemble forecasts issued from clouds (ensembles) of initial states. The divergence of the trajectories allows us to establish the connections between zones of low predictability, the geometry of the stable manifolds, and transitions between regimes.

Deremble, Bruno; D'Andrea, Fabio; Ghil, Michael [Univ. of California, Los Angeles, CA (United Staes). Atmospheric and Oceanic Sciences and Institute of Geophysics and Planetary Physics

2009-10-27T23:59:59.000Z

77

Modified Curvatures on Manifolds with Boundary and Applications  

Science Journals Connector (OSTI)

To study the reflecting diffusion processes on manifolds with boundary, some new curvature operators are introduced by using the Bakry-Emery curvature and the second fundamental form. As applications, the grad...

Feng-Yu Wang

2014-10-01T23:59:59.000Z

78

The Slow Manifold of a Five-Mode Model  

Science Journals Connector (OSTI)

The slow manifold of an inviscid five-mode model introduced by Lorenz is investigated. When the influence of the gravity modes on the Rossby modes is neglected, the analytical solution given by Lorenz and Krishnamurthy is generalized. When ...

John P. Boyd

1994-04-01T23:59:59.000Z

79

On the ultraviolet behaviour of quantum fields over noncommutative manifolds  

E-Print Network (OSTI)

By exploiting the relation between Fredholm modules and the Segal-Shale-Stinespring version of canonical quantization, and taking as starting point the first-quantized fields described by Connes' axioms for noncommutative spin geometries, a Hamiltonian framework for fermion quantum fields over noncommutative manifolds is introduced. We analyze the ultraviolet behaviour of second-quantized fields over noncommutative 3-tori, and discuss what behaviour should be expected on other noncommutative spin manifolds.

Varilly, J C; Varilly, Joseph C.; Gracia-Bondia, Jose M.

1999-01-01T23:59:59.000Z

80

Renormalization, unstable manifolds, and the fractal structure of mode locking  

SciTech Connect

The apparent universality of the fractal dimension of the set of quasiperiodic windings at the onset of chaos in a wide class of circle maps is described by construction of a universal one-parameter family of maps which lies along the unstable manifold of the renormalization group. The manifold generates a universal ''devil's staircase'' whose dimension agrees with direct numerical calculations. Applications to experiments are discussed.

Cvitanovic, P.; Jensen, M.H.; Kadanoff, L.P.; Procaccia, I.

1985-07-22T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Determination of dispersivities from a natural-gradient dispersion test  

E-Print Network (OSTI)

, and radioactive wastes. Contaminant hydrogeology is presently a focal point in the realm of hydrologic modeling. Generally, models are designed to represent simplified versions of reality and The style and format of this document was taken from the Journal... dispersivities, v ia a graphical approach, from a natural-gradient dispersion test in which artificial pollution was injected into an aquifer. The dispersion test was conducted by Sud icky et al. (1983) in order to characterize the dispersive properties...

Hoover, Caroline Marie

1985-01-01T23:59:59.000Z

82

Enhancing thermal conductivity of fluids with graphite nanoparticles and carbon nanotube  

DOE Patents (OSTI)

A fluid media such as oil or water, and a selected effective amount of carbon nanomaterials necessary to enhance the thermal conductivity of the fluid. One of the preferred carbon nanomaterials is a high thermal conductivity graphite, exceeding that of the neat fluid to be dispersed therein in thermal conductivity, and ground, milled, or naturally prepared with mean particle size less than 500 nm, and preferably less than 200 nm, and most preferably less than 100 nm. The graphite is dispersed in the fluid by one or more of various methods, including ultrasonication, milling, and chemical dispersion. Carbon nanotubes with graphitic structure is another preferred source of carbon nanomaterial, although other carbon nanomaterials are acceptable. To confer long term stability, the use of one or more chemical dispersants is preferred. The thermal conductivity enhancement, compared to the fluid without carbon nanomaterial, is proportional to the amount of carbon nanomaterials (carbon nanotubes and/or graphite) added.

Zhang, Zhiqiang (Lexington, KY); Lockwood, Frances E. (Georgetown, KY)

2008-03-25T23:59:59.000Z

83

3, 895923, 2006 Dispersivity behavior  

E-Print Network (OSTI)

in ground-water remediation or protection work. Dispersivity is established as one of the key uncertain

Paris-Sud XI, Université de

84

Closed manifolds with transcendental L2-Betti numbers.  

E-Print Network (OSTI)

In this paper, we show how to construct examples of closed manifolds with explicitly computed irrational, even transcendental L2 Betti numbers, defined via the universal covering. We show that every non-negative real number shows up as an L2-Betti number of some covering of a compact manifold, and that many computable real numbers appear as an L2-Betti number of a universal covering of a compact manifold (with a precise meaning of computable given below). In algebraic terms, for many given computable real numbers (in particular for many transcendental numbers) we show how to construct a finitely presented group and an element in the integral group ring such that the L2-dimension of the kernel is the given number. We follow the method pioneered by Austin in "Rational group ring elements with kernels having irrational dimension" arXiv:0909.2360) but refine it to get very explicit calculations which make the above statements possible.

Mikal Pichot (University of Tokyo (IPMU)); Thomas Schick (Georg-August-Universitt Gttingen); Andrzej Zuk (Paris 7)

85

The Conjugate Linearized Ricci Flow on Closed 3-Manifolds  

E-Print Network (OSTI)

We characterize the conjugate linearized Ricci flow and the associated backward heat kernel on closed three--manifolds of bounded geometry. We discuss their properties, and introduce the notion of Ricci flow conjugated constraint sets which characterizes a way of Ricci flow averaging metric dependent geometrical data. We also provide an integral representation of the Ricci flow metric itself and of its Ricci tensor in terms of the heat kernel of the conjugate linearized Ricci flow. These results, which readily extend to closed n-dimensional manifolds, yield for various conservation laws, monotonicity and asymptotic formulas for the Ricci flow and its linearization.

Mauro Carfora

2007-10-17T23:59:59.000Z

86

Phonon dispersion in graphene  

E-Print Network (OSTI)

Taking into account the constraints imposed by the lattice symmetry, the phonon dispersion is calculated for graphene with interactions between the first and second nearest neighbors in the framework of the Born-von Karman model. Analytical expressions are obtained for the out-of-plane (bending) modes determined only by two force constants as well as for the in-plane modes with four force constants. Values of the force constants are found in fitting to elastic constants and Raman frequencies observed in graphite.

L. A. Falkovsky

2007-02-17T23:59:59.000Z

87

Fluid Inclusion Gas Analysis  

SciTech Connect

Fluid inclusion gas analysis for wells in various geothermal areas. Analyses used in developing fluid inclusion stratigraphy for wells and defining fluids across the geothermal fields. Each sample has mass spectrum counts for 180 chemical species.

Dilley, Lorie

2013-01-01T23:59:59.000Z

88

A Family of Discriminative Manifold Learning Algorithms and Their Application to Speech Recognition  

Science Journals Connector (OSTI)

This paper presents a family of discriminative manifold learning approaches to feature space dimensionality reduction in noise robust automatic speech recognition (ASR). The specific goal of these techniques is to preserve local manifold structure in ...

Vikrant Singh Tomar; Richard C. Rose

2014-01-01T23:59:59.000Z

89

Phonon dispersion in graphene  

Science Journals Connector (OSTI)

Taking into account constraints imposed by the lattice symmetry we calculate analytically [1] the phonon dispersion for graphene with interactions between first and second neighbors. We find that the out?of?plane (bending) modes are not coupled with in?plane modes and described only with two force constants one of which is determined by the corresponding Raman frequency and another by the smallest elastic constant C44. In contrast to calculations by Saito et al we find the linear dispersion of the bending (out?of?plane) mode around the ? point with a small but finite sound velocity =1.57 km/s. The sound velocity of this mode is very sensitive to small variations of the force constants. The sound velocities of in?plane modes are = 20.3 km/s and =13.1 km/s. Because of the lack of information for graphene we compare the present theory with experiments on graphite. The low phonon frequencies in the critical points turn out less than their values in graphite since the atoms in graphene are more free to move in the out?of?plane direction in comparison with graphite. Accuracy of the comparison can be estimated using the value of the observed splitting of the ZA and ZO' modes in graphite which is around 130 1/cm. [1] L.A. Falkovsky cond?mat/0702409.

Leonid A. Falkovsky

2008-01-01T23:59:59.000Z

90

Intrinsic Mean Shift for Clustering on Stiefel and Grassmann Manifolds Hasan Ertan C etingul Rene Vidal  

E-Print Network (OSTI)

Intrinsic Mean Shift for Clustering on Stiefel and Grassmann Manifolds Hasan Ertan C¸ eting¨ul Ren

91

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces  

E-Print Network (OSTI)

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces Yong-Jin Liu1 , Kai 2-manifold surface, based on the geodesic metric. Given a triangulated 2-manifold T of n faces T, the Voronoi diagram of a set of point sites based on the geodesic metric (called below geodesic

Tang, Kai

92

A MANIFOLD THAT DOES NOT CONTAIN A COMPACT CORE Gerard A. Venema  

E-Print Network (OSTI)

A MANIFOLD THAT DOES NOT CONTAIN A COMPACT CORE Gerard A. Venema June 2, 1997 A b s t r ac t . A core of a (noncompact) manifold is a submanifold with the property that the inclusion to contain a compact core even though the manifold has the homotopy type of a finite complex. 1. Introduction

Venema, Gerard

93

VOLUMES OF HYPERBOLIC 3MANIFOLDS OF BETTI NUMBER AT LEAST 3  

E-Print Network (OSTI)

VOLUMES OF HYPERBOLIC 3­MANIFOLDS OF BETTI NUMBER AT LEAST 3 ANDREW PRZEWORSKI Abstract. We provide a new, simpler proof of the fact that the smallest volume hyperbolic 3­manifold has betti number­manifold has betti number at least 3, then its volume is at least 0.94689 and hence it is not the smallest

Przeworski, Andrew

94

White noise analysis on manifolds and the energy representation of a gauge group  

E-Print Network (OSTI)

The energy representation of a gauge group on a Riemannian manifold has been discussed by several authors. Y. Shimada has shown the irreducibility for compact Riemannian manifold, using white noise analysis. In this paper we extend its technique to noncompact Riemannian manifolds which have differential operators satisfying some conditions.

Takahiro Hasebe

2011-01-15T23:59:59.000Z

95

Generic measures for geodesic flows on nonpositively curved manifolds  

E-Print Network (OSTI)

Generic measures for geodesic flows on nonpositively curved manifolds Yves Coud`ene, Barbara the generic invariant probability measures for the geodesic flow on connected complete nonpositively curved subset of the set of all probability measures invariant by the geodesic flow. The proof of K. Sigmund

Paris-Sud XI, Université de

96

INTEGRABILITY OF GEODESIC FLOWS AND ISOSPECTRALITY OF RIEMANNIAN MANIFOLDS  

E-Print Network (OSTI)

INTEGRABILITY OF GEODESIC FLOWS AND ISOSPECTRALITY OF RIEMANNIAN MANIFOLDS DOROTHEE SCHUETH are isospectral for the Laplace operator on functions and such that M has completely integrable geodesic flow of the submanifolds of the unit tangent bundle given by two maximal continuous families of closed geodesics

Schüth, Dorothee

97

TOPOLOGICAL PROPERTIES OF ESCHENBURG SPACES AND 3-SASAKIAN MANIFOLDS  

E-Print Network (OSTI)

, AND WOLFGANG ZILLER Riemannian manifolds with positive sectional curvature have been a frequent topic of global by (a, b, c) = (2279, 1603, 384) and (2528, 939, 799) with r = 5143925. The two 3-Sasakian metrics sectional curvature, although the 3-Sasakian metric never has positive curvature. They are special cases

Ziller, Wolfgang

98

Manifold Identification in Dual Averaging for Regularized Stochastic ...  

E-Print Network (OSTI)

dimensional manifold of parameter space along which the regularizer is smooth. (When an ?1 ...... Proof To measure the cardinality of the complement of St, that is, Sc t := {1,2,...,t}\\St, ..... the median (rather than the mean) and the standard deviation. The table also ...... Statistics and its Interface, 1:137153, 2008. I. Vaisman.

2012-06-01T23:59:59.000Z

99

Data assimilation on the exponentially accurate slow manifold  

Science Journals Connector (OSTI)

...Michael K. Davey and John M. Huthnance Data assimilation on the exponentially accurate...climate system . I describe an approach to data assimilation making use of an explicit...conditions near the slow manifold, allowing data assimilation to be performed without introducing...

2013-01-01T23:59:59.000Z

100

Heat kernel on connected sums of Riemannian manifolds  

E-Print Network (OSTI)

Heat kernel on connected sums of Riemannian manifolds@math.cornell.edu May 1999 1 Introduction This note is about the heat kernel on a connected sum M of non-compact man- ifolds M1, M2, ..., Mk assuming that one knows enough about the heat kernels for each Mi

Grigor'yan, Alexander

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Device and method for measuring multi-phase fluid flow in a conduit using an elbow flow meter  

DOE Patents (OSTI)

A system for measuring fluid flow in a conduit. The system utilizes pressure transducers disposed generally in line upstream and downstream of the flow of fluid in a bend in the conduit. Data from the pressure transducers is transmitted to a microprocessor or computer. The pressure differential measured by the pressure transducers is then used to calculate the fluid flow rate in the conduit. Control signals may then be generated by the microprocessor or computer to control flow, total fluid dispersed, (in, for example, an irrigation system), area of dispersal or other desired effect based on the fluid flow in the conduit.

Ortiz, Marcos G. (Idaho Falls, ID); Boucher, Timothy J. (Helena, MT)

1997-01-01T23:59:59.000Z

102

Device and method for measuring multi-phase fluid flow in a conduit using an elbow flow meter  

DOE Patents (OSTI)

A system is described for measuring fluid flow in a conduit. The system utilizes pressure transducers disposed generally in line upstream and downstream of the flow of fluid in a bend in the conduit. Data from the pressure transducers is transmitted to a microprocessor or computer. The pressure differential measured by the pressure transducers is then used to calculate the fluid flow rate in the conduit. Control signals may then be generated by the microprocessor or computer to control flow, total fluid dispersed, (in, for example, an irrigation system), area of dispersal or other desired effect based on the fluid flow in the conduit. 2 figs.

Ortiz, M.G.; Boucher, T.J.

1997-06-24T23:59:59.000Z

103

Nano dispersion amplified waveguide structures  

Science Journals Connector (OSTI)

A highly dispersive waveguide structure is proposed tocefficiently compress and expand ultra short pulses in a package forming a sufficiently small footprint. A sub-wavelength...

Brown, J; Johnson, Eric; Moharam, M

2004-01-01T23:59:59.000Z

104

Environmental Pollution Air Pollution Dispersion Practical Air Pollution Dispersion  

E-Print Network (OSTI)

Environmental Pollution Air Pollution Dispersion 1 of 5 Practical ­ Air Pollution Dispersion in the lectures how such models can be used to explain observed concentrations of air pollutants in an area and to test `what-if' scenarios for pollution control and reduction. You will use the Gaussian Plume Model

Moncrieff, John B.

105

Fluid transport container  

DOE Patents (OSTI)

An improved fluid container for the transport, collection, and dispensing of a sample fluid that maintains the fluid integrity relative to the conditions of the location at which it is taken. More specifically, the invention is a fluid sample transport container that utilizes a fitting for both penetrating and sealing a storage container under controlled conditions. Additionally, the invention allows for the periodic withdrawal of portions of the sample fluid without contamination or intermixing from the environment surrounding the sample container. 13 figs.

DeRoos, B.G.; Downing, J.P. Jr.; Neal, M.P.

1995-11-14T23:59:59.000Z

106

Modeling volcanic ash dispersal  

ScienceCinema (OSTI)

Explosive volcanic eruptions inject into the atmosphere large amounts of volcanic material (ash, blocks and lapilli). Blocks and larger lapilli follow ballistic and non-ballistic trajectories and fall rapidly close to the volcano. In contrast, very fine ashes can remain entrapped in the atmosphere for months to years, and may affect the global climate in the case of large eruptions. Particles having sizes between these two end-members remain airborne from hours to days and can cover wide areas downwind. Such volcanic fallout entails a serious threat to aircraft safety and can create many undesirable effects to the communities located around the volcano. The assessment of volcanic fallout hazard is an important scientific, economic, and political issue, especially in densely populated areas. From a scientific point of view, considerable progress has been made during the last two decades through the use of increasingly powerful computational models and capabilities. Nowadays, models are used to quantify hazard scenarios and/or to give short-term forecasts during emergency situations. This talk will be focused on the main aspects related to modeling volcanic ash dispersal and fallout with application to the well known problem created by the Eyjafjll volcano in Iceland. Moreover, a short description of the main volcanic monitoring techniques is presented.

None

2011-10-06T23:59:59.000Z

107

Standardization of Thermo-Fluid Modeling in Modelica.Fluid  

E-Print Network (OSTI)

Thermo-Fluid Systems, Modelica 2003 Conference, Linkping,H. Tummescheit: The Modelica Fluid and Media Library forThermo-Fluid Pipe Networks, Modelica 2006 Conference, Vi-

Franke, Rudiger

2010-01-01T23:59:59.000Z

108

Mapping the surgery exact sequence for topological manifolds to analysis.  

E-Print Network (OSTI)

In this paper we prove the existence of a natural mapping from the surgery exact sequence for topological manifolds to the analytic surgery exact sequence of N. Higson and J. Roe. This generalizes the theorem of N. Higson and J. Roe, that is developed in the smooth setting, using the Lipschitz signature operator of Teleman and the methods elaborated by P. Piazza and T. Schick.

Vito Felice Zenobi

109

Finite Action Yang-Mills Solutions on the Group Manifold  

E-Print Network (OSTI)

We demonstrate that the left (and right) invariant Maurer-Cartan forms for any semi-simple Lie group enable one to construct solutions of the Yang-Mills equations on the group manifold equipped with the natural Cartan-Killing metric. For the unitary unimodular groups the Yang-Mills action integral is finite for such solutions. This is explicitly exhibited for the case of $SU(3)$.

T Dereli; J Schray; Robin W Tucker

1996-05-17T23:59:59.000Z

110

3-D turbulent particle dispersion submodel development. Quarterly progress report No. 1, 5 April--5 July 1991  

SciTech Connect

The lack of a mathematical description of the interactions of fluid turbulence with other physics-chemical processes is a major obstacle in modeling many industrial program. Turbulent two-phase flow is a phenomenon that is of significant practical importance to coal combustion as well as other disciplines. The interactions of fluid turbulence with the particulate phase has yet to be accurately and efficiently modeled for these industrial applications. On 15 May 1991 work was initiated to cover four major tasks toward the development of a computational submodel for turbulent particle dispersion that would be applicable to coal combustion simulations. Those four tasks are: 1. A critical evaluation of the 2-D Lagrangian particle dispersion submodel, 2. Development of a 3-D submodel for turbulent particle dispersion, 3. Evaluation of the 3-D submodel for turbulent particle dispersion, 4.Exploration of extensions of the Lagrangian dispersion theory to other applications including chemistry-turbulence interactions.

Smith, P.J.

1991-12-31T23:59:59.000Z

111

Analysis of noncircular fluid-filled boreholes in elastic formations using a perturbation model  

E-Print Network (OSTI)

underbalance drilling in the pres- ence of large tectonic stresses, can cause complex perturbationsAnalysis of noncircular fluid-filled boreholes in elastic formations using a perturbation model a perturbation model to obtain flexural mode dispersions of noncircular fluid-filled boreholes in homogeneous

Simsek, Ergun

112

Slow waves in fractures filled with viscous fluid Valeri Korneev1  

E-Print Network (OSTI)

Slow waves in fractures filled with viscous fluid Valeri Korneev1 ABSTRACT Stoneley guided waves in a fluid-filled fracture generally have larger amplitudes than other waves; therefore, their properties, a simple dispersion equa- tion for wave-propagation velocity is obtained. This velocity is much smaller

Korneev, Valeri A.

113

Ballistic dispersion in temperature gradient focusing  

E-Print Network (OSTI)

regime is the most familiar regime in microfluidic systems, an oft-overlooked regime is that of purely kinematic (or ballistic) dispersion. In most microfluidic systems, this dispersion regime is transient systems. Keywords: microfluidics; temperature gradient focusing; kinematic dispersion; Taylor

Santiago, Juan G.

114

Lattice Boltzmann Simulation of Two-Fluid Model Equations  

Science Journals Connector (OSTI)

Lattice Boltzmann Simulation of Two-Fluid Model Equations ... An implicit lattice Boltzmann equation to simulate the locally averaged flow behavior of disperse two-phase mixtures is presented. ... The viability of the lattice Boltzmann approach is demonstrated through illustrative examples. ...

Krishnan Sankaranarayanan; Sankaran Sundaresan

2008-07-02T23:59:59.000Z

115

Environmentally safe fluid extractor  

DOE Patents (OSTI)

An environmentally safe fluid extraction device for use in mobile laboratory and industrial settings comprising a pump, compressor, valving system, waste recovery tank, fluid tank, and a exhaust filtering system.

Sungaila, Zenon F. (Orland Park, IL)

1993-01-01T23:59:59.000Z

116

HEAT TRANSFER FLUIDS  

E-Print Network (OSTI)

The choice of heat transfer fluids has significant effects on the performance, cost, and reliability of solar thermal systems. In this chapter, we evaluate existing heat transfer fluids such as oils and molten salts based ...

Lenert, Andrej

2012-01-01T23:59:59.000Z

117

Perfect fluid space-times admitting a 3-dimensional conformal group acting on null orbits  

E-Print Network (OSTI)

Space-times admitting a 3-dimensional Lie group of conformal motions $C_3$ acting on null orbits are studied. Coordinate expressions for the metric and the conformal Killing vectors (CKV) are then provided (irrespectively of the matter content) and all possible perfect fluid solutions are found, although none of them verifies the weak and dominant energy conditions over the whole space-time manifold.

A. M. Sintes; J. Carot

2000-05-16T23:59:59.000Z

118

Fluid force transducer  

DOE Patents (OSTI)

An electrical fluid force transducer for measuring the magnitude and direction of fluid forces caused by lateral fluid flow, includes a movable sleeve which is deflectable in response to the movement of fluid, and a rod fixed to the sleeve to translate forces applied to the sleeve to strain gauges attached to the rod, the strain gauges being connected in a bridge circuit arrangement enabling generation of a signal output indicative of the magnitude and direction of the force applied to the sleeve.

Jendrzejczyk, Joseph A. (Warrenville, IL)

1982-01-01T23:59:59.000Z

119

Microscale fluid transport using optically controlled marangoni effect  

DOE Patents (OSTI)

Low energy light illumination and either a doped semiconductor surface or a surface-plasmon supporting surface are used in combination for manipulating a fluid on the surface in the absence of any applied electric fields or flow channels. Precise control of fluid flow is achieved by applying focused or tightly collimated low energy light to the surface-fluid interface. In the first embodiment, with an appropriate dopant level in the semiconductor substrate, optically excited charge carriers are made to move to the surface when illuminated. In a second embodiment, with a thin-film noble metal surface on a dispersive substrate, optically excited surface plasmons are created for fluid manipulation. This electrode-less optical control of the Marangoni effect provides re-configurable manipulations of fluid flow, thereby paving the way for reprogrammable microfluidic devices.

Thundat, Thomas G (Knoxville, TN); Passian, Ali (Knoxville, TN); Farahi, Rubye H (Oak Ridge, TN)

2011-05-10T23:59:59.000Z

120

Thermal Ordering in Mixed Nanoclay Dispersions  

Science Journals Connector (OSTI)

This chapter investigates the temperature induced orientational ordering in 1:1 Laponite-MMT dispersion. This dispersion showed thermally activated irreversible conformational phase transition from mostly isot...

Ravi Kumar Pujala

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Controlling particle dispersion in latex paints containing associative thickeners  

Science Journals Connector (OSTI)

Dispersantshigh carboxylate dispersant (polyacrylic acid), a range of dispersants with varying amounts of carboxylate (i.e ... monomer), a hydrophobic dispersant (olefin/maleic acid copo...

Edward Kostansek

2007-12-01T23:59:59.000Z

122

Milnor-Wood inequalities for manifolds locally isometric to a product of hyperbolic planes  

E-Print Network (OSTI)

This note describes sharp Milnor--Wood inequalities for the Euler number of flat oriented vector bundles over closed Riemannian manifolds locally isometric to products of hyperbolic planes. One consequence is that such manifolds do not admit an affine structure, confirming Chern--Sullivan's conjecture in this case. The manifolds under consideration are of particular interest, since in contrary to many other locally symmetric spaces they do admit flat vector bundle of the corresponding dimension. When the manifold is irreducible and of higher rank, it is shown that flat oriented vector bundles are determined completely by the sign of the Euler number.

Bucher, Michelle

2008-01-01T23:59:59.000Z

123

Induced matter: Curved N-manifolds encapsulated in Riemann-flat N+1 dimensional space  

E-Print Network (OSTI)

Liko and Wesson have recently introduced a new 5-dimensional induced matter solution of the Einstein equations, a negative curvature Robertson-Walker space embedded in a Riemann flat 5-dimensional manifold. We show that this solution is a special case of a more general theorem prescribing the structure of certain N+1-dimensional Riemann flat spaces which are all solutions of the Einstein equations. These solutions encapsulate N-dimensional curved manifolds. Such spaces are said to "induce matter" in the sub-manifolds by virtue of their geometric structure alone. We prove that the N-manifold can be any maximally symmetric space.

Harry I. Ringermacher; Lawrence R. Mead

2005-11-02T23:59:59.000Z

124

Special Killing forms on toric Sasaki-Einstein manifolds  

E-Print Network (OSTI)

In this paper we study the interplay between complex coordinates on the Calabi-Yau metric cone and the special Killing forms on the toric Sasaki-Einstein manifold. In the general case we give a procedure to locally construct the special Killing forms. In the final part we exemplify the general scheme in the case of the $5-$dimensional $Y^{p,q}$ spaces, identifying the additional special Killing 2-forms which were previously obtained by the second author of the present paper, but with a different method, in [Mod. Phys. Lett. A 27 (2012) 1250217].

Vladimir Slesar; Mihai Visinescu; Gabriel Eduard Vilcu

2014-03-05T23:59:59.000Z

125

Lattice Boltzmann method for viscoelastic fluids  

Science Journals Connector (OSTI)

A lattice Boltzmann model for viscoelastic flow simulation is proposed. Elastic effects are taken into account within the framework of a Maxwell model. To test the approach, we estimate the transverse velocity autocorrelation function for a freely evolving system, and find clear manifestations of shear at large frequencies. We then characterize boundary-driven shear waves, and the resonant enhancement of shear oscillations in a periodically driven fluid confined within a capillary. The measured shear-wave dispersion relation is compared to that obtained from the Navier-Stokes equation with a Maxwell viscoelastic term, and good agreement is obtained.

Iaroslav Ispolatov and Martin Grant

2002-05-03T23:59:59.000Z

126

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

1991-08-27T23:59:59.000Z

127

Printed circuit dispersive transmission line  

DOE Patents (OSTI)

A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other.

Ikezi, Hiroyuki (Rancho Santa Fe, CA); Lin-Liu, Yuh-Ren (San Diego, CA); DeGrassie, John S. (Encinitas, CA)

1991-01-01T23:59:59.000Z

128

Fiber optic fluid detector  

DOE Patents (OSTI)

Particular gases or liquids are detected with a fiber optic element having a cladding or coating of a material which absorbs the fluid or fluids and which exhibits a change of an optical property, such as index of refraction, light transmissiveness or fluoresence emission, for example, in response to absorption of the fluid. The fluid is sensed by directing light into the fiber optic element and detecting changes in the light, such as exit angle changes for example, that result from the changed optical property of the coating material. The fluid detector may be used for such purposes as sensing toxic or explosive gases in the atmosphere, measuring ground water contamination or monitoring fluid flows in industrial processes, among other uses. 10 figs.

Angel, S.M.

1987-02-27T23:59:59.000Z

129

Time Step Expansions and the Invariant Manifold Approach to Lattice Boltzmann  

E-Print Network (OSTI)

Time Step Expansions and the Invariant Manifold Approach to Lattice Boltzmann Models D.J. Packwood dynamics of a lattice Boltzmann system is to use a combination of different approximations and expan- sions, common to all lattice Boltzmann schemes, give rise to a slow invariant manifold. We perform a time step

Gorban, Alexander N.

130

Projective metric realizations of cone-manifolds with singularities along 2-bridge knots and links  

E-Print Network (OSTI)

Projective metric realizations of cone-manifolds with singularities along 2-bridge knots and links. In particular, for some cone-manifolds with singularities along 2-bridge knots and links we give explicit homogeneous 3-geometries, which are also referred as Thurston geometries: E3 , S3 , H3 , S2 ? R, H2 ? R, SL2(R

131

L-THEORY OF 3-MANIFOLDS WITH NON-VANISHING FIRST BETTI NUMBER  

E-Print Network (OSTI)

L-THEORY OF 3-MANIFOLDS WITH NON-VANISHING FIRST BETTI NUMBER Sayed K. Roushon Abstract;rst Betti number can be computed in terms of a generalized homology theory. A consequence compact irreducible 3-manifold M with nonempty boundary has nonzero #12;rst Betti number, it is natural

Roushon, S. K.

132

VOLUMES OF HYPERBOLIC 3-MANIFOLDS OF BETTI NUMBER AT LEAST 3  

E-Print Network (OSTI)

VOLUMES OF HYPERBOLIC 3-MANIFOLDS OF BETTI NUMBER AT LEAST 3 that the smallest volume hyperbolic 3-manifold has betti number at least 3. In the process, we improve betti number at least 3, then its volume is at least 0.94689 and hence it is not the smallest

Przeworski, Andrew

133

Hamilton-Jacobi Equations on a Manifold and Applications to Grid Generation or Re nement.  

E-Print Network (OSTI)

Hamilton-Jacobi Equations on a Manifold and Applications to Grid Generation or Re#28;nement. Ph Hamilton-Jacobi equations on a manifold, typically on the graph of some previously computed function z method. Keywords: Hamilton-Jacobi equations, viscosity solutions, level set method, adaptative meshes

134

Analytical invariant manifolds near unstable points and the structure of chaos  

E-Print Network (OSTI)

It is known that the asymptotic invariant manifolds around an unstable periodic orbit in conservative systems can be represented by convergent series (Cherry 1926, Moser 1956, 1958, Giorgilli 2001). The unstable and stable manifolds intersect at an infinity of homoclinic points, generating a complicated homoclinic tangle. In the case of simple mappings it was found (Da Silva Ritter et al. 1987) that the domain of convergence of the formal series extends to infinity along the invariant manifolds. This allows in practice to study the homoclinic tangle using only series. However in the case of Hamiltonian systems, or mappings with a finite analyticity domain,the convergence of the series along the asymptotic manifolds is also finite. Here, we provide numerical indications that the convergence does not reach any homoclinic points. We discuss in detail the convergence problem in various cases and we find the degree of approximation of the analytical invariant manifolds to the real (numerical) manifolds as i) the order of truncation of the series increases, and ii) we use higher numerical precision in computing the coefficients of the series. Then we introduce a new method of series composition, by using action-angle variables, that allows the calculation of the asymptotic manifolds up to an a arbitrarily large extent. This is the first case of an analytic development that allows the computation of the invariant manifolds and their intersections in a Hamiltonian system for an extent long enough to allow the study of homoclinic chaos by analytical means.

C. Efthymiopoulos; G. Contopoulos; M. Katsanikas

2014-04-30T23:59:59.000Z

135

Nonlinear dispersion and compact structures  

SciTech Connect

Relaxing the distinguished ordering underlying the derivation of soliton supporting equations leads to new equations endowed with nonlinear dispersion crucial for the formation and coexistence of compactons, solitons with a compact support, and conventional solitons. Vibrations of the anharmonic mass-spring chain lead to a new Boussinesq equation admitting compactons and compact breathers. The model equation [ital u][sub [ital t

Rosenau, P. (Technion, Haifa 32000 (Israel) Center For Nonlinear Studies, MS-B258 Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States))

1994-09-26T23:59:59.000Z

136

Multiple overseas dispersal in amphibians  

Science Journals Connector (OSTI)

...other islands in the western Indian Ocean have been subject to intense...amphibians, which in the western Indian Ocean region are mostly rep...further used as a new calibration point of a molecular clock. We thereby...amphibian overseas dispersal in the Indian Ocean region and the origin...

2003-01-01T23:59:59.000Z

137

5, 1196512030, 2005 Dispersion on  

E-Print Network (OSTI)

ACPD 5, 11965­12030, 2005 Dispersion on complex terrain under winter conditions J. L. Palau et al-resolution mesoscale and Lagrangian particle models J. L. Palau1 , G. P´erez-Landa1 , J. Meli´a2 , D. Segarra2 , and M November 2005 ­ Published: 22 November 2005 Correspondence to: J. L. Palau (jlp@confluencia.biz) © 2005

Paris-Sud XI, Université de

138

Method And Apparatus For Reducing Sample Dispersion In Turns And Junctions Of Micro-Channel Systems  

DOE Patents (OSTI)

What is disclosed pertains to improvement in the performance of microchannel devices by providing turns, wyes, tees, and other junctions that produce little dispersion of a sample as it traverses the turn or junction. The reduced dispersion results from contraction and expansion regions that reduce the cross-sectional area over some portion of the turn or junction. By carefully designing the geometries of these regions, sample dispersion in turns and junctions is reduced to levels comparable to the effects of ordinary diffusion. The low dispersion features are particularly suited for microfluidic devices and systems using either electromotive force, pressure, or combinations thereof as the principle of fluid transport. Such microfluidic devices and systems are useful for separation of components, sample transport, reaction, mixing, dilution or synthesis, or combinations thereof.

Griffiths, Stewart K. (Danville, CA), Nilson, Robert H. (Cardiff-by-the-Sea, CA)

2004-05-11T23:59:59.000Z

139

Thermodynamics and Fluids  

Science Journals Connector (OSTI)

... AN important section of the work of modern chemical engineers lies in the application of thermodynamics to problems of fluid systems. This volume, the fourth in the series, is ... properties of physical systems and to the transport properties of fluids. The first section on thermodynamics has been written by Dr. R. Strickland Constable of the Chemical Engineering Department at ...

J. M. COULSON

1958-09-27T23:59:59.000Z

140

MAX Fluid Dynamics facility  

NLE Websites -- All DOE Office Websites (Extended Search)

MAX Fluid Dynamics facility MAX Fluid Dynamics facility Capabilities Engineering Experimentation Reactor Safety Testing and Analysis Overview Nuclear Reactor Severe Accident Experiments MAX NSTF SNAKE Aerosol Experiments System Components Laser Applications Robots Applications Other Facilities Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr MAX Fluid Dynamics facility Providing high resolution data for development of computational tools that model fluid flow and heat transfer within complex systems such as the core of a nuclear reactor. 1 2 3 4 5 Hot and cold air jets are mixed within a glass tank while laser-based anemometers and a high-speed infrared camera characterize fluid flow and heat transfer behavior. Click on image to view larger size image.

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Advective diffusive/dispersive transport in geochemical processes  

SciTech Connect

Comprehensive understanding of chemical transport in response to fluid flow and diffusion in geologic processes requires thermodynamic and transport properties of a wide variety of aqueous species at the temperature and pressure of interest, as well as mass transfer computer codes that provide simultaneously for fluid flow, diffusion, dispersion, homogeneous chemical reactions, and mineral solubilities. As a result of research carried out with support from DOE in prior years of this grant, considerable progress has been made in developing computer codes to calculate advective-dispersive-diffusional transport at both high and low pressures and temperatures. These codes have become highly sophisticated, but their application to geochemical processes is limited by the availability of thermodynamic and transport data for the major solute species in the aqueous phase. Over the past three years, research has been directed primarily toward characterizing the thermodynamic behavior of concentrated supercritical aqueous electrolyte solutions and predicting the diffusion coefficients of organic species in oil field brines. Related research has been concerned with characterizing the growth rate of hydrothermal alteration zones and assessing the relative importance of aqueous diffusion and heterogeneous reactions at mineral surfaces in geochemical processes. 103 refs., 12 figs.

Helgeson, H.C.

1991-05-28T23:59:59.000Z

142

A new statistical dispersion model for tracer tests and contaminant spread in porous media  

SciTech Connect

Dispersion of solutes moving in permeable media is an essential control to describe fluid flow in permeable media. Dispersion can be thought of as a spreading of a solute caused by the presence of microscopic inhomogeneities. An accurate model for dispersion is needed for accurate estimation of oil recovery efficiencies and clean up costs of subsurface contaminants. Current approaches utilizing the fickian assumption fall short in describing the real physics of spreading during a solute transport process. Numerous field investigations have shown that dispersivities measured in the field are much larger than those measured in the lab for the same type of porous material. Moreover, field measured dispersivities have been shown to be scale dependent, that is, a tracer test conducted over a longer travel path will yield a larger dispersivity value than a tracer test conducted in the same geologic formation over a shorter travel path. Numerous approaches to address this problem have been developed yet none attempted to go beyond the Fickian dispersion assumption. In this study, a convective dispersivity is introduced. New model assumes that dispersion is dimensionless and mainly determined by pore size distribution. The new model results in a spread that increases linearly with time contrary to conventional model, which predicts a mixing zone length that increases with square root of time. Therefore, new model explains the field test results that indicate increasing dispersivity with distance. The model validations are in perfect agreement with experimental results, which include; Ganapathy et al.`s slug experiment on Antolini sandstone, Handy`s radioactive tracer experiment on Alhambra sandstone, and CT experiment conducted at BDM-OK/NIPER facilities on Tallant sandstone.

Ates, H.; Kasap, E. [Univ. of Tulsa, OK (United States)

1995-12-31T23:59:59.000Z

143

Fluidity of highly concentrated kaolin suspensions: Influence of particle concentration and presence of dispersant  

Science Journals Connector (OSTI)

This work discusses fluidity of highly concentrated kaolin suspensions prepared by filtration technique in the presence of a dispersant (sodium salt of polyacrylic acid). Two types of rheological tests were carried out on the kaolin aqueous suspensions at different concentrations of kaolin C (1275wt.%) and dispersant Cd (01wt.% of dispersant/wt. of solid). A classical coaxial viscosimeter was used to measure viscosity of suspension when it was fluid-like. A texture analyser was used for rheological analysis of the thicker kaolin suspensions. A solgel (percolation) transition, starting from the kaolin volume fraction ?c=0.05, was observed in the absence of a dispersant. The addition of a dispersant shifted this percolation transition to higher volume fractions. The rheological data showed that the platelet particles can align in a hydrodynamic flow. A dispersant or kaolin load suppresses the interaction forces between basal and edge faces of the kaolin particles, which bear different charges. As a result, a face-to-face arrangement arises, which is supported by the electron microscopy images. Hence, the loosely packed card-house structure, which is typical for the aqueous kaolin suspensions, undergoes a gradual conversion into an oriented structure under the load of solid particles or dispersant. A maximum of the percolation threshold was reached for a certain optimum dosage of the dispersant (Cd?0.5wt.%). The higher filtration efficiency was observed for a loosely packed card-house structure in dispersant-free suspensions at low pH. A dispersant improves fluidity and dryness of the filter cakes, however, produces an oriented face-to-face structure of particles, which causes a rise in resistance to liquid flow during filtration.

Maxim Loginov; Olivier Larue; Nikolai Lebovka; Eugne Vorobiev

2008-01-01T23:59:59.000Z

144

3D CFD ELECTROCHEMICAL AND HEAT TRANSFER MODEL OF AN INTERNALLY MANIFOLDED SOLID OXIDE ELECTROLYSIS CELL  

SciTech Connect

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis cell performance and steam electrolysis in an internally manifolded planar solid oxide electrolysis cell (SOEC) stack. This design is being evaluated at the Idaho National Laboratory for hydrogen production from nuclear power and process heat. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC user-defined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, operating potential, steam-electrode gas composition, oxygen-electrode gas composition, current density and hydrogen production over a range of stack operating conditions. Single-cell and five-cell results will be presented. Flow distribution through both models is discussed. Flow enters from the bottom, distributes through the inlet plenum, flows across the cells, gathers in the outlet plenum and flows downward making an upside-down ''U'' shaped flow pattern. Flow and concentration variations exist downstream of the inlet holes. Predicted mean outlet hydrogen and steam concentrations vary linearly with current density, as expected. Effects of variations in operating temperature, gas flow rate, oxygen-electrode and steam-electrode current density, and contact resistance from the base case are presented. Contour plots of local electrolyte temperature, current density, and Nernst potential indicate the effects of heat transfer, reaction cooling/heating, and change in local gas composition. Results are discussed for using this design in the electrolysis mode. Discussion of thermal neutral voltage, enthalpy of reaction, hydrogen production, cell thermal efficiency, cell electrical efficiency, and Gibbs free energy are discussed and reported herein.

Grant L. Hawkes; James E. O'Brien; Greg Tao

2011-11-01T23:59:59.000Z

145

Shear dispersion in dense granular flows  

E-Print Network (OSTI)

We formulate and solve a model problem of dispersion of dense granular materials in rapid shear flow down an incline. The effective dispersivity of the depth-averaged concentration of the dispersing powder is shown to vary as the P\\'eclet number squared, as in classical Taylor--Aris dispersion of molecular solutes. An extensions to generic shear profiles is presented, and possible applications to industrial and geological granular flows are noted.

Christov, Ivan C

2014-01-01T23:59:59.000Z

146

Fluid sampling tool  

DOE Patents (OSTI)

A fluid sampling tool is described for sampling fluid from a container. The tool has a fluid collecting portion which is drilled into the container wall, thereby affixing it to the wall. The tool may have a fluid extracting section which withdraws fluid collected by the fluid collecting section. The fluid collecting section has a fluted shank with an end configured to drill a hole into a container wall. The shank has a threaded portion for tapping the borehole. The shank is threadably engaged to a cylindrical housing having an inner axial passageway sealed at one end by a septum. A flexible member having a cylindrical portion and a bulbous portion is provided. The housing can be slid into an inner axial passageway in the cylindrical portion and sealed to the flexible member. The bulbous portion has an outer lip defining an opening. The housing is clamped into the chuck of a drill, the lip of the bulbous section is pressed against a container wall until the shank touches the wall, and the user operates the drill. Wall shavings (kerf) are confined in a chamber formed in the bulbous section as it folds when the shank advances inside the container. After sufficient advancement of the shank, an o-ring makes a seal with the container wall. 6 figs.

Garcia, A.R.; Johnston, R.G.; Martinez, R.K.

1999-05-25T23:59:59.000Z

147

IDENTIFYING FRACTURES AND FLUID TYPES USING FLUID INCLUSION STRATIGRAPHY |  

Open Energy Info (EERE)

IDENTIFYING FRACTURES AND FLUID TYPES USING FLUID INCLUSION STRATIGRAPHY IDENTIFYING FRACTURES AND FLUID TYPES USING FLUID INCLUSION STRATIGRAPHY Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: IDENTIFYING FRACTURES AND FLUID TYPES USING FLUID INCLUSION STRATIGRAPHY Details Activities (1) Areas (1) Regions (0) Abstract: Fluid Inclusion Stratigraphy (FIS) is a method currently being developed for use in geothermal systems to identify fractures and fluid types. This paper is the third in a series of papers on the development of FIS. Fluid inclusion gas chemistry is analyzed and plotted on well log diagrams. The working hypothesis is that select gaseous species and species ratios indicate areas of groundwater and reservoir fluid flow and reservoir seals. Previously we showed that FIS analyses identify fluid types and

148

Gravitational dispersion in a torsional wave machine  

E-Print Network (OSTI)

We demonstrate that mechanical waves traveling in a torsional, mechanical wave machine exhibit dispersion due to gravity and the discreteness of the medium. We also show that although the dispersion due to discreteness is negligible, the dispersion due to gravity can be easily measured, and can be shown to disappear in a zero-gravity environment.

Rafael de la Madrid; Alejandro Gonzalez; George Irwin

2014-09-01T23:59:59.000Z

149

Multiphase fluid characterization system  

DOE Patents (OSTI)

A measurement system and method for permitting multiple independent measurements of several physical parameters of multiphase fluids flowing through pipes are described. Multiple acoustic transducers are placed in acoustic communication with or attached to the outside surface of a section of existing spool (metal pipe), typically less than 3 feet in length, for noninvasive measurements. Sound speed, sound attenuation, fluid density, fluid flow, container wall resonance characteristics, and Doppler measurements for gas volume fraction may be measured simultaneously by the system. Temperature measurements are made using a temperature sensor for oil-cut correction.

Sinha, Dipen N.

2014-09-02T23:59:59.000Z

150

Milnor-Wood inequalities for manifolds which are locally a product of surfaces  

E-Print Network (OSTI)

The classical Milnor-Wood inequalities for the Euler number of flat oriented vector bundles over surfaces are generalized for higher dimensional closed manifolds that admit a local structure of products of planes. These include products of surfaces as well as closed Hilbert-Blumenthal modular varieties. As a consequence, the Chern Conjecture is confirmed for such manifolds. For manifolds admitting a rigid locally symmetric structure, a complete classification is given for the flat vector bundles with nonzero Euler number. Some of the main results were announced in C.R. Acad. Sci. Paris, Ser. I 346 (2008) 661-666.

Bucher, Michelle

2009-01-01T23:59:59.000Z

151

Influence of air-filled porosity of soils on air permeability and gaseous dispersion  

E-Print Network (OSTI)

transverse dispersion to be neglected. Equation (2) can then be simplified to: ac a*c ac D ? ? v at " az' az (4) Determination of the longitudinal dispersion coefficient of a soil is based on analysis of the miscible displacement of two fluids... Z ? v, t VEZ [ezfc( ) + exp( ? ) erfc( Co 2 2 (D t)" D? Z + v, t )) (6) 2 (D?t) ' where ezfc( ) = complimentary error function of the argument in parentheses. The second term is very small in comparison to the first term and may be neglected...

McCarthy, Kevin P.

2012-06-07T23:59:59.000Z

152

Method for absorbing an ion from a fluid  

DOE Patents (OSTI)

A method for absorbing an ion from a fluid by using dispersing an organic acid into an anion surfactant solution, mixing in a divalent-metal containing compound and a trivalent-metal containing compound and calcining the resulting solid layered double hydroxide product to form an absorbent material and then contacting the absorbent material with an aqueous solution of cations or anions to be absorbed.

Gao, Huizhen (Carlsbad, NM); Wang, Yifeng (Albuquerque, NM); Bryan, Charles R. (Albuquerque, NM)

2007-07-03T23:59:59.000Z

153

Fluid pumping apparatus  

DOE Patents (OSTI)

A method and apparatus suitable for coupling seismic or other downhole sensors to a borehole wall in high temperature and pressure environments. In one embodiment, one or more metal bellows mounted to a sensor module are inflated to clamp the sensor module within the borehole and couple an associated seismic sensor to a borehole wall. Once the sensing operation is complete, the bellows are deflated and the sensor module is unclamped by deflation of the metal bellows. In a further embodiment, a magnetic drive pump in a pump module is used to supply fluid pressure for inflating the metal bellows using borehole fluid or fluid from a reservoir. The pump includes a magnetic drive motor configured with a rotor assembly to be exposed to borehole fluid pressure including a rotatable armature for driving an impeller and an associated coil under control of electronics isolated from borehole pressure.

West, Phillip B. (Idaho Falls, ID)

2006-01-17T23:59:59.000Z

154

Basic fluid system trainer  

DOE Patents (OSTI)

A trainer, mounted and housed within a mobile console, is used to teach and reinforce fluid principles to students. The system trainer has two centrifugal pumps, each driven by a corresponding two-speed electric motor. The motors are controlled by motor controllers for operating the pumps to circulate the fluid stored within a supply tank through a closed system. The pumps may be connected in series or in parallel. A number of valves are also included within the system to effect different flow paths for the fluid. In addition, temperature and pressure sensing instruments are installed throughout the closed system for measuring the characteristics of the fluid, as it passes through the different valves and pumps. These measurements are indicated on a front panel mounted to the console, as a teaching aid, to allow the students to observe the characteristics of the system.

Semans, Joseph P. (Uniontown, PA); Johnson, Peter G. (Pittsburgh, PA); LeBoeuf, Jr., Robert F. (Clairton, PA); Kromka, Joseph A. (Idaho Falls, ID); Goron, Ronald H. (Connellsville, PA); Hay, George D. (Venetia, PA)

1993-01-01T23:59:59.000Z

155

GEOTHERMAL FLUID PROPENE AND PROPANE: INDICATORS OF FLUID | Open Energy  

Open Energy Info (EERE)

FLUID PROPENE AND PROPANE: INDICATORS OF FLUID FLUID PROPENE AND PROPANE: INDICATORS OF FLUID Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: GEOTHERMAL FLUID PROPENE AND PROPANE: INDICATORS OF FLUID Details Activities (1) Areas (1) Regions (0) Abstract: The use of fluid inclusion gas analysis propene/propene ratios is investigated. Ratios of these species are affected by geothermal fluid temperature and oxidations state. Our purpose is to determine if analyses of these species in fluid inclusions these species to can be used to interpret fluid type, history, or process. Analyses were performed on drill cuttings at 20ft intervals from four Coso geothermal wells. Two wells are good producers, one has cold-water entrants in the production zone, and the fourth is a non-producer. The ratios show distinct differences between

156

Variable geometry exhaust manifold turbocharging system for an 8-cylinder marine diesel engine  

Science Journals Connector (OSTI)

The variable geometry exhaust manifold (VGEM) turbocharging system can realize the switch between two charging modes by the switching valve, and it can give a good performance both at the high load operation and ...

Lei Shi; Shaoming Wang; Kangyao Deng; Yi Cui

2012-06-01T23:59:59.000Z

157

Mechanical Systems on an almost Khler model of a Finsler Manifold  

E-Print Network (OSTI)

In this study, we present a new analogue of Euler-Lagrange and Hamilton equations on an almost K\\"ahler model of a Finsler manifold. Also, we give some corollories about the related mechanical systems and equations.

Mehmet Tekkoyun; O?uzhan elik

2012-11-06T23:59:59.000Z

158

Quaternionic Bundles and Betti Numbers of Symplectic 4-Manifolds with Kodaira Dimension Zero  

E-Print Network (OSTI)

Symplectic 4-manifolds with Kodaira dimension zero can be viewed as symplectic Calabi-Yau surfaces. We are able to completely determine their Betti numbers by proving two general results on quaternionic vector bundles.

Tian-Jun Li

2006-12-07T23:59:59.000Z

159

Charting a manifold Matthew Brand, MERL (draft revised Oct 2002 to appear NIPS'02)  

E-Print Network (OSTI)

Charting a manifold Matthew Brand, MERL (draft revised Oct 2002 to appear NIPS'02) Abstract We to untie knots, unroll and untwist sheets, and visualize/compress high-dimensional biomechanical and image

Roberts, Stephen

160

"Stable Prime Decompositions of Four-Manifolds" Matthias Kreck, Wolfgang Luck  

E-Print Network (OSTI)

Mi with i = 1(Mi). Stably means that one allows additional connected sums with some copies of S2 ? S2 is oriented diffeomorphic to a connected sum n i=1Mi of oriented manifolds Mi which are prime, i.e. if Mi is diffeomorphic to Mi Mi then Mi or Mi is oriented diffeomorphic to S3 . The manifolds Mi are unique up to order

Teichner, Peter

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Effect of anatomical fine structure on the flow of cerebrospinal fluid in the spinal subarachnoid space.  

SciTech Connect

The lattice Boltzmann method is used to model oscillatory flow in the spinal subarachnoid space. The effect of obstacles such as trabeculae, nerve bundles, and ligaments on fluid velocity profiles appears to be small, when the flow is averaged over the length of a vertebra. Averaged fluid flow in complex models is little different from flow in corresponding elliptical annular cavities. However, the obstacles stir the flow locally and may be more significant in studies of tracer dispersion.

Stockman, Harlan Wheelock

2005-01-01T23:59:59.000Z

162

Fluid driven reciprocating apparatus  

DOE Patents (OSTI)

An apparatus is described comprising a pair of fluid driven pump assemblies in a back-to-back configuration to yield a bi-directional pump. Each of the pump assemblies includes a piston or diaphragm which divides a chamber therein to define a power section and a pumping section. An intake-exhaust valve is connected to each of the power sections of the pump chambers, and function to direct fluid, such as compressed air, into the power section and exhaust fluid therefrom. At least one of the pistons or diaphragms is connected by a rod assembly which is constructed to define a signal valve, whereby the intake-exhaust valve of one pump assembly is controlled by the position or location of the piston or diaphragm in the other pump assembly through the operation of the rod assembly signal valve. Each of the pumping sections of the pump assemblies are provided with intake and exhaust valves to enable filling of the pumping section with fluid and discharging fluid therefrom when a desired pressure has been reached. 13 figs.

Whitehead, J.C.

1997-04-01T23:59:59.000Z

163

Dispersion measurement as a method of quantifying geologic characterization and defining reservoir heterogeneity. Annual report, July 12, 1992--July 12, 1993  

SciTech Connect

Dispersion of fluids flowing through porous media is an important phenomenon in miscible displacement. Much of the research involving dispersion and dispersivity as a property of reservoir rock has focused on miscible liquid-liquid displacement processes. This study addresses the measurement of dispersion in a gas-gas displacement system. It will enlarge the understanding of the characteristics of dispersivity and flow systems of reservoir rocks. New experimental methods and apparatus for gas-gas dispersion were developed in this study. Twenty eight gas-gas miscible displacement measurements under different flowrates and pressures were conducted on three Berea sandstone cores of varying lengths and physical properties. A gas chromatograph was utilized and modified to measure the concentration of gas at the outlet of the cores. Nitrogen was used as the displacing gas, while helium was used as the displaced gas. The experimental results were illustrated using S-shaped effluent breakthrough curves. The effect of flowrate and pressure on gas-gas dispersion, dispersion coefficient, dispersivity, and dispersion factor were determined from these curves. Gas effective diffusion coefficients were obtained by graphical methods using the dispersion coefficients under low velocities. A new method to determine the total flowing pore volume by dispersion measurement was proposed in this study. The heterogeneity of reservoir rock can be studied by this method. An increase in displacing velocity was found to decrease the mixing or dispersion of gases in porous media under low pressure (15, 30 and 40 psig). The presumption was made that a critical velocity exists for a given displacement, below which the increase of velocity results in a decrease in dispersion, and above which an increase in dispersion occurs. An increase in pressure will decrease the mixing of gases when the displacement velocity remains constant.

Menzie, D.E.

1994-01-01T23:59:59.000Z

164

View dependent fluid dynamics  

E-Print Network (OSTI)

VIEW DEPENDENT FLUID DYNAMICS A Thesis by BRIAN ARTHUR BARRAN 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 2006 Major Subject: Visualization... Sciences VIEW DEPENDENT FLUID DYNAMICS A Thesis by BRIAN ARTHUR BARRAN 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 Approved by: Chair of Committee, Donald...

Barran, Brian Arthur

2006-08-16T23:59:59.000Z

165

Thermal Ion Dispersion | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Thermal Ion Dispersion Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Thermal Ion Dispersion Details Activities (1) Areas (1) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: Geochemical Data Analysis Parent Exploration Technique: Geochemical Data Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Thermal Ion Dispersion: Thermal Ion Dispersion (TID) is a method used by the precious-metals industry to determine the movement of hot, mineral-bearing waters through rocks, gravels, and soils. The survey involves collection of soil samples

166

PRICE LEVELS AND DISPERSION WITH ASYMMETRIC INFORMATION.  

E-Print Network (OSTI)

??In the extensive literature on price dispersions that exists to date, there is a gap in the analysis of how market structure affects prices as (more)

Bhattacharya, Tanmoy

2011-01-01T23:59:59.000Z

167

Enhanced dispersion in cylindrical packed beds  

Science Journals Connector (OSTI)

...method dispersivity geometry ground water heterogeneity hydrodynamics numerical models pollution pore water porosity remediation simulation tracers 2001 07...processes including groundwater remediation, secondary oil recovery...

2002-01-01T23:59:59.000Z

168

Dispersion compensation for attosecond electron pulses  

SciTech Connect

We propose a device to compensate for the dispersion of attosecond electron pulses. The device uses only static electric and magnetic fields and therefore does not require synchronization to the pulsed electron source. Analogous to the well-known optical dispersion compensator, an electron dispersion compensator separates paths by energy in space. Magnetic fields are used as the dispersing element, while a Wien filter is used for compensation of the electron arrival times. We analyze a device with a size of centimeters, which can be applied to ultrafast electron diffraction and microscopy, and fundamental studies.

Hansen, Peter; Baumgarten, Cory; Batelaan, Herman; Centurion, Martin [Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588 (United States)

2012-08-20T23:59:59.000Z

169

Visually simulating realistic fluid motion  

E-Print Network (OSTI)

where 0 stands for obstacle cell, S surface cell, F full cell, I inlet cell, U outlet cell and the cells not marked are empty cells . . . . . . 34 12 Area weighting interpolation scheme for determining local fluid velocity for a marker k [9] . . 35... in the fluid. It is measured as the force on the face of a unit cube, inserted into the fluid. If the pressure varies in the fluid, the fluid will move due to the acceleration generated by the pressure force. The pressure at a point is isotropic in a fluid...

Naithani, Priyanka

2012-06-07T23:59:59.000Z

170

Quantifying The Complexity Of Geodesic Paths On Curved Statistical Manifolds Through Information Geometric Entropies and Jacobi Fields  

E-Print Network (OSTI)

We characterize the complexity of geodesic paths on a curved statistical manifold M_{s} through the asymptotic computation of the information geometric complexity V_{M_{s}} and the Jacobi vector field intensity J_{M_{s}}. The manifold M_{s} is a 2l-dimensional Gaussian model reproduced by an appropriate embedding in a larger 4l-dimensional Gaussian manifold and endowed with a Fisher-Rao information metric g_{{\\mu}{\

Carlo Cafaro; Stefano Mancini

2010-11-25T23:59:59.000Z

171

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID...  

Open Energy Info (EERE)

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings:...

172

Relativistic viscoelastic fluid mechanics  

SciTech Connect

A detailed study is carried out for the relativistic theory of viscoelasticity which was recently constructed on the basis of Onsager's linear nonequilibrium thermodynamics. After rederiving the theory using a local argument with the entropy current, we show that this theory universally reduces to the standard relativistic Navier-Stokes fluid mechanics in the long time limit. Since effects of elasticity are taken into account, the dynamics at short time scales is modified from that given by the Navier-Stokes equations, so that acausal problems intrinsic to relativistic Navier-Stokes fluids are significantly remedied. We in particular show that the wave equations for the propagation of disturbance around a hydrostatic equilibrium in Minkowski space-time become symmetric hyperbolic for some range of parameters, so that the model is free of acausality problems. This observation suggests that the relativistic viscoelastic model with such parameters can be regarded as a causal completion of relativistic Navier-Stokes fluid mechanics. By adjusting parameters to various values, this theory can treat a wide variety of materials including elastic materials, Maxwell materials, Kelvin-Voigt materials, and (a nonlinearly generalized version of) simplified Israel-Stewart fluids, and thus we expect the theory to be the most universal description of single-component relativistic continuum materials. We also show that the presence of strains and the corresponding change in temperature are naturally unified through the Tolman law in a generally covariant description of continuum mechanics.

Fukuma, Masafumi; Sakatani, Yuho [Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)

2011-08-15T23:59:59.000Z

173

Metallization of fluid hydrogen  

Science Journals Connector (OSTI)

...P. Tunstall Metallization of fluid hydrogen W. J. Nellis 1 A. A. Louis 2 N...The electrical resistivity of liquid hydrogen has been measured at the high dynamic...which structural changes are paramount. hydrogen|metallization of hydrogen|liquid...

1998-01-01T23:59:59.000Z

174

Conversion model aids scale-up of mobil's fluid-bed MTG process  

Science Journals Connector (OSTI)

Mobil's fluid-bed Methanol-to-Gasoline (MTG) process was successfully scaled-up, from 0.04m diameter reactor, through 0.1m, to 0.6m diameter demonstration plant. Gas tracer responses in cold flow models were interpreted by a one-dimensional axial dispersion model, and combined with reaction kinetics to develop a conversion model.

M. Edwards; A. Avidan

1986-01-01T23:59:59.000Z

175

Magnetically stimulated fluid flow patterns  

ScienceCinema (OSTI)

Sandia National Laboratories' Jim Martin and Kyle Solis explain research on the effects of magnetic fields on fluid flows and how they stimulate vigorous flows. Fluid flow is a necessary phenomenon in everything from reactors to cooling engines in cars.

Martin, Jim; Solis, Kyle

2014-08-06T23:59:59.000Z

176

Fluid Flow Modeling in Fractures  

E-Print Network (OSTI)

In this paper we study fluid flow in fractures using numerical simulation and address the challenging issue of hydraulic property characterization in fractures. The methodology is based on Computational Fluid Dynamics, ...

Sarkar, Sudipta

2004-01-01T23:59:59.000Z

177

Viscosity of alumina nanoparticles dispersed in car engine coolant  

SciTech Connect

The present paper, describes our experimental results on the viscosity of the nanofluid prepared by dispersing alumina nanoparticles (<50 nm) in commercial car coolant. The nanofluid prepared with calculated amount of oleic acid (surfactant) was tested to be stable for more than 80 days. The viscosity of the nanofluids is measured both as a function of alumina volume fraction and temperature between 10 and 50 C. While the pure base fluid display Newtonian behavior over the measured temperature, it transforms to a non-Newtonian fluid with addition of a small amount of alumina nanoparticles. Our results show that viscosity of the nanofluid increases with increasing nanoparticle concentration and decreases with increase in temperature. Most of the frequently used classical models severely under predict the measured viscosity. Volume fraction dependence of the nanofluid viscosity, however, is predicted fairly well on the basis of a recently reported theoretical model for nanofluids that takes into account the effect of Brownian motion of nanoparticles in the nanofluid. The temperature dependence of the viscosity of engine coolant based alumina nanofluids obeys the empirical correlation of the type: log ({mu}{sub nf}) = A exp(BT), proposed earlier by Namburu et al. (author)

Kole, Madhusree; Dey, T.K. [Thermophysical Measurements Laboratory, Cryogenic Engineering Centre, Indian Institute of Technology, Kharagpur 721 302 (India)

2010-09-15T23:59:59.000Z

178

Experimental characterisation of nonlocal photon fluids  

E-Print Network (OSTI)

Quantum gases of atoms and exciton-polaritons are nowadays a well established theoretical and experimental tool for fundamental studies of quantum many-body physics and suggest promising applications to quantum computing. Given their technological complexity, it is of paramount interest to devise other systems where such quantum many-body physics can be investigated at a lesser technological expense. Here we examine a relatively well-known system of laser light propagating through thermo-optical defocusing media: based on a hydrodynamical description of light as a quantum fluid of interacting photons, we propose such systems as a valid, room temperature alternative to atomic or exciton-polariton condensates for studies of many-body physics. First, we show that by using a technique traditionally used in oceanography, it is possible to perform a direct measurement of the single-particle part of the dispersion relation of the elementary excitations on top of the photon fluid and to detect its global flow. Then, ...

Vocke, David; Marino, Francesco; Wright, Ewan M; Carusotto, Iacopo; Faccio, Daniele

2015-01-01T23:59:59.000Z

179

Oscillating fluid power generator  

SciTech Connect

A system and method for harvesting the kinetic energy of a fluid flow for power generation with a vertically oriented, aerodynamic wing structure comprising one or more airfoil elements pivotably attached to a mast. When activated by the moving fluid stream, the wing structure oscillates back and forth, generating lift first in one direction then in the opposite direction. This oscillating movement is converted to unidirectional rotational movement in order to provide motive power to an electricity generator. Unlike other oscillating devices, this device is designed to harvest the maximum aerodynamic lift forces available for a given oscillation cycle. Because the system is not subjected to the same intense forces and stresses as turbine systems, it can be constructed less expensively, reducing the cost of electricity generation. The system can be grouped in more compact clusters, be less evident in the landscape, and present reduced risk to avian species.

Morris, David C

2014-02-25T23:59:59.000Z

180

Coherent quantum dynamics in steady-state manifolds of strongly dissipative systems  

E-Print Network (OSTI)

It has been recently realized that dissipative processes can be harnessed and exploited to the end of coherent quantum control and information processing. In this spirit we consider strongly dissipative quantum systems admitting a non-trivial manifold of steady states. We show how one can enact adiabatic coherent unitary manipulations e.g., quantum logical gates, inside this steady-state manifold by adding a weak, time-rescaled, Hamiltonian term into the system's Liouvillian. The effective long-time dynamics is governed by a Fermi golden rule type Hamiltonian which results from the interplay between the weak unitary control and the fast relaxation process. The leakage outside the steady-state manifold entailed by the Hamiltonian term is suppressed by an environment-induced symmetrization of the dynamics. We present applications to quantum-computation in decoherence-free subspaces and noiseless subsystems and numerical analysis of non-adiabatic errors.

Paolo Zanardi; Lorenzo Campos Venuti

2014-04-18T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Structure and thermodynamics of platelet dispersions  

E-Print Network (OSTI)

Various properties of fluids consisting of platelike particles differ from the corresponding ones of fluids consisting of spherical particles because interactions between platelets depend on their mutual orientations. One of the main issues in this topic is to understand how structural properties of such fluids depend on factors such as the shape of the platelets, the size polydispersity, the orientational order, and the platelet number density. A statistical mechanics approach to the problem is natural and in the last few years there has been a lot of work on the study of properties of platelet fluids. In this contribution some recent theoretical developments in the field are discussed and experimental investigations are described.

L. Harnau

2008-12-08T23:59:59.000Z

182

Downhole Fluid Analyzer Development  

SciTech Connect

A novel fiber optic downhole fluid analyzer has been developed for operation in production wells. This device will allow real-time determination of the oil, gas and water fractions of fluids from different zones in a multizone or multilateral completion environment. The device uses near infrared spectroscopy and induced fluorescence measurement to unambiguously determine the oil, water and gas concentrations at all but the highest water cuts. The only downhole components of the system are the fiber optic cable and windows. All of the active components--light sources, sensors, detection electronics and software--will be located at the surface, and will be able to operate multiple downhole probes. Laboratory testing has demonstrated that the sensor can accurately determine oil, water and gas fractions with a less than 5 percent standard error. Once installed in an intelligent completion, this sensor will give the operating company timely information about the fluids arising from various zones or multilaterals in a complex completion pattern, allowing informed decisions to be made on controlling production. The research and development tasks are discussed along with a market analysis.

Bill Turner

2006-11-28T23:59:59.000Z

183

Acoustic concentration of particles in fluid flow  

SciTech Connect

An apparatus for acoustic concentration of particles in a fluid flow includes a substantially acoustically transparent membrane and a vibration generator that define a fluid flow path therebetween. The fluid flow path is in fluid communication with a fluid source and a fluid outlet and the vibration generator is disposed adjacent the fluid flow path and is capable of producing an acoustic field in the fluid flow path. The acoustic field produces at least one pressure minima in the fluid flow path at a predetermined location within the fluid flow path and forces predetermined particles in the fluid flow path to the at least one pressure minima.

Ward, Michael D. (Los Alamos, NM); Kaduchak, Gregory (Los Alamos, NM)

2010-11-23T23:59:59.000Z

184

The abstract boundary---a new approach to singularities of manifolds  

E-Print Network (OSTI)

A new scheme is proposed for dealing with the problem of singularities in General Relativity. The proposal is, however, much more general than this. It can be used to deal with manifolds of any dimension which are endowed with nothing more than an affine connection, and requires a family \\calc\\ of curves satisfying a {\\em bounded parameter property} to be specified at the outset. All affinely parametrised geodesics are usually included in this family, but different choices of family \\calc\\ will in general lead to different singularity structures. Our key notion is the {\\em abstract boundary\\/} or {\\em $a$-boundary\\/} of a manifold, which is defined for any manifold \\calm\\ and is independent of both the affine connection and the chosen family \\calc\\ of curves. The $a$-boundary is made up of equivalence classes of boundary points of \\calm\\ in all possible open embeddings. It is shown that for a pseudo-Riemannian manifold $(\\calm,g)$ with a specified family \\calc\\ of curves, the abstract boundary points can then be split up into four main categories---regular, points at infinity, unapproachable points and singularities. Precise definitions are also provided for the notions of a {\\em removable singularity} and a {\\em directional singularity}. The pseudo-Riemannian manifold will be said to be singularity-free if its abstract boundary contains no singularities. The scheme passes a number of tests required of any theory of singularities. For instance, it is shown that all compact manifolds are singularity-free, irrespective of the metric and chosen family \\calc.

Susan M. Scott; Peter Szekeres

1994-05-26T23:59:59.000Z

185

Dictionary learning on the manifold of square root densities and application to reconstruction of diffusion propagator fields  

Science Journals Connector (OSTI)

In this paper, we present a novel dictionary learning framework for data lying on the manifold of square root densities and apply it to the reconstruction of diffusion propagator (DP) fields given a multi-shell diffusion MRI data set. Unlike most of ... Keywords: DW-MRI, dictionary learning, diffusion propagator reconstruction, manifold

Jiaqi Sun; Yuchen Xie; Wenxing Ye; Jeffrey Ho; Alireza Entezari; Stephen J. Blackband; Baba C. Vemuri

2013-06-01T23:59:59.000Z

186

Manifold modeling for brain population analysis Samuel Gerber *, Tolga Tasdizen, P. Thomas Fletcher, Sarang Joshi, Ross Whitaker, and the Alzheimers  

E-Print Network (OSTI)

Manifold modeling for brain population analysis Samuel Gerber *, Tolga Tasdizen, P. Thomas Fletcher Brain MRI Manifold learning Computer aided clinical diagnosis a b s t r a c t This paper describes a method for building efficient representations of large sets of brain images. Our hypothesis

Utah, University of

187

Reversible chemisorption on highly dispersed Ru catalysts  

SciTech Connect

Hydrogen and carbon monoxide adsorptions have been studied by static gas volumetric measurement on a range of highly dispersed Y-zeolite-supported ruthenium catalysts prepared by ion exchange. At ambient temperature, the absorption isotherms indicated two distinct types of adsorption - reversible (composed of both physisorption and weak chemisorption) and irreversible (strongly chemisorbed). The catalysts were highly dispersed and had average particle diameters ranging from 0.9 to 1.6 nm. Reversible hydrogen chemisorption was found to be a function of average particle diameter and dispersion. On the other hand, reversible carbon monoxide chemisorption seemed to be mainly due to interaction with the support.

Yang, C.H.; Goodwin, J.G. Jr.

1982-11-01T23:59:59.000Z

188

Inflammation and gene expression in the rat lung after instillation of silica nanoparticles: Effect of size, dispersion medium and particle surface charge  

Science Journals Connector (OSTI)

Abstract We investigated the effects of silica particles and nanoparticles (NPs) (50nm and 200nm) with a neutral and positively charged surface when dispersed in saline, bovine serum albumin (BSA) or lung lining fluid (LLF) 24h post instillation into the lungs of rats. There was a significant increase in the recruitment of neutrophils in animals instilled with 50nm plain and aminated \\{NPs\\} compared with 200nm particles when dispersed in saline or BSA, but not when dispersed in LLF. There was no evidence of toxicity or an increase in the albumin content of the bronchoalveolar lavage fluid. Immunostaining for the transcription factor Nrf2 in BAL cells indicated that there was a significant increase in nuclear colocalisation in animals treated with plain and aminated 50nm \\{NPs\\} compared with plain and aminated 200nm particles when dispersed in saline, but no difference was observed between 50nm and 200nm aminated particles when dispersed in BSA. There was no difference in nuclear colocalisation with any of the particle types dispersed in LLF. This study suggests that low dose intratracheal exposure to silica nanoparticles can produce an acute inflammatory response and that the dispersion medium may influence the magnitude of this response.

David M. Brown; Nilesh Kanase; Birgit Gaiser; Helinor Johnston; Vicki Stone

2014-01-01T23:59:59.000Z

189

Volatiles in hydrothermal fluids- A mass spectrometric study of fluid  

Open Energy Info (EERE)

Volatiles in hydrothermal fluids- A mass spectrometric study of fluid Volatiles in hydrothermal fluids- A mass spectrometric study of fluid inclusions from active geothermal systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Volatiles in hydrothermal fluids- A mass spectrometric study of fluid inclusions from active geothermal systems Details Activities (4) Areas (4) Regions (0) Abstract: A system for analysis of inclusion gas contents based upon quadrupole mass spectrometry has been designed, assembled and tested during the first 7 months of funding. The system is currently being tested and calibrated using inclusions with known gas contents from active geothermal systems. Analyses are in progress on inclusions from the Salton Sea, Valles Caldera, Geysers, and Coso geothermal systems. Author(s): Mckibben, M. A.

190

Definition: Thermal Ion Dispersion | Open Energy Information  

Open Energy Info (EERE)

Dispersion Dispersion Jump to: navigation, search Dictionary.png Thermal Ion Dispersion Thermal Ion Dispersion (TID) is a method used by the precious-metals industry to determine the movement of hot, mineral-bearing waters through rocks, gravels, and soils. The survey involves collection of soil samples and analyses of ions by an enzyme leach process done by commercial laboratories. The method utilizes the property of elements to be dissolved, transported, or deposited depending on the temperature of the thermal waters.{{#tag:ref|[[Final Technical Report}}[1][2][3][4] Also Known As enzyme leach References ↑ Geothermal Resource Evaluation And Definitioni (Gred) Program-Phases I ↑ Ii ↑ And Iii For The Animas Valley ↑ Nm Geothermal Resource]] {{#set:Reference URI={{#explode:{{#replace:[[Final Technical Report|[|}}|

191

Dispersed Project Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Dispersed Project Wind Farm Dispersed Project Wind Farm Jump to: navigation, search Name Dispersed Project Wind Farm Facility Dispersed Project Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Developer Northern Alternative Energy Energy Purchaser Xcel Energy Location Lincoln County MN Coordinates 44.4039°, -96.2646° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.4039,"lon":-96.2646,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

192

The High Shear Rheological Properties of Dispersions  

Science Journals Connector (OSTI)

Extremely high shear rates are applied to pigment dispersions during various scale-up and manufactring processes in several industries. As reported in ... responsible for failures in coating processes. Several additives

V. Ribitsch; J. Pfragner

1995-01-01T23:59:59.000Z

193

Polariton dispersion of periodic quantum well structures  

Science Journals Connector (OSTI)

We studied the polariton dispersion relations of a periodic quantum-well structure with a period in the vicinity of half the exciton resonance wavelength, i.e., the Bragg structure. We classified polariton mod...

A. V. Mintsev; L. V. Butov; C. Ell; S. Mosor

2002-11-01T23:59:59.000Z

194

Transport and Dispersion in Complex Terrain  

Science Journals Connector (OSTI)

......recently along the mountain-plains interface near DOE's Rocky Flats Plant in Colorado. ASCOT meteorological experiments in January and February 1991 were coordinated with Rocky Flats tracer releases for airflow and dispersion model evaluations......

C.E. Elderkin; P.H. Gudiksen

1993-12-01T23:59:59.000Z

195

Energy Dispersion in African Easterly Waves  

Science Journals Connector (OSTI)

The existence of an upstream (eastward) group velocity for African easterly waves (AEWs) is shown based on single-point lag regressions using gridded reanalysis data from 1990 to 2010. The eastward energy dispersion is consistent with the ...

Michael Diaz; Anantha Aiyyer

2013-01-01T23:59:59.000Z

196

Notes 09. Fluid inertia and turbulence in fluid film bearings  

E-Print Network (OSTI)

When fluid inertia effects are important. Bulk-flow model for inertial flows. Turbulence and inertia in short length journal bearings and open end dampers....

San Andres, Luis

2009-01-01T23:59:59.000Z

197

Thermodynamic Model for Fluid-Fluid Interfacial Areas in Porous...  

NLE Websites -- All DOE Office Websites (Extended Search)

areas are important in controlling the rate of mass and energy transfer between fluid phases in porous media. We present a modified thermodynamically based model (TBM) to...

198

Invariant Manifolds for the Station Keeping of Solar Sails Ariadna Farres, AJ  

E-Print Network (OSTI)

Invariant Manifolds for the Station Keeping of Solar Sails Ariadna Farr´es, AJ Universitat de 2 / 45 inria-00585612,version1-14Apr2011 #12;Background What is a Solar Sail ? Solar Sails are a new concept of spacecraft propulsion that takes ad- vantage of the Solar radiation pressure to propel

Boyer, Edmond

199

SHORT GEODESIC SEGMENTS BETWEEN TWO POINTS ON A CLOSED RIEMANNIAN MANIFOLD  

E-Print Network (OSTI)

SHORT GEODESIC SEGMENTS BETWEEN TWO POINTS ON A CLOSED RIEMANNIAN MANIFOLD Alexander Nabutovsky there exist at least k distinct geodesics of length at most 20k!d between these points for every positive that for any pair of points on a closed Riemannian man- ifold Mn there exist infinitely many geodesics

Nabutovsky, Alexander

200

Multi-robot Coverage and Exploration on Riemannian Manifolds with Boundary  

E-Print Network (OSTI)

Multi-robot Coverage and Exploration on Riemannian Manifolds with Boundary Subhrajit Bhattacharya Robert Ghrist Vijay Kumar Abstract Multi-robot coverage and exploration are fundamental problems in robotics. A widely-used, efficient and distributable algorithm for achieving coverage of a convex

Ghrist, Robert W.

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Integral manifolding structure for fuel cell core having parallel gas flow  

DOE Patents (OSTI)

Disclosed herein are manifolding means for directing the fuel and oxidant gases to parallel flow passageways in a fuel cell core. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte and interconnect wall consists respectively of anode and cathode materials layered on the opposite sides of electrolyte material, or on the opposite sides of interconnect material. A core wall projects beyond the open ends of the defined core passageways and is disposed approximately midway between and parallel to the adjacent overlaying and underlying interconnect walls to define manifold chambers therebetween on opposite sides of the wall. Each electrolyte wall defining the flow passageways is shaped to blend into and be connected to this wall in order to redirect the corresponding fuel and oxidant passageways to the respective manifold chambers either above or below this intermediate wall. Inlet and outlet connections are made to these separate manifold chambers respectively, for carrying the fuel and oxidant gases to the core, and for carrying their reaction products away from the core.

Herceg, Joseph E. (Naperville, IL)

1984-01-01T23:59:59.000Z

202

Integral manifolding structure for fuel cell core having parallel gas flow  

DOE Patents (OSTI)

Disclosed herein are manifolding means for directing the fuel and oxidant gases to parallel flow passageways in a fuel cell core. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte and interconnect wall consists respectively of anode and cathode materials layered on the opposite sides of electrolyte material, or on the opposite sides of interconnect material. A core wall projects beyond the open ends of the defined core passageways and is disposed approximately midway between and parallel to the adjacent overlaying and underlying interconnect walls to define manifold chambers therebetween on opposite sides of the wall. Each electrolyte wall defining the flow passageways is shaped to blend into and be connected to this wall in order to redirect the corresponding fuel and oxidant passageways to the respective manifold chambers either above or below this intermediate wall. Inlet and outlet connections are made to these separate manifold chambers respectively, for carrying the fuel and oxidant gases to the core, and for carrying their reaction products away from the core.

Herceg, J.E.

1983-10-12T23:59:59.000Z

203

"Stable Prime Decompositions of Four-Manifolds" Matthias Kreck, Wolfgang Luck  

E-Print Network (OSTI)

Mi with i = 1(Mi). Stably means that one allows additional connected sums with some copies of S2 ? S2 de- composition. Namely, M is oriented diffeomorphic to a connected sum n i=1Mi of oriented manifolds Mi which are prime, i.e. if Mi is diffeomorphic to Mi Mi , then Mi or Mi is oriented diffeomorphic

Lück, Wolfgang

204

Motion Tasks and Force Control for Robot Manipulators on Embedded 2-D Manifolds  

E-Print Network (OSTI)

a challenging problem of the robotics field with many appli- cations including robotic surface painting, surfaceMotion Tasks and Force Control for Robot Manipulators on Embedded 2-D Manifolds Xanthi Papageorgiou the end effector of a robotic manipulator across the surface of an object in the workspace

Loizou, Savvas G.

205

Motion Tasks for Robot Manipulators on Embedded 2-D Manifolds under Input Constraints  

E-Print Network (OSTI)

a task along a particular surface, such as robotic surface painting, surface cleaning, and surfaceMotion Tasks for Robot Manipulators on Embedded 2-D Manifolds under Input Constraints Xanthi the end effector of a robotic manipulator, which is constrained in terms of joint rates, on the surface

Tanner, Herbert G.

206

Manifold-based starting point generation and its application to distillation  

E-Print Network (OSTI)

Manifold-based starting point generation and its application to distillation Ali Baharev*, Ferenc-states in homogeneous azeotropic distillation . . . . . . . . . . 11 5.2 Multiple steady-states in ideal two-product distillation . . . . . . . . . . . . . . 11 6 Conclusion 13 A Ordering sparse matrices 14 A.1 Ordering to block

Neumaier, Arnold

207

Symmetry operators for Dirac's equation on two-dimensional spin manifolds  

E-Print Network (OSTI)

It is shown that the second order symmetry operators for the Dirac equation on a general two-dimensional spin manifold may be expressed in terms of Killing vectors and valence two Killing tensors. The role of these operators in the theory of separation of variables for the Dirac equation is studied.

Lorenzo Fatibene; Raymond G. McLenaghan; Giovanni Rastelli; Shane N. Smith

2008-12-11T23:59:59.000Z

208

A NOTE ON THE GROWTH OF BETTI NUMBERS AND RANKS OF 3-MANIFOLD GROUPS  

E-Print Network (OSTI)

A NOTE ON THE GROWTH OF BETTI NUMBERS AND RANKS OF 3-MANIFOLD GROUPS STEFAN FRIEDL Abstract. Let N with `fast' growth of Betti numbers as well as a cofinal filtration of 1(N) with `slow' growth of ranks. 1 it is of interest to study how the following measures of `complexity' grow: (1) the first Betti number b1(i) = dim H

Friedl, Stefan

209

ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING  

E-Print Network (OSTI)

ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING in turbocharged gasoline engines with variable valve timing requires knowledge of exhaust mani- fold pressure, Pe control systems for gasoline engines rely heavily on feedforward air-fuel ratio (A/F) control to meet

Grizzle, Jessy W.

210

A landscape of non-supersymmetric AdS vacua on coset manifolds  

E-Print Network (OSTI)

We construct new families of non-supersymmetric sourceless type IIA AdS4 vacua on those coset manifolds that also admit supersymmetric solutions. We investigate the spectrum of left-invariant modes and find that most, but not all, of the vacua are stable under these fluctuations. Generically, there are also no massless moduli.

Paul Koerber; Simon Kors

2010-05-10T23:59:59.000Z

211

HEAT KERNEL ON A NON-COMPACT RIEMANNIAN MANIFOLD Alexander Grigor'yan  

E-Print Network (OSTI)

HEAT KERNEL ON A NON-COMPACT RIEMANNIAN MANIFOLD Alexander Grigor'yan Dedicated to E.M.Landis 0. Introduction This paper is a survey of some recent results on the heat kernel of a non-compact complete of properties of the heat kernel in different contexts. In the present paper, we are mainly concerned with a new

Grigor'yan, Alexander

212

Role of polymeric dispersant functional groups in the dispersion behaviour of titania pigment particles  

Science Journals Connector (OSTI)

The adsorption of polymeric dispersants onto titania pigment particles has been investigated ... the type of polymer functional group, using polyacrylic acid and modified polyacrylamides. The polyacrylamides incl...

S. Farrokhpay; G. Morris; D. Fornasiero; P. Self

2004-01-01T23:59:59.000Z

213

Dispersion Tolerance Enhancement in Electronic Dispersion Compensation Using Full Optical-Field Reconstruction  

Science Journals Connector (OSTI)

We experimentally verify the feasibility of receiver-side electronic dispersion compensation using optical-field reconstruction, and theoretically increase the fundamental limit of...

Zhao, Jian; McCarthy, Mary E; Gunning, Paul; Ellis, Andrew D

214

The influence of fluid sensitive dispersion and attenuation on AVO analysis  

Science Journals Connector (OSTI)

......Technology, Hydro, Kerr McGee, Landmark, Marathon, PDVSA, Schlumberger, Shell, Total...distinguishing gas and condensate from oil and water, Geophysics, 60, 447-458...Ryjkov V.I.,2004. Direct detection of oil and gas fields based on seismic inelasticity......

Mark Chapman; Enru Liu; Xiang-Yang Li

2006-10-01T23:59:59.000Z

215

Compact acoustic travelling waves in a class of fluids with nonlinear material dispersion  

Science Journals Connector (OSTI)

...the closer beta(1) is to unity, the greater the peak value (g(0)) and maximum...gases composed of molecules possessing a great many degrees of freedom; see 2.5 of...we observe that is not a member of the class K(m,n)-(Rosenau Hyman 1993; Rosenau...

2012-01-01T23:59:59.000Z

216

Dispersion of biased swimming micro-organisms in a fluid flowing through a tube  

Science Journals Connector (OSTI)

...Additionally, phototrophic algae are often phototactic (they swim...some relevance to photosynthetic algae (a Cheese-plant effect...in using micro-organisms for fuel production. For green algae, there are two main approaches...

2010-01-01T23:59:59.000Z

217

Magnetophoretic focusing on submicron particles dispersed in a polymer-stabilized magnetic fluid  

E-Print Network (OSTI)

Magnetophoresis is the migration of particles upon the application of an inhomogeneous magnetic field. The overall goal of this work was to investigate the magnetophoretic focusing of non-magnetic particles suspended in ...

Fateen, Seif-Eddeen K. (Seif-Eddeen Khaled), 1971-

2002-01-01T23:59:59.000Z

218

The influence of fluid sensitive dispersion and attenuation on AVO analysis  

Science Journals Connector (OSTI)

......discussion. When we consider only grain scale processes the transition frequency is generally above...layer versus frequency, 68th Ann. Int. Mtg. Soc. Expl. Geophys., 976-979...gas sand reflection, 74th Ann. Int. Mtg: Soc. of Expl. Geophys., 1563-1566......

Mark Chapman; Enru Liu; Xiang-Yang Li

2006-10-01T23:59:59.000Z

219

Hydrodynamics of chains in ferrofluid-based magnetorheological fluids under rotating magnetic field  

Science Journals Connector (OSTI)

Ferrofluid-based magnetorheological (MR) fluid is prepared by dispersing micron-size magnetic spheres in a ferrofluid. We report here the mechanism of chain formation in ferrofluid based MR fluid, which is quite different from conventional MR fluid. Some of the nanomagnetic particles of ferrofluid filled inside the microcavities are formed due to association of large particles, and some of them are attached at the end of large particles. Under rotating magnetic field, fragmentation of a single chain into three parts is observed. Two of them are chains of micron-size magnetic particles which are suspended in a ferrofluid, and the third one is the chain of nanomagnetic particles of ferrofluid, which may be the connecting bridge between the two chains of larger magnetic particles. The rupture of a single chain provides evidence for the presence of nanomagnetic particles within the magnetic field-induced chainlike structure in this bidispersed MR fluid.

Rajesh Patel and Bhupendra Chudasama

2009-07-07T23:59:59.000Z

220

Dispersive shallow water magnetohydrodynamics Paul J. Dellar  

E-Print Network (OSTI)

with density h and equation of state p = 1 2 gh2 , the SWMHD equations differ from the barotropic fluid MHD propagating from midlatitudes towards the solar equator, as suggested by the "butterfly diagram" of observed

Dellar, Paul J.

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Fracturing Fluid Characterization Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Documentation Page Documentation Page 1. Report No. DE - FC 21 - 92MC29077 2. 3. Recipient's Accession No. 5. Report Date August 31, 2000 4. Title and Subtitle Fracturing Fluid Characterization Facility 6. 7. Author(s) The University of Oklahoma 8. Performing Organization Rept. No. 10. Project/Task/Work Unit No. 9. Performing Organization Name and Address The University of Oklahoma Sarkeys Energy Center T301 100 E Boyd St Norman, OK 73019 11. Contract (C) or Grant (G) No. DOE:DE FC21 92 MC29077 13. Type of Report & Period Covered Final Report 09 30 92 - 03 31 00 12. Sponsoring Organization Name and Address US Dept of Energy - FETL 3610 Collins Ferry Road Morgantown, WV 26505 14. 15. Supplementary Notes Several technical papers were prepared and presented at various Society of Petroleum Engineers Conferences and US

222

Quantifying seed dispersal kernels from truncated seed-tracking data  

E-Print Network (OSTI)

have lower survival than those that disperse further away from conspecifics (Janzen 1970; Comita et al

Bermingham, Eldredge

223

Viscosity of Quantum Hall Fluids  

Science Journals Connector (OSTI)

The viscosity of quantum fluids with an energy gap at zero temperature is related to the adiabatic curvature on the space parametrizing flat background metrics. For quantum Hall fluids on two-dimensional tori, the quantum viscosity is computed. It turns out to be isotropic, constant, and proportional to the magnetic field strength.

J. E. Avron; R. Seiler; P. G. Zograf

1995-07-24T23:59:59.000Z

224

LECTURES IN ELEMENTARY FLUID DYNAMICS  

E-Print Network (OSTI)

LECTURES IN ELEMENTARY FLUID DYNAMICS: Physics, Mathematics and Applications J. M. McDonough Departments of Mechanical Engineering and Mathematics University of Kentucky, Lexington, KY 40506-0503 c 1987, 1990, 2002, 2004, 2009 #12;Contents 1 Introduction 1 1.1 Importance of Fluids

McDonough, James M.

225

Effective perfect fluids in cosmology  

SciTech Connect

We describe the cosmological dynamics of perfect fluids within the framework of effective field theories. The effective action is a derivative expansion whose terms are selected by the symmetry requirements on the relevant long-distance degrees of freedom, which are identified with comoving coordinates. The perfect fluid is defined by requiring invariance of the action under internal volume-preserving diffeomorphisms and general covariance. At lowest order in derivatives, the dynamics is encoded in a single function of the entropy density that characterizes the properties of the fluid, such as the equation of state and the speed of sound. This framework allows a neat simultaneous description of fluid and metric perturbations. Longitudinal fluid perturbations are closely related to the adiabatic modes, while the transverse modes mix with vector metric perturbations as a consequence of vorticity conservation. This formalism features a large flexibility which can be of practical use for higher order perturbation theory and cosmological parameter estimation.

Ballesteros, Guillermo [Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Piazza del Viminale 1, I-00184 Rome (Italy); Bellazzini, Brando, E-mail: guillermo.ballesteros@unige.ch, E-mail: brando.bellazzini@pd.infn.it [Dipartimento di Fisica, Universit di Padova and INFN, Sezione di Padova, Via Marzolo 8, I-35131 Padova (Italy)

2013-04-01T23:59:59.000Z

226

Instability of nonlinear dispersive solitary waves  

Science Journals Connector (OSTI)

We consider linear instability of solitary waves of several classes of dispersive long wave models. They include generalizations of KDV, BBM, regularized Boussinesq equations, with general dispersive operators and nonlinear terms. We obtain criteria for the existence of exponentially growing solutions to the linearized problem. The novelty is that we dealt with models with nonlocal dispersive terms, for which the spectra problem is out of reach by the Evans function technique. For the proof, we reduce the linearized problem to study a family of nonlocal operators, which are closely related to properties of solitary waves. A continuation argument with a moving kernel formula is used to find the instability criteria. These techniques have also been extended to study instability of periodic waves and of the full water wave problem.

Zhiwu Lin

2008-01-01T23:59:59.000Z

227

Instability of nonlinear dispersive solitary waves  

E-Print Network (OSTI)

We consider linear instability of solitary waves of several classes of dispersive long wave models. They include generalizations of KDV, BBM, regularized Boussinesq equations, with general dispersive operators and nonlinear terms. We obtain criteria for the existence of exponentially growing solutions to the linearized problem. The novelty is that we dealt with models with nonlocal dispersive terms, for which the spectra problem is out of reach by the Evans function technique. For the proof, we reduce the linearized problem to study a family of nonlocal operators, which are closely related to properties of solitary waves. A continuation argument with a moving kernel formula are used to find the instability criteria. Recently, these techniques have also been extended to study instability of periodic waves and to the full water wave problem.

Lin, Zhiwu

2008-01-01T23:59:59.000Z

228

Ceramics containing dispersants for improved fracture toughness  

DOE Patents (OSTI)

The invention is a ceramic composition containing a new class of dispersant for hindering crack propagation by means of one or more energy-dissipative mechanisms. The composition is composed of a ceramic matrix with dispersed particles of a transformation-prone rare-earth niobate, tantalate or mixtures of these with each other and/or with a rare-earth vanadate. The dispersants, having a generic composition tRMO.sub.4, where R is a rare-earth element, B is Nb or Ta and O is oxygen, are mixed in powder form with a powder of the matrix ceramic and sintered to produce a ceramic form or body. The crack-hindering mechanisms operates to provide improved performance over a wide range of temperature and operating conditions.

Nevitt, Michael V. (Wheaton, IL); Aldred, Anthony T. (Wheaton, IL); Chan, Sai-Kit (Darien, IL)

1987-01-01T23:59:59.000Z

229

Graduate Studies Environmental Fluid Mechanics  

E-Print Network (OSTI)

and bridge scour · Wastewater dispersion in coastal waters · Cohesive sediment resuspension · Flood flume, a 24-m long tilting flume, a recirculating flume for cohesive sediment resuspension, a recircu

Jacobs, Laurence J.

230

Casimir energy, dispersion, and the Lifshitz formula  

SciTech Connect

Despite suggestions to the contrary, we show in this paper that the usual dispersive form of the electromagnetic energy density must be used to derive the Lifshitz force between parallel dielectric media. This conclusion follows from the general form of the quantum vacuum energy, which is the basis of the multiple-scattering formalism. As an illustration, we explicitly derive the Lifshitz formula for the interaction between parallel dielectric semispaces, including dispersion, starting from the expression for the total energy of the system. The issues of constancy of the energy between parallel plates and of the observability of electrostrictive forces are briefly addressed.

Milton, Kimball A.; Wagner, Jef; Parashar, Prachi; Brevik, Iver [Oklahoma Center for High Energy Physics and Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019-2061 (United States); Department of Energy and Process Engineering, Norwegian University of Science and Technology, N-7491 Trondheim (Norway)

2010-03-15T23:59:59.000Z

231

Nonlinear time-fractional dispersive equations  

E-Print Network (OSTI)

In this paper we study some cases of time-fractional nonlinear dispersive equations (NDEs) involving Caputo derivatives, by means of the invariant subspace method. This method allows to find exact solutions to nonlinear time-fractional partial differential equations by separating variables. We first consider a third order time-fractional NDE that admits a four-dimensional invariant subspace and we find a similarity solution. We also study a fifth order NDE. In this last case we find a solution involving Mittag-Leffler functions. We finally observe that the invariant subspace method permits to find explicit solutions for a wide class of nonlinear dispersive time-fractional equations.

P. Artale Harris; R. Garra

2014-10-29T23:59:59.000Z

232

Method of dispersing particulate aerosol tracer  

DOE Patents (OSTI)

A particulate aerosol tracer which comprises a particulate carrier of sheet silicate composition having a particle size up to one micron, and a cationic dopant chemically absorbed in solid solution in the carrier. The carrier is preferably selected from the group consisting of natural mineral clays such as bentonite, and the dopant is selected from the group consisting of rare earth elements and transition elements. The tracers are dispersed by forming an aqueous salt solution with the dopant present as cations, dispersing the carriers in the solution, and then atomizing the solution under heat sufficient to superheat the solution droplets at a level sufficient to prevent reagglomeration of the carrier particles.

O'Holleran, Thomas P. (Belleville, MI)

1988-01-01T23:59:59.000Z

233

oil-emulsion (rotary) drilling fluid  

Science Journals Connector (OSTI)

oil-emulsion (rotary) drilling fluid, oil-emulsion fluid [Used where low fluid-loss, very thin cake, and good lubrication of the drill pipe are of primary importance, such as in directional drilling ...

2014-08-01T23:59:59.000Z

234

oil-base(d) (rotary) drilling fluid  

Science Journals Connector (OSTI)

oil-base(d) (rotary) drilling fluid, oil-base(d) fluid [Used primarily for drilling-in or recomputing wells in formations subject ... with low formation pressures. See remark under drilling fluid] ...

2014-08-01T23:59:59.000Z

235

Lattice Boltzmann simulations of complex fluids  

Science Journals Connector (OSTI)

......research-article Articles Lattice Boltzmann simulations of complex fluids...OX1 3NP, UK We discuss how lattice Boltzmann simulations can be used to model...binary and lamellar fluids. lattice Boltzmann|complex fluids|shear flow......

J. M. YEOMANS; ALEXANDER J. WAGNER

2000-10-01T23:59:59.000Z

236

Multipurpose Acoustic Sensor for Downhole Fluid Monitoring  

Energy.gov (U.S. Department of Energy (DOE))

Novel sensor design based on acoustics. Determine in real-timeand in a single sensor packagemultiple parameters: temperature, pressure, fluid flow; and fluid properties, such as density, viscosity, fluid composition.

237

Effects of dispersants and soluble counter-ions on aqueous dispersibility of nano-sized zirconia powder  

Science Journals Connector (OSTI)

The effect of different dispersants and water leaching on aqueous dispersibility of zirconia powder was studied. Zeta potentials of aqueous solutions containing nano-sized zirconia powder and different dispersants, such as ammonium polyacrylic acid (PAA-NH4) and tetramethyl ammonium hydroxide (TMAH) and water leaching were characterized. Better dispersion of nano-sized zirconia powder in aqueous solutions was achieved with the addition of dispersant and water leaching.

Zhipeng Xie; Jingtao Ma; Qing Xu; Yong Huang; Yi-Bing Cheng

2004-01-01T23:59:59.000Z

238

A method to extend flamelet manifolds for prediction of NOx and long time scale species with tabulated chemistry  

Science Journals Connector (OSTI)

Numerical simulation is currently used to help design low NOx devices for aircraft engines. In order to improve the prediction of pollutant species, combustion models based on tabulated chemistry have been commonly used in recent years. However, the short time scales of usual flamelet manifolds can lead to errors concerning the NO prediction in post flame area, as shown in this paper. Thus, a new method is proposed to extend the manifold in order to describe the evolution of species with a long characteristic time. This method is tested in the framework of 0D-1D computations. The use of the extended manifold is shown to be necessary to correctly predict the evolution of NO concentration in burnt gases. As an example, the extended and classical manifolds were compared in the framework of 2D simulations of an industrial-like combustor, showing an evident difference on the NO levels predicted in the outlet section.

Aymeric Boucher; Nicolas Bertier; Francis Dupoirieux

2014-01-01T23:59:59.000Z

239

On the counting function of the embedded eigenvalues for some manifold with cusps, and magnetic Laplacian  

E-Print Network (OSTI)

We consider a non compact, complete manifold {\\bf{M}} of finite area with cuspidal ends. The generic cusp is isomorphic to ${\\bf{X}}\\times ]1,+\\infty [$ with metric $ds^2=(h+dy^2)/y^{2\\delta}.$ {\\bf{X}} is a compact manifold with nonzero first Betti number equipped with the metric $h.$ For a one-form $A$ on {\\bf{M}} such that in each cusp $A$ is a non exact one-form on the boundary at infinity, we prove that the magnetic Laplacian $-\\Delta_A=(id+A)^\\star (id+A)$ satisfies the Weyl asymptotic formula with sharp remainder. We deduce an upper bound for the counting function of the embedded eigenvalues of the Laplace-Beltrami operator $-\\Delta =-\\Delta_0 .$

Morame, Abderemane

2011-01-01T23:59:59.000Z

240

Counting function of the embedded eigenvalues for some manifold with cusps, and magnetic Laplacian  

E-Print Network (OSTI)

We consider a non compact, complete manifold {\\bf{M}} of finite area with cuspidal ends. The generic cusp is isomorphic to ${\\bf{X}}\\times ]1,+\\infty [$ with metric $ds^2=(h+dy^2)/y^{2\\delta}.$ {\\bf{X}} is a compact manifold with nonzero first Betti number equipped with the metric $h.$ For a one-form $A$ on {\\bf{M}} such that in each cusp $A$ is a non exact one-form on the boundary at infinity, we prove that the magnetic Laplacian $-\\Delta_A=(id+A)^\\star (id+A)$ satisfies the Weyl asymptotic formula with sharp remainder. We deduce an upper bound for the counting function of the embedded eigenvalues of the Laplace-Beltrami operator $-\\Delta =-\\Delta_0.$

Abderemane Morame; Francoise Truc

2011-09-09T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

The Construction of Spinor Fields on Manifolds with Smooth Degenerate Metrics  

E-Print Network (OSTI)

We examine some of the subtleties inherent in formulating a theory of spinors on a manifold with a smooth degenerate metric. We concentrate on the case where the metric is singular on a hypersurface that partitions the manifold into Lorentzian and Euclidean domains. We introduce the notion of a complex spinor fibration to make precise the meaning of continuity of a spinor field and give an expression for the components of a local spinor connection that is valid in the absence of a frame of local orthonormal vectors. These considerations enable one to construct a Dirac equation for the discussion of the behavior of spinors in the vicinity of the metric degeneracy. We conclude that the theory contains more freedom than the spacetime Dirac theory and we discuss some of the implications of this for the continuity of conserved currents.

J Schray; T Dray; C A Manogue; R W Tucker; C Wang

1996-05-17T23:59:59.000Z

242

Bose-Einstein Condensation on a Manifold with Nonnegative Ricci Curvature  

E-Print Network (OSTI)

The Bose-Einstein condensation for an ideal Bose gas and for a dilute weakly interacting Bose gas in a manifold with nonnegative Ricci curvature is investigated using the heat kernel and eigenvalue estimates of the Laplace operator. The main focus is on the nonrelativistic gas. However, special relativistic ideal gas is also discussed. The thermodynamic limit of the heat kernel and eigenvalue estimates is taken and the results are used to derive bounds for the depletion coefficient. In the case of a weakly interacting gas Bogoliubov approximation is employed. The ground state is analyzed using heat kernel methods and finite size effects on the ground state energy are proposed. The justification of the c-number substitution on a manifold is given.

Levent Akant; Emine Ertugrul; Ferzan Tapramaz; O. Teoman Turgut

2014-03-28T23:59:59.000Z

243

Computational fluid dynamic applications  

SciTech Connect

The rapid advancement of computational capability including speed and memory size has prompted the wide use of computational fluid dynamics (CFD) codes to simulate complex flow systems. CFD simulations are used to study the operating problems encountered in system, to evaluate the impacts of operation/design parameters on the performance of a system, and to investigate novel design concepts. CFD codes are generally developed based on the conservation laws of mass, momentum, and energy that govern the characteristics of a flow. The governing equations are simplified and discretized for a selected computational grid system. Numerical methods are selected to simplify and calculate approximate flow properties. For turbulent, reacting, and multiphase flow systems the complex processes relating to these aspects of the flow, i.e., turbulent diffusion, combustion kinetics, interfacial drag and heat and mass transfer, etc., are described in mathematical models, based on a combination of fundamental physics and empirical data, that are incorporated into the code. CFD simulation has been applied to a large variety of practical and industrial scale flow systems.

Chang, S.-L.; Lottes, S. A.; Zhou, C. Q.

2000-04-03T23:59:59.000Z

244

Fluid flow monitoring device  

DOE Patents (OSTI)

A flow meter and temperature measuring device are described comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips. 7 figures.

McKay, M.D.; Sweeney, C.E.; Spangler, B.S. Jr.

1993-11-30T23:59:59.000Z

245

Fluid flow monitoring device  

DOE Patents (OSTI)

A flow meter and temperature measuring device comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips.

McKay, Mark D. (1426 Socastee Dr., North Augusta, SC 29841); Sweeney, Chad E. (3600 Westhampton Dr., Martinez, GA 30907-3036); Spangler, Jr., B. Samuel (2715 Margate Dr., Augusta, GA 30909)

1993-01-01T23:59:59.000Z

246

Fluid sampling system  

DOE Patents (OSTI)

An fluid sampling system allows sampling of radioactive liquid without spillage. A feed tank is connected to a liquid transfer jet powered by a pumping chamber pressurized by compressed air. The liquid is pumped upwardly into a sampling jet of a venturi design having a lumen with an inlet, an outlet, a constricted middle portion, and a port located above the constricted middle portion. The liquid is passed under pressure through the constricted portion causing its velocity to increase and its pressure to be decreased, thereby preventing liquid from escaping. A septum sealing the port can be pierced by a two pointed hollow needle leading into a sample bottle also sealed by a pierceable septum affixed to one end. The bottle is evacuated by flow through the sample jet, cyclic variation in the sampler jet pressure periodically leaves the evacuated bottle with lower pressure than that of the port, thus causing solution to pass into the bottle. The remaining solution in the system is returned to the feed tank via a holding tank. 4 figs.

Houck, E.D.

1994-10-11T23:59:59.000Z

247

Tracing Geothermal Fluids  

SciTech Connect

Geothermal water must be injected back into the reservoir after it has been used for power production. Injection is critical in maximizing the power production and lifetime of the reservoir. To use injectate effectively the direction and velocity of the injected water must be known or inferred. This information can be obtained by using chemical tracers to track the subsurface flow paths of the injected fluid. Tracers are chemical compounds that are added to the water as it is injected back into the reservoir. The hot production water is monitored for the presence of this tracer using the most sensitive analytic methods that are economically feasible. The amount and concentration pattern of the tracer revealed by this monitoring can be used to evaluate how effective the injection strategy is. However, the tracers must have properties that suite the environment that they will be used in. This requires careful consideration and testing of the tracer properties. In previous and parallel investigations we have developed tracers that are suitable from tracing liquid water. In this investigation, we developed tracers that can be used for steam and mixed water/steam environments. This work will improve the efficiency of injection management in geothermal fields, lowering the cost of energy production and increasing the power output of these systems.

Michael C. Adams; Greg Nash

2004-03-01T23:59:59.000Z

248

Composite media for fluid stream processing, a method of forming the composite media, and a related method of processing a fluid stream  

DOE Patents (OSTI)

A composite media including at least one crystalline aluminosilicate material in polyacrylonitrile. A method of forming a composite media is also disclosed. The method comprises dissolving polyacrylonitrile in an organic solvent to form a matrix solution. At least one crystalline aluminosilicate material is combined with the matrix solution to form a composite media solution. The organic solvent present in the composite media solution is diluted. The composite media solution is solidified. In addition, a method of processing a fluid stream is disclosed. The method comprises providing a beads of a composite media comprising at least one crystalline aluminosilicate material dispersed in a polyacrylonitrile matrix. The beads of the composite media are contacted with a fluid stream comprising at least one constituent. The at least one constituent is substantially removed from the fluid stream.

Garn, Troy G; Law, Jack D; Greenhalgh, Mitchell R; Tranter, Rhonda

2014-04-01T23:59:59.000Z

249

Detachment Energies of Spheroidal Particles from Fluid-Fluid Interfaces  

E-Print Network (OSTI)

The energy required to detach a single particle from a fluid-fluid interface is an important parameter for designing certain soft materials, for example, emulsions stabilised by colloidal particles, colloidosomes designed for targeted drug delivery, and bio-sensors composed of magnetic particles adsorbed at interfaces. For a fixed particle volume, prolate and oblate spheroids attach more strongly to interfaces because they have larger particle-interface areas. Calculating the detachment energy of spheroids necessitates the difficult measurement of particle-liquid surface tensions, in contrast with spheres, where the contact angle suffices. We develop a simplified detachment energy model for spheroids which depends only on the particle aspect ratio and the height of the particle centre of mass above the fluid-fluid interface. We use lattice Boltzmann simulations to validate the model and provide quantitative evidence that the approach can be applied to simulate particle-stabilized emulsions, and highlight the experimental implications of this validation.

Gary B. Davies; Timm Krger; Peter V. Coveney; Jens Harting

2014-07-01T23:59:59.000Z

250

Downhole Fluid Sampling | Open Energy Information  

Open Energy Info (EERE)

Downhole Fluid Sampling Downhole Fluid Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Downhole Fluid Sampling Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Well Testing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Water composition and source of fluids. Gas composition and source of fluids. Thermal: Water temperature. Distinguish magmatic/mantle heat inputs. Can be used to estimate reservoir fluid temperatures. Dictionary.png Downhole Fluid Sampling: Downhole fluid sampling is done to characterize the chemical, thermal, or hydrological properties of a surface or subsurface aqueous system. Downhole

251

Isotopic Analysis- Fluid | Open Energy Information  

Open Energy Info (EERE)

Isotopic Analysis- Fluid Isotopic Analysis- Fluid Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Isotopic Analysis- Fluid Details Activities (61) Areas (32) Regions (6) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Fluid Lab Analysis Parent Exploration Technique: Fluid Lab Analysis Information Provided by Technique Lithology: Water rock interaction Stratigraphic/Structural: Hydrological: Origin of hydrothermal fluids; Mixing of hydrothermal fluids Thermal: Isotopic ratios can be used to characterize and locate subsurface thermal anomalies. Dictionary.png Isotopic Analysis- Fluid: Isotopes are atoms of the same element that have different numbers of neutrons. An isotopic analysis looks at a particular isotopic element(s) in

252

Gel Evolution in Oil Based Drilling Fluids.  

E-Print Network (OSTI)

?? Drilling fluids make up an essential part of the drilling operation. Successful drilling operations rely on adequate drilling fluid quality. With the development of (more)

Sandvold, Ida

2012-01-01T23:59:59.000Z

253

Shale Gas Development Challenges: Fracture Fluids | Department...  

Office of Environmental Management (EM)

Fluids Shale Gas Development Challenges: Fracture Fluids More Documents & Publications Natural Gas from Shale: Questions and Answers Shale Gas Glossary FracFocus 2.0 Task Force...

254

Chemically Reactive Working Fluids | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chemically Reactive Working Fluids for the Capture and Transport of Concentrated Solar Thermal Energy for Power Generation Chemically Reactive Working Fluids SunShot CSP...

255

Acoustic Concentration Of Particles In Fluid Flow  

NLE Websites -- All DOE Office Websites (Extended Search)

in a fluid flow includes a substantially acoustically transparent membrane and a vibration generator that define a fluid flow path therebetween. Available for thumbnail of...

256

Fluid Gravity Engineering Rocket motor flow analysis  

E-Print Network (OSTI)

Fluid Gravity Engineering Capability · Rocket motor flow analysis -Internal (performance) -External young scientists/engineers Fluid Gravity Engineering Ltd #12;

Anand, Mahesh

257

Study of Pollutant Dispersion in Urban Environments  

E-Print Network (OSTI)

power plant using coal releases great amounts of harmful gases to produce the electric energy head: Study of pollutant dispersion in urban environments #12;Abstract Computational simulations can mechanics with the use of computer models and simulations. In this study the simulations of the complex

Allen, Gabrielle

258

Localized overlap algorithm for unexpanded dispersion energies  

SciTech Connect

First-principles-based, linearly scaling algorithm has been developed for calculations of dispersion energies from frequency-dependent density susceptibility (FDDS) functions with account of charge-overlap effects. The transition densities in FDDSs are fitted by a set of auxiliary atom-centered functions. The terms in the dispersion energy expression involving products of such functions are computed using either the unexpanded (exact) formula or from inexpensive asymptotic expansions, depending on the location of these functions relative to the dimer configuration. This approach leads to significant savings of computational resources. In particular, for a dimer consisting of two elongated monomers with 81 atoms each in a head-to-head configuration, the most favorable case for our algorithm, a 43-fold speedup has been achieved while the approximate dispersion energy differs by less than 1% from that computed using the standard unexpanded approach. In contrast, the dispersion energy computed from the distributed asymptotic expansion differs by dozens of percent in the van der Waals minimum region. A further increase of the size of each monomer would result in only small increased costs since all the additional terms would be computed from the asymptotic expansion.

Rob, Fazle; Szalewicz, Krzysztof [Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States)] [Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States); Misquitta, Alston J. [School of Physics and Astronomy, Queen Mary, University of London, London E1 4NS (United Kingdom)] [School of Physics and Astronomy, Queen Mary, University of London, London E1 4NS (United Kingdom); Podeszwa, Rafa? [Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice (Poland)] [Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice (Poland)

2014-03-21T23:59:59.000Z

259

8, 67936824, 2008 dispersion rates in  

E-Print Network (OSTI)

patterns, it is shown that initial buoyancy fluxes at ship stack have minor effect on plume dilution rate modeling and measurement (remote or "in-situ") studies of ship exhaust25 effects must dealACPD 8, 6793­6824, 2008 Ship plume dispersion rates in convective BL F. Chosson et al. Title Page

Paris-Sud XI, Université de

260

Dispersal Pathways for Particle-Associated Pollutants  

Science Journals Connector (OSTI)

...sediments in the bight apex revealed that...muddy Christiaensen Basin, adjacent to the...for the New York Bight apex, Hudson-Raritan...ing Christiaensen Basin (12 percent by weight...0. May 1974 Aug Bight apex as highly dispersive...the Christiaensen Basin and the Hudson Shelf...

Robert A. Young; Donald J. P. Swift; Thomas L. Clarke; George R. Harvey; Peter R. Betzer

1985-08-02T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Phonon dispersion of graphite J. Maultzsch  

E-Print Network (OSTI)

the acoustic branches below 400 cm-1 were measured by inelastic neutron scattering [1]. The optical phonons. The phonon dispersion of graphite was determined by inelastic X-ray scattering along the -K, K-M, and -K. This coupling dominates the scattering mechanism in both electronic transport and Raman scattering. Many

Nabben, Reinhard

262

Dispersing brush mice prefer habitat like home  

Science Journals Connector (OSTI)

...Dispersing brush mice prefer habitat like home Karen E Mabry * Judy A Stamps * Author...habitat similar to that at our study site, home ranges were 0.11-0.15ha, and no between-sex difference in adult home range size was detected (Kalcounis-Ruppell...

2008-01-01T23:59:59.000Z

263

Harnessing fluid-structure interactions to design self-regulating acoustic metamaterials  

SciTech Connect

The design of phononic crystals and acoustic metamaterials with tunable and adaptive wave properties remains one of the outstanding challenges for the development of next generation acoustic devices. We report on the numerical and experimental demonstration of a locally resonant acoustic metamaterial with dispersion characteristics, which autonomously adapt in response to changes of an incident aerodynamic flow. The metamaterial consists of a slender beam featuring a periodic array or airfoil-shaped masses supported by a linear and torsional springs. The resonance characteristics of the airfoils lead to strong attenuation at frequencies defined by the properties of the airfoils and the speed on the incident fluid. The proposed concept expands the ability of existing acoustic bandgap materials to autonomously adapt their dispersion properties through fluid-structure interactions, and has the potential to dramatically impact a variety of applications, such as robotics, civil infrastructures, and defense systems.

Casadei, Filippo [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Bertoldi, Katia [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Kavli Institute for Bionano Science, Harvard University, Cambridge, Massachusetts 02138 (United States)

2014-01-21T23:59:59.000Z

264

Fluid Imaging | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit History Facebook icon Twitter icon » Fluid Imaging Jump to: navigation, search Contents 1 Geothermal Lab Call Projects for Fluid Imaging 2 Geothermal ARRA Funded Projects for Fluid Imaging Geothermal Lab Call Projects for Fluid Imaging Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":14,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

265

Bio-inspired fluid locomotion  

E-Print Network (OSTI)

We have developed several novel methods of locomotion at low Reynolds number, for both Newtonian and non-Newtonian fluids: Robosnails 1 and 2, which operate on a lubrication layer, and the three-link swimmer which moves ...

Chan, Brian, 1980-

2009-01-01T23:59:59.000Z

266

Self-similar perfect fluids  

E-Print Network (OSTI)

Space-times admitting an $r$-parameter Lie group of homotheties are studied for $r > 2$ devoting a special attention to those representing perfect fluid solutions to Einstein's field equations.

J. Carot; A. M. Sintes

2000-05-16T23:59:59.000Z

267

Biocatalytic transformations of hydrothermal fluids  

Science Journals Connector (OSTI)

...emission into oxygenated ambient seawater. The large metabolic and physiological...emission into oxygenated ambient seawater. The large metabolic and physiological...DNA (the reproducing genetic storage for each species), individual...where entrained oxygenated seawater mixes with hydrothermal fluid...

1997-01-01T23:59:59.000Z

268

Atomistic methods in fluid simulation  

Science Journals Connector (OSTI)

...easily describable by traditional methods, as ICF involves a complex coupling between fluid instabilities and combustion processes at very small length and times scales. One contribution of 13 to a Theme Issue Turbulent mixing and beyond . Figure...

2010-01-01T23:59:59.000Z

269

PC-SAFT modeling of asphaltene phase behavior in the presence of nonionic dispersants  

Science Journals Connector (OSTI)

Abstract This study introduced a new method to characterize asphaltenes in PC-SAFT equation of state (EOS) and correctly model the effect of nonionic dispersants on the thermodynamic behavior of asphaltenes. Our approach is to combine microscale parameters from Molecular Dynamics (MD) simulations with Perturbed Chain Statistical Associating Fluid Theory (PC-SAFT) to develop a comprehensive model that enables the prediction of macroscopic behavior such as the amount and onset of asphaltene precipitation at various pressures, temperatures, and fluid compositions. More specifically, association parameters were considered for asphaltene molecules and determined by equating the Gibbs energy of association calculated by PC-SAFT EOS to the one obtained from MD simulations. A correlation was derived to relate the association energy parameter (?AB) of asphaltenes to the molar weight of their aromatic cores. Our model showed that asphaltene association energy is affected by temperature and solvent type and is inversely proportional to the solubility parameter of the medium. The hetero-segment approach in PC-SAFT EOS was adopted to accurately characterize asphaltene molecules and their non-association parameters in PC-SAFT were determined based on the molecular weight and aromaticity factor of asphaltenes. Moreover, the average aggregation number of asphaltene nanoaggregates was calculated using the Wertheim association theory. This model was applied to predict asphaltene precipitation envelopes for three different live crude oils and showed excellent agreement with experimental data in the literature. Additionally, the model could correctly predict the amount of asphaltene precipitation upon addition of nonionic dispersants.

Mohammad Sedghi; Lamia Goual

2014-01-01T23:59:59.000Z

270

Transparent fluids for 157-nm immersion lithography  

E-Print Network (OSTI)

- gineers. [DOI: 10.1117/1.1637366] Subject terms: 157-nm lithography; immersion fluid; perfluoropolyether

Rollins, Andrew M.

271

Pitch-catch only ultrasonic fluid densitometer  

DOE Patents (OSTI)

The present invention is an ultrasonic fluid densitometer that uses a material wedge and pitch-catch only ultrasonic transducers for transmitting and receiving ultrasonic signals internally reflected within the material wedge. Density of a fluid is determined by immersing the wedge into the fluid and measuring reflection of ultrasound at the wedge-fluid interface.

Greenwood, Margaret S. (Richland, WA); Harris, Robert V. (Pasco, WA)

1999-01-01T23:59:59.000Z

272

Pitch-catch only ultrasonic fluid densitometer  

DOE Patents (OSTI)

The present invention is an ultrasonic fluid densitometer that uses a material wedge and pitch-catch only ultrasonic transducers for transmitting and receiving ultrasonic signals internally reflected within the material wedge. Density of a fluid is determined by immersing the wedge into the fluid and measuring reflection of ultrasound at the wedge-fluid interface. 6 figs.

Greenwood, M.S.; Harris, R.V.

1999-03-23T23:59:59.000Z

273

Fluid Mechanics IB Lecturer: Dr Natalia Berloff  

E-Print Network (OSTI)

-efficient aircraft design, hydroelectric power, chemical processing, jet-driven cutting tools · our fluid environment

274

Particle dispersion by random waves in the rotating Boussinesq system  

E-Print Network (OSTI)

We present a theoretical and numerical study of horizontal particle dispersion due to random waves in the three-dimensional rotating and stratified Boussinesq system, which serves as a simple model to study the dispersion ...

Ferrari, Raffaele

275

Viscosity model of high-viscosity dispersing system  

Science Journals Connector (OSTI)

High-viscosity dispersing system is formed by dispersing the solid particles in the high-viscosity continuous medium. It is very easy to ... the rheology behavior becomes complicated. The apparent viscosity of th...

Xian-fu Wei ???; Na Wang ??

2008-09-01T23:59:59.000Z

276

Update 1 to: A Dispersion Modeling Analysis of Downwash from...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Update 1 to: A Dispersion Modeling Analysis of Downwash from Mirant's Potomac River Power Plant, Modeling Unit 1 Emissions in a Cycling Mode Update 1 to: A Dispersion Modeling...

277

Thermal boundary layer development in dispersed flow film boiling  

E-Print Network (OSTI)

Dispersed flow film boiling consists of a dispersion of droplets which are carried over a very hot surface by their vapor. This process occurs in cryogenic equipment and wet steam turbines. It is also of interest in the ...

Hull, Lawrence M.

1982-01-01T23:59:59.000Z

278

Dispersion modeling of ground-level area sources of particulate  

E-Print Network (OSTI)

The use of dispersion modeling by State Air Pollution hics. Regulatory Agencies (SAPRAS) is increasing. Dispersion modeling provides a quick and efficient means of determining the downwind impact of pollutant release from a source. The SAPRAS...

Fritz, Bradley Keith

2012-06-07T23:59:59.000Z

279

Geographic dispersion in teams : its history, experience, measurement, and change  

E-Print Network (OSTI)

This thesis begins with the simple argument that geographic dispersion has gone surprisingly unexamined despite its role as the domain-defining construct for geographically dispersed teams (a.k.a. "virtual teams"). The ...

O'Leary, Michael Boyer, 1969-

2002-01-01T23:59:59.000Z

280

Paper Number -1-Simulation model of dispersions in turning process  

E-Print Network (OSTI)

Paper Number -1- Simulation model of dispersions in turning process Wolff Valery 1, Lefebvre Arnaud. In this paper, an extent of the simulation model of dispersions in turning process first exposed in [W1

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Dispersion-free radial transmission lines  

DOE Patents (OSTI)

A dispersion-free radial transmission line ("DFRTL") preferably for linear accelerators, having two plane conductors each with a central hole, and an electromagnetically permeable material ("EPM") between the two conductors and surrounding a channel connecting the two holes. At least one of the material parameters of relative magnetic permeability, relative dielectric permittivity, and axial width of the EPM is varied as a function of radius, so that the characteristic impedance of the DFRTL is held substantially constant, and pulse transmission therethrough is substantially dispersion-free. Preferably, the EPM is divided into concentric radial sections, with the varied material parameters held constant in each respective section but stepwise varied between sections as a step function of the radius. The radial widths of the concentric sections are selected so that pulse traversal time across each section is the same, and the varied material parameters of the concentric sections are selected to minimize traversal error.

Caporaso, George J. (Livermore, CA); Nelson, Scott D. (Patterson, CA)

2011-04-12T23:59:59.000Z

282

HIGHLY DISPERSED ALLOY CATHODE CATALYST FOR DURABILITY  

E-Print Network (OSTI)

Understanding high performance materials Pt/C cathode B.S.E. Pt PtCo/C cathode IrB.S.E. Pt Co PtIrCo/C cathodeHIGHLY DISPERSED ALLOY CATHODE CATALYST FOR DURABILITY T. D. Jarvi UTC Power Corporation Electrochemical Area Loss Activity at 900 mVRHE (IR-Free) 0.44 A/mg Pt Specific Activity at 900 m

283

Dispersion relation for magnetosonic waves within the upper atmospheric plasma  

Science Journals Connector (OSTI)

The dispersion relation for magnetosonic waves within the upper atmospheric plasma has been derived. The result can be...

S. S. De; Bithika Ghosh; Manasi Mal; B. Ghosh

1990-01-01T23:59:59.000Z

284

Spontaneous evolution of self-assembled phases from anisotropic colloidal dispersions  

E-Print Network (OSTI)

We investigate the spontaneous evolution of various self-assembled phase states from a homogeneous aqueous dispersion of high-aspect ratio Montmorillonite (Na Cloisite) nanoclay platelets grounded on the observations made over a period of 3.5 years. We have established the tw-c phase diagram for this system for the first time in salt-free suspensions under normal pH conditions using rheology experiments and have detected that these suspensions do undergo nontrivial phase evolution and aging dynamics. Distinctive phase separation, equilibrium fluid and equilibrium gels in the tw-c phase space are discovered. Cole-Cole plots derived from rheology measurements suggested the presence of inter connected network-like structures for c > cg, cg being the gelation concentration. All dispersions formed stable sols during the initial time, and with aging network-like structures were found to form via two routes: one for c cg, through equilibrium gelation. This has invoked and called for a revisit of the phase diagram of aging MMT dispersions.

Ravi Kumar Pujala; Nidhi Joshi; H. B. Bohidar

2013-06-07T23:59:59.000Z

285

Omega?to?the?one?third term in dispersion relation for acoustic pulse propagation through turbulence  

Science Journals Connector (OSTI)

The authors earlier formulation of pulse propagation through turbulence required a somewhat ad hoc separation of the effects of large scale and small scale turbulence with the selection of a cut?off turbulentwave number k c that separates the two regimes. A neater?cleaner formulation proceeds with the premise that the frequency dispersion of pulses is caused by that part of the turbulence spectrum which lies in the inertial range originally predicted by Kolmogoroff. The acoustic propagating waves dispersion relation has the acoustic wave number being of the form k=(?/c)+F(?) where c is a spatially averaged sound speed and where for mechanical turbulence the extra term F(?) must depend on only the angular frequency ? the sound speedc and the turbulent energy dissipation ? per unit fluid mass and per unit time. If the turbulence is weak then the quantity F(?) has to be of second order in the portions of the turbulent fluid velocity in the intertial range so following Kolmogoroffs reasoning it must vary with ? as ?2/3. Simple dimensional analysis then reveals that F(?) is K?2/3 c ?7/3?1/3 the latter factor being as announced in the title of this abstract and K being a universal dimensionless complex constant. A similar result holds for thermal turbulence. The analysis showing that the separating?out of the effects of turbulence in the inertial regime is in fact possible yields K=?0.37e i?/3. The dispersion is typically small but has an accumulative effect that leads to a sizable pulse distortion over large propagation distances. [Work supported by NASA Langley Research Center.

Allan D. Pierce

1995-01-01T23:59:59.000Z

286

Human-mediated dispersal of seeds over long distances  

Science Journals Connector (OSTI)

...38 Bo: 1.55 power exponential...the mechanistic wind dispersal model...3.90.11 plant height (m) B...dispersal kernel for wind dispersal and...Average vertical winds (table 2, scenario...and the fitted power-exponential...scenarios: (a,b) plant growing next to...

2009-01-01T23:59:59.000Z

287

Biogenic Hydroxylated Carboxylate Monomers Serve as Dispersants for  

E-Print Network (OSTI)

, such as polymethacrylic acid (PM.AA) and polyacrylic acid (PAA) are used as dispersants (1). Similarly, previous work from as dispersion additives in the processing ofceramic particles. Only carboxylic acids containing one or more, particle packing, and dispersant adsorption characeristics indicated that carboxylic acid groups

Aksay, Ilhan A.

288

Quantum nuclear effects on surfaces and dispersion bonded systems  

E-Print Network (OSTI)

Quantum nuclear effects on surfaces and dispersion bonded systems Erlend Davidson A dissertation all system types. In particular long range van der Waals dispersion forces and quantum nuclear effects of the art methods to include van der Waals dispersion and quantum nuclear effects on a range of well defined

Guillas, Serge

289

DEVELOPMENT OF NEW DRILLING FLUIDS  

SciTech Connect

The goal of the project has been to develop new types of drill-in fluids (DIFs) and completion fluids (CFs) for use in natural gas reservoirs. Phase 1 of the project was a 24-month study to develop the concept of advanced type of fluids usable in well completions. Phase 1 tested this concept and created a kinetic mathematical model to accurately track the fluid's behavior under downhole conditions. Phase 2 includes tests of the new materials and practices. Work includes the preparation of new materials and the deployment of the new fluids and new practices to the field. The project addresses the special problem of formation damage issues related to the use of CFs and DIFs in open hole horizontal well completions. The concept of a ''removable filtercake'' has, as its basis, a mechanism to initiate or trigger the removal process. Our approach to developing such a mechanism is to identify the components of the filtercake and measure the change in the characteristics of these components when certain cleanup (filtercake removal) techniques are employed.

David B. Burnett

2003-08-01T23:59:59.000Z

290

E-Print Network 3.0 - atmospheric dispersion experiment Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

- WIND DISPERSAL IN FRESHWATER WETLANDS: KNOWLEDGE FOR CONSERVATION AND RESTORATION - 271 Applied... , dispersal by wind is often overlooked because dispersal by water is ......

291

Test results of a ceramic-based carbon monoxide sensor in the automotive exhaust manifold  

SciTech Connect

A prototype CO sensor based on the anatase phase of TiO{sub 2} was fabricated and tested in a Ford V6 engine. Fuel combustion was programmed to be near stoichiometric conditions, and emissions were monitored with an FT-IR analytical instrument. The sensor, positioned near the oxygen sensor in the exhaust manifold, was successfully tested for 50 cycles of revving and idling, and was observed to respond quickly and reproducibly. The sensor response was correlated to the CO concentration at specific engine temperatures and was found to vary systematically with increasing concentrations. The results are promising and the sensor shows potentials to monitor the efficiency of the catalytic converter.

Azad, A.M.; Younkman, L.B.; Akbar, S.A. [Ohio State Univ., Columbus, OH (United States)

1996-12-31T23:59:59.000Z

292

Smith theory, L2 cohomology, isometries of locally symmetric manifolds and moduli spaces of curves  

E-Print Network (OSTI)

We investigate periodic diffeomorphisms of non-compact aspherical manifolds (and orbifolds) and describe a class of spaces that have no homotopically trivial periodic diffeomorphisms. Prominent examples are moduli spaces of curves and aspherical locally symmetric spaces with non-vanishing Euler characteristic. In the irreducible locally symmetric case, we show that no complete metric has more symmetry than the locally symmetric metric. In the moduli space case, we build on work of Farb and Weinberger and prove an analogue of Royden's theorem for complete finite volume metrics.

Avramidi, Grigori

2011-01-01T23:59:59.000Z

293

SO(10) Grand Unification in M theory on a G2 manifold  

E-Print Network (OSTI)

We consider Grand Unified Theories based on $SO(10)$ which originate from string/$M$ theory on $G_2$ manifolds or Calabi-Yau spaces with discrete symmetries. In this framework we are naturally led to a novel solution of the doublet-triplet splitting problem previously considered by Dvali which involves an extra vector-like Standard Model family and light, but weakly coupled colour triplets. These additional states are predicted to be accessible at the LHC and also induce R-parity violation. Gauge coupling unification occurs with a larger GUT coupling.

Acharya, Bobby S; Romao, Miguel Crispim; King, Stephen F; Pongkitivanichkul, Chakrit

2015-01-01T23:59:59.000Z

294

Viscosity of a nucleonic fluid  

E-Print Network (OSTI)

The viscosity of nucleonic matter is studied both classically and in a quantum mechanical description. The collisions between particles are modeled as hard sphere scattering as a baseline for comparison and as scattering from an attractive square well potential. Properties associated with the unitary limit are developed which are shown to be approximately realized for a system of neutrons. The issue of near perfect fluid behavior of neutron matter is remarked on. Using some results from hard sphere molecular dynamics studies near perfect fluid behavior is discussed further.

Aram Z. Mekjian

2012-03-21T23:59:59.000Z

295

Non-Dispersive, Accelerated Matter-Waves  

E-Print Network (OSTI)

It is shown that under certain dynamical conditions a material wave packet displays coherent, non-dispersive accelerated evolution in gravitational field over a modulated atomic mirror. The phenomenon takes place as a consequence of simultaneous presence of the dynamical localization and the coherent Fermi acceleration for the same modulation amplitude. It is purely a quantum mechanical effect as the windows of modulation strengths supporting dynamical localization and Fermi acceleration overlap for larger effective Plank constant. Present day experimental techniques make it feasible to realize the system in laboratory.

Farhan Saif; Khalid Naseer; Muhammad Ayub

2014-06-22T23:59:59.000Z

296

Solid electrolytes strengthened by metal dispersions  

DOE Patents (OSTI)

An improvement in solid electrolytes of advanced secondary batteries of the sodium-sulfur, sodium-halogen, and like combinations is achieved by providing said battery with a cermet electrolyte containing a metal dispersion ranging from 0.1 to 10.0 vol. % of a substantially nonreactive metal selected from the group consisting essentially of Pt, Cr, Fe, Co, Ni, Nb, their alloys, and their physical mixtures in the elemental or uncombined state, the remainder of said cermet being an ion-conductive ceramic material.

Lauf, R.J.; Morgan, C.S.

1981-10-05T23:59:59.000Z

297

Solid electrolytes strengthened by metal dispersions  

DOE Patents (OSTI)

An improvement in solid electrolytes of advanced secondary batteries of the sodium-sulfur, sodium-halogen, and like combinations is achieved by providing said battery with a cermet electrolyte containing a metal dispersion ranging from 0.1 to 10.0 vol. % of a substantially nonreactive metal selected from the group consisting essentially of Pt, Cr, Fe, Co, Ni, Nb, their alloys, and their physical mixtures in the elemental or uncombined state, the remainder of said cermet being an ion-conductive ceramic material.

Lauf, Robert J. (Oak Ridge, TN); Morgan, Chester S. (Oak Ridge, TN)

1983-01-01T23:59:59.000Z

298

Compressor bleed cooling fluid feed system  

DOE Patents (OSTI)

A compressor bleed cooling fluid feed system for a turbine engine for directing cooling fluids from a compressor to a turbine airfoil cooling system to supply cooling fluids to one or more airfoils of a rotor assembly is disclosed. The compressor bleed cooling fluid feed system may enable cooling fluids to be exhausted from a compressor exhaust plenum through a downstream compressor bleed collection chamber and into the turbine airfoil cooling system. As such, the suction created in the compressor exhaust plenum mitigates boundary layer growth along the inner surface while providing flow of cooling fluids to the turbine airfoils.

Donahoo, Eric E; Ross, Christopher W

2014-11-25T23:59:59.000Z

299

Directed flow fluid rinse trough  

DOE Patents (OSTI)

Novel rinse troughs accomplish thorough uniform rinsing. The tanks are suitable for one or more essentially planar items having substantially the same shape. The troughs ensure that each surface is rinsed uniformly. The new troughs also require less rinse fluid to accomplish a thorough rinse than prior art troughs.

Kempka, Steven N. (9504 Lona La., Albuquerque, NM 87111); Walters, Robert N. (11872 LaGrange St., Boise, ID 83709)

1996-01-01T23:59:59.000Z

300

Directed flow fluid rinse trough  

DOE Patents (OSTI)

Novel rinse troughs accomplish thorough uniform rinsing. The tanks are suitable for one or more essentially planar items having substantially the same shape. The troughs ensure that each surface is rinsed uniformly. The new troughs also require less rinse fluid to accomplish a thorough rinse than prior art troughs. 9 figs.

Kempka, S.N.; Walters, R.N.

1996-07-02T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Working fluid for Rankine cycle  

SciTech Connect

A Rankine cycle working fluid is disclosed containing a mixture of 2,2,3,3tetrafluoropropanol and water, which is low toxic, incombustible, nonexplosive, noncorrosive and stable, and also has a high critical temperature and forms azeotropic-like composition. It is suited for use in a rankine cycle using heat source of low temperature.

Aomi, H.; Enjo, N.

1980-11-11T23:59:59.000Z

302

Disorder Driven Roughening Transitions of Elastic Manifolds and Periodic Elastic Media  

E-Print Network (OSTI)

Abstract. The simultaneous effect of both disorder and crystal-lattice pinning on the equilibrium behavior of oriented elastic objects is studied using scaling arguments and a functional renormalization group technique. Our analysis applies to elastic manifolds, e.g., interfaces, as well as to periodic elastic media, e.g., charge-density waves or flux-line lattices. The competition between both pinning mechanisms leads to a continuous, disorder driven roughening transition between a flat state where the mean relative displacement saturates on large scales and a rough state with diverging relative displacement. The transition can be approached by changing the impurity concentration or, indirectly, by tuning the temperature since the pinning strengths of the random and crystal potential have in general a different temperature dependence. For D dimensional elastic manifolds interacting with either random-field or random-bond disorder a transition exists for 2 roughening transition exists only if the ratio p of the periodicities of the medium and the crystal lattice exceeds the critical value pc = 6/? ? ?. For p < pc the medium is always flat. Critical exponents are calculated in a double expansion in = p2 /p2 c ? 1 and ? = 4 ? D and fulfill the scaling relations of random field models. 1

unknown authors

2008-01-01T23:59:59.000Z

303

Global dynamics and inflationary center manifold and slow-roll approximants  

E-Print Network (OSTI)

We consider the familiar problem of a minimally coupled scalar field with quadratic potential in flat Friedmann-Lema\\^itre-Robertson-Walker cosmology to illustrate a number of techniques and tools, which can be applied to a wide range of scalar field potentials and problems in e.g. modified gravity. We present a global dynamical systems description that yields a global understanding of the solution space, including asymptotic features. We introduce dynamical systems techniques such as center manifold expansions and use Pad\\'e approximants to obtain improved approximations for the `attractor solution' at early times. We also show that future asymptotic behavior is associated with a limit cycle, which shows that self-similarity is asymptotically broken toward the future, and give approximative expressions for this behavior. We then combine these results to obtain global approximations for the attractor solution, which, e.g., might be used in the context of global measures. In addition we elucidate the connection between slow-roll based approximations and the attractor solution, and compare these approximations with the center manifold based approximants.

Artur Alho; Claes Uggla

2014-06-02T23:59:59.000Z

304

Average values and dispersion (in parentheses)  

NLE Websites -- All DOE Office Websites (Extended Search)

Average values and dispersion (in parentheses) Average values and dispersion (in parentheses) Base-pair Parameters --------------------------------------------------------------------------------------- Shear Stretch Stagger Buckle Propeller Opening 3DNA A 0.01(0.23) -0.18(0.10) 0.02(0.25) -0.13(7.77) -11.79(4.14) 0.57(2.80) B 0.00(0.21) -0.15(0.12) 0.09(0.19) 0.53(6.74) -11.35(5.26) 0.63(3.05) CEHS A 0.01(0.23) -0.18(0.10) 0.02(0.25) -0.13(7.75) -11.82(4.14) 0.56(2.78) B 0.00(0.21) -0.14(0.12) 0.09(0.19) 0.53(6.73) -11.37(5.27) 0.62(3.03) CompDNA A 0.01(0.23) -0.18(0.10) 0.02(0.25) -0.12(7.70) -11.81(4.14) 0.56(2.79) B 0.00(0.21) -0.15(0.12) 0.09(0.19) 0.53(6.70) -11.37(5.26) 0.62(3.03) Curves A 0.01(0.23) -0.18(0.10) 0.02(0.25) -0.13(7.85) -11.76(4.12) 0.57(2.80)

305

Rovibrational dynamics of the strontium molecule in the A1u+, c3u, and a3u+ manifold from state-of-the-art ab initio calculations  

E-Print Network (OSTI)

Rovibrational dynamics of the strontium molecule in the A1u+, c3u, and a3u+ manifold from state OF CHEMICAL PHYSICS 136, 194306 (2012) Rovibrational dynamics of the strontium molecule in the A 1 + u , c3 u for the electronic states in the A 1 + u , c3 u, and a 3 + u manifold of the strontium dimer, the spin

Koch, Christiane

306

Inverse Fluid Convection Problems in Enclosures  

E-Print Network (OSTI)

Efficiency, security, and reliability of industrial and domestic processes essentially depend on the deep understanding of their actual processes of fluid flow and heat transfer. Actual processes of fluid flow control and ...

Zhao, Fu-Yun

2012-01-01T23:59:59.000Z

307

CRITICALITY CURVES FOR PLUTONIUM HYDRAULIC FLUID MIXTURES  

SciTech Connect

This Calculation Note performs and documents MCNP criticality calculations for plutonium (100% {sup 239}Pu) hydraulic fluid mixtures. Spherical geometry was used for these generalized criticality safety calculations and three geometries of neutron reflection are: {sm_bullet}bare, {sm_bullet}1 inch of hydraulic fluid, or {sm_bullet}12 inches of hydraulic fluid. This document shows the critical volume and critical mass for various concentrations of plutonium in hydraulic fluid. Between 1 and 2 gallons of hydraulic fluid were discovered in the bottom of HA-23S. This HA-23S hydraulic fluid was reported by engineering to be Fyrquel 220. The hydraulic fluid in GLovebox HA-23S is Fyrquel 220 which contains phosphorus. Critical spherical geometry in air is calculated with 0 in., 1 in., or 12 inches hydraulic fluid reflection.

WITTEKIND WD

2007-10-03T23:59:59.000Z

308

Engine with a solid working fluid  

Science Journals Connector (OSTI)

... fluids: the fluid may be steam, petrol vapour/air mixture or air (in the Stirling engine), but all depend on cycles involving simultaneous changes of temperature and pressure. Now ...

Robert W. Cahn

1975-05-22T23:59:59.000Z

309

Fluid sampling system for a nuclear reactor  

DOE Patents (OSTI)

A system of extracting fluid samples, either liquid or gas, from the interior of a nuclear reactor containment utilizes a jet pump. To extract the sample fluid, a nonradioactive motive fluid is forced through the inlet and discharge ports of a jet pump located outside the containment, creating a suction that draws the sample fluid from the containment through a sample conduit connected to the pump suction port. The mixture of motive fluid and sample fluid is discharged through a return conduit to the interior of the containment. The jet pump and means for removing a portion of the sample fluid from the sample conduit can be located in a shielded sample grab station located next to the containment. A non-nuclear grade active pump can be located outside the grab sampling station and the containment to pump the nonradioactive motive fluid through the jet pump.

Lau, Louis K. (Monroeville, PA); Alper, Naum I. (Monroeville, PA)

1994-01-01T23:59:59.000Z

310

Specialized Materials and Fluids and Power Plants  

Energy.gov (U.S. Department of Energy (DOE))

Below are the project presentations and respective peer review results for Specialized Materials and Fluids and Power Plants.

311

Supercritical Fluid Attachment of Palladium Nanoparticles on...  

NLE Websites -- All DOE Office Websites (Extended Search)

Attachment of Palladium Nanoparticles on Aligned Carbon Nanotubes. Supercritical Fluid Attachment of Palladium Nanoparticles on Aligned Carbon Nanotubes. Abstract: Nanocomposite...

312

Fluid Interface Reactions, Structures and Transport  

NLE Websites -- All DOE Office Websites (Extended Search)

fluid by local bond relaxation, charge redistribution, dissolution, precipitation, sorption and porosity developmentdestruction. Heretofore, interfaces have been described...

313

2014 GRADUATE STUDIES ENVIRONMENTAL FLUID MECHANICS  

E-Print Network (OSTI)

for Civil and Environmental Engineers · Stochastic Hydrology · Water Resources Management · Fluid Mechanics2014 GRADUATE STUDIES ENVIRONMENTAL FLUID MECHANICS AND WATER RESOURCES ENGINEERING RESEARCH AREAS SELECTED COURSES FACILITIES The Environmental Fluid Mechanics and Water Resources program at the Georgia

Wang, Yuhang

314

Preparation of natural brucite nanofibers by the dispersion method  

Science Journals Connector (OSTI)

The preparation of natural brucite nanofibers through dispersion by the wet process is described. The test results indicate that brucite fibers can be well dispersed by using sodium dioctyl sulfosuccinate (OT) as the dispersant at a dispersant/fiber mass ratio of 0.15:1, dispersing for 30 min at a water/solid mass ratio of 20:1. The prepared nanofibers were characterized with X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). It is shown that the prepared single brucite nanofiber is around 30 nm in diameter and the talus of the nonsingle brucite nanofibers is about 50-150 nm in diameter. Natural brucite mineral fibers were treated by the dispersion method to obtain nanomaterials. These fibers have significant advantages over artificial nanofibers both in yield and in cost.

Li Xu; Wen Ni; Wenping Li; Xingde Liu; Hailong Yang; Xiaoguang Yang

2008-01-01T23:59:59.000Z

315

Modeling and Algorithmic Approaches to Constitutively-Complex, Micro-structured Fluids  

SciTech Connect

The team for this Project made significant progress on modeling and algorithmic approaches to hydrodynamics of fluids with complex microstructure. Our advances are broken down into modeling and algorithmic approaches. In experiments a driven magnetic bead in a complex fluid accelerates out of the Stokes regime and settles into another apparent linear response regime. The modeling explains the take-off as a deformation of entanglements, and the longtime behavior is a nonlinear, far-from-equilibrium property. Furthermore, the model has predictive value, as we can tune microstructural properties relative to the magnetic force applied to the bead to exhibit all possible behaviors. Wave-theoretic probes of complex fluids have been extended in two significant directions, to small volumes and the nonlinear regime. Heterogeneous stress and strain features that lie beyond experimental capability were studied. It was shown that nonlinear penetration of boundary stress in confined viscoelastic fluids is not monotone, indicating the possibility of interlacing layers of linear and nonlinear behavior, and thus layers of variable viscosity. Models, algorithms, and codes were developed and simulations performed leading to phase diagrams of nanorod dispersion hydrodynamics in parallel shear cells and confined cavities representative of film and membrane processing conditions. Hydrodynamic codes for polymeric fluids are extended to include coupling between microscopic and macroscopic models, and to the strongly nonlinear regime.

Forest, Mark Gregory [University of North Carolina at Chapel Hill] [University of North Carolina at Chapel Hill

2014-05-06T23:59:59.000Z

316

Hierarchically Ordered Cadmium Sulfide Nanowires Dispersed in Aqueous Solution  

Science Journals Connector (OSTI)

The paper reports on the preparation, characterization, and dispersion of cadmium sulfide (CdS) nanowires using ordered mesoporous silica, SBA-15, as a template. A homogeneous and stable dispersion of hierarchically ordered CdS nanowires in water ...This work demonstrates the formation of cadmium sulfide (CdS) nanowires. These nanowires are templated by mesoporous SBA-15 and their connectivity is tuned by the number of nanoconnectors (templated by micropores). They form stable dispersions in aqueous sodium dodecyl sulfate (SDS) solutions.

Rajagopalan Thiruvengadathan; Oren Regev

2005-05-17T23:59:59.000Z

317

Atmospheric Dispersion Modeling in Safety Analyses; GENII  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Workshop to Discuss Issues Regarding Deposition Workshop to Discuss Issues Regarding Deposition Velocity June 5-6, 2012 Jeremy Rishel Bruce Napier Atmospheric Dispersion Modeling in Safety Analyses: GENII Today's Presentation.... Will provide a high-level overview of the GENII codes. Will cover basic aspects of GENII's acute atmospheric transport model. Will review the GENII deposition model that is used to estimate the deposition velocity used in plume depletion. 2 GENII Development History 1988 - GENII V1 released ICRP-26/30/48 dosimetry 1990 - GENII V1.485 stabilized Current DOE Toolbox Version 1992 - GENII-S stochastic version 2004 - GENII V2 ICRP-72 age-dependent dosimetry Federal Guidance Report 13 risk factors

318

Dispersion compensation in chirped pulse amplification systems  

DOE Patents (OSTI)

A chirped pulse amplification system includes a laser source providing an input laser pulse along an optical path. The input laser pulse is characterized by a first temporal duration. The system also includes a multi-pass pulse stretcher disposed along the optical path. The multi-pass pulse stretcher includes a first set of mirrors operable to receive input light in a first plane and output light in a second plane parallel to the first plane and a first diffraction grating. The pulse stretcher also includes a second set of mirrors operable to receive light diffracted from the first diffraction grating and a second diffraction grating. The pulse stretcher further includes a reflective element operable to reflect light diffracted from the second diffraction grating. The system further includes an amplifier, a pulse compressor, and a passive dispersion compensator disposed along the optical path.

Bayramian, Andrew James; Molander, William A.

2014-07-15T23:59:59.000Z

319

Electromagnetic waves with nonlinear dispersion law  

E-Print Network (OSTI)

Last year physicists in Europe have measured the velocity of the neutrinos particles. They found the neutrinos moving faster than the speed of light in vacuum. This result means that Einstein's relativity principle and its consequences in modern physics need a global additional renovation. In present paper the part of this problem is considered in terms of basic Maxwell's method only. By means of introduction a diffusion like displacement current the new super wave equation was derived, which permits of its solution be described the electromagnetic waves moving some faster than the conventional speed of light in vacuum especially in a gamma ray of a very short wave length region. The unique properties of these waves are that they undergo nonlinear dispersion law, uppermost limit of which is restricted. Discussion of further experimental problems and a number of estimations are given for the macro physic super wave equations also.

Pavel Mednis

2012-02-08T23:59:59.000Z

320

Radiological Dispersion Devices and Basic Radiation Science  

Science Journals Connector (OSTI)

Introductory physics courses present the basic concepts of radioactivity and an overview of nuclear physics that emphasizes the basic decay relationship and the various types of emitted radiation. Although this presentation provides insight into radiological science it often fails to interest students to explore these concepts in a more rigorous manner. One reason for limited student interest is the failure to link the discussion to topics of current interest. The author has found that presenting this material with a link to radiological dispersion devices (RDDs) or dirty bombs and their associated health effects provides added motivation for students. The events of Sept. 11 2001 and periodic media focus on RDDs heighten student interest from both a scientific curiosity as well as a personal protection perspective. This article presents a framework for a more interesting discussion of the basics of radiation science and their associated health effects. The presentation can be integrated with existing radioactivitylectures or added as a supplementary or enrichment activity.

Joseph John Bevelacqua

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Validation of a Fast-Fluid-Dynamics Model for Predicting Distribution of Particles with Low Stokes Number  

SciTech Connect

To design a healthy indoor environment, it is important to study airborne particle distribution indoors. As an intermediate model between multizone models and computational fluid dynamics (CFD), a fast fluid dynamics (FFD) model can be used to provide temporal and spatial information of particle dispersion in real time. This study evaluated the accuracy of the FFD for predicting transportation of particles with low Stokes number in a duct and in a room with mixed convection. The evaluation was to compare the numerical results calculated by the FFD with the corresponding experimental data and the results obtained by the CFD. The comparison showed that the FFD could capture major pattern of particle dispersion, which is missed in models with well-mixed assumptions. Although the FFD was less accurate than the CFD partially due to its simplification in numeric schemes, it was 53 times faster than the CFD.

Zuo, Wangda; Chen, Qingyan

2011-06-01T23:59:59.000Z

322

Confined Zone Dispersion Project: A DOE assessment  

SciTech Connect

The goal of the US Department of Energy (DOE) Clean Coal Technology (CCT) program is to furnish the energy marketplace with a number of advanced, more efficient, and environmentally responsible coal utilization technologies through demonstration projects. These projects seek to establish the commercial feasibility of the most promising advanced coal technologies that have developed beyond the proof-of-concept (POC) stage. This document serves as a DOE post-project assessment of the Confined Zone Dispersion Project in CCT Round 3. In 1990, Bechtel Corporation entered into a cooperative agreement to conduct the demonstration project. The Seward Power Station of Pennsylvania Electric Company (now GPU Genco) was the host site. DOE funded 43 percent of the total project cost of $12,173,000. The project was started in June 1990 and was scheduled to be completed in June 1993. As a result of various operating problems, the schedule was extended into 1994 without additional cost to DOE. Bechtel provided the additional financing and GPU Genco provided electricity, steam, and water to operate the unit. The independent evaluation contained herein is based primarily on information from Bechtel's final technical report (1994) as well as other references cited. Confined Zone Dispersion (CZD) is a flue gas desulfurization (FGD) process that removes sulfur dioxide (SO{sub 2}). A finely atomized slurry of reactive lime, calcium hydroxide or Ca(OH){sub 2} is injected into the flue-gas duct work, between the air preheater and the second-stage ESP. The lime reacts with the SO{sub 2}, forming dry solid reaction products. The downstream ESP captures the 2 reaction products along with the fly ash entrained in the flue gas. The CZD process was demonstrated on Unit 5, a 147-MWe utility unit with two flue gas ducts. One of the ducts was extended to provide the requisite residence time and retrofitted with the CZD lime injection equipment.

NONE

1999-11-30T23:59:59.000Z

323

Synthesis and Evaluation of Wax Dispersant for Diesel  

Science Journals Connector (OSTI)

Synthesis and Evaluation of Wax Dispersant for Diesel ... We can predict that the sensitivity of diesels A and C will be better than that of diesel B. ...

Wangang Zheng; Shujun Wang; Jie Liu; Fanbin Meng; Yanshan Li; Huanqing Ma; Ting Li

2014-02-28T23:59:59.000Z

324

Application of microbicides for the storage protection of mineral dispersions  

Science Journals Connector (OSTI)

The dispersants, usually based today on salts of polyacrylic acid (PAA), represent a rich supply of... Figure 2 Microbial contamination an...

P. Schwarzentruber; P. A. C. Gane

2005-01-01T23:59:59.000Z

325

Chirped Laser Dispersion Spectroscopy with Directly Modulated Quantum Cascade Laser  

Science Journals Connector (OSTI)

A feasibility study of chirped laser dispersion spectroscopy (CLaDS) with utilizing direct modulation of a quantum cascade laser instead of external modulators is presented....

Hangauer, Andreas; Spinner, Georg; Nikodem, Michal; Wysocki, Gerard

326

Dispersion of Cloud Droplet Size Distributions, Cloud Parameterization...  

NLE Websites -- All DOE Office Websites (Extended Search)

Dispersion of Cloud Droplet Size Distributions, Cloud Parameterizations, and Indirect Aerosol Effects P. H. Daum and Y. Liu Brookhaven National Laboratory Upton, New York...

327

Update 4 to: A Dispersion Modeling Analysis of Downwash from...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and maximum loads will not cause or contribute to exceedances of the National Ambient Air Quality Standards (NAAQS). Update 4 to: A Dispersion Modeling Analysis of Downwash...

328

Fluid dynamics kill Wyoming icicle  

SciTech Connect

Control of a blowout in which a portion of the drill collar string was extending through the rotary table and into the derrick was compounded by ice building up on the derrick and substructure. However, the momentum kill procedure proved successful. Topics considered in this paper include oil wells, natural gas wells, sleeves, rotary drills, drilling rigs, fluid mechanics, occupational safety, blowouts, drill pipes, rotary drilling, ice removal, and freezing.

Grace, R.D.

1987-04-01T23:59:59.000Z

329

Computational Fluid Dynamics (CFD) simulations of dilute fluid-particle flows in aerosol concentrators  

E-Print Network (OSTI)

's turbulent dispersion model. A detailed literature survey revealed the inherent technical deficiencies in the model, even for particle dispersion. Based on the results of this study, it was determined that while the code can be used for simulating aerosol...

Hari, Sridhar

2005-02-17T23:59:59.000Z

330

Use of Clays as Drilling Fluids and Filters  

Science Journals Connector (OSTI)

In geotechnical engineering, drilling fluid is a fluid used to drill boreholes into the earth. In drilling rigs, drilling fluids help to do drill for exploration of oil and natural gas. Liquid drilling fluid is o...

Swapna Mukherjee

2013-01-01T23:59:59.000Z

331

Quantitative characterization of the water trimer torsional manifold by terahertz laser spectroscopy and theoretical analysis. II. ,,H2O...3  

E-Print Network (OSTI)

Quantitative characterization of the water trimer torsional manifold by terahertz laserLaughlin,c) Christy J. Keoshian, Ernest Michael, Jeff D. Cruzan,d) and Richard J. Saykallye) Department of Chemistry, University of California, Berkeley, California 94720 Ad van der Avoirdf) Institute of Theoretical Chemistry

Cohen, Ronald C.

332

Motion Tasks for Robot Manipulators on Embedded 2-D Manifolds Xanthi Papageorgiou, Savvas G. Loizou and Kostas J. Kyriakopoulos  

E-Print Network (OSTI)

including robotic surface painting, surface cleaning, surface inspection, etc. Our main motivation comesMotion Tasks for Robot Manipulators on Embedded 2-D Manifolds Xanthi Papageorgiou, Savvas G. Loizou of a robotic manipulator across the surface of an object in the workspace. Three typical tasks are considered

Loizou, Savvas G.

333

Resume of definitions of "tangent vector" Let M be a manifold, m M, and X = (X1  

E-Print Network (OSTI)

Resum´e of definitions of "tangent vector" Let M be a manifold, m M, and X = (X1 , · · ·Xd ) : U Joel Feldman. 2008. All rights reserved. September 30, 2008 Resum´e of definitions of "tangent vector rights reserved. September 30, 2008 Resum´e of definitions of "tangent vector" 2 #12;

Feldman, Joel

334

Different approximations of shallow fluid flow over an obstacle  

SciTech Connect

Three different sets of shallow water equations, representing different levels of approximation are considered. The numerical solutions of these different equations for flow past bottom topography in several different flow regimes are compared. For several cases the full Euler solutions are computed as a reference, allowing the assessment of the relative accuracies of the different approximations. Further, the differences between the dispersive shallow water (DSW) solutions and those of the highly simplified, hyperbolic shallow water (SW) equations is studied as a guide to determining what level of approximation is required for a particular flow. First, the Green-Naghdi (GN) equations are derived as a vertically-integrated rational approximation of the Euler equations, and then the generalized Boussinesq (gB) equations are obtained under the further assumption of weak nonlinearity. A series of calculations, each assuming different values of a set of parameters{emdash}undisturbed upstream Froude number, and the height and width of the obstacle, are then presented and discussed. In almost all regions of the parameter space, the SW and DSW theories yield different results; it is only when the flows are entirely subcritical or entirely supercritical and when the obstacles are very wide compared to the depth of the fluid that the SW and DSW theories are in qualitative and quantitative agreement. It is also found that while the gB solutions are accurate only for small bottom topographies (less than 20{percent} of the undisturbed fluid depth), the GN solutions are accurate for much larger topographies (up to 65{percent} of the undisturbed fluid depth). The limitation of the gB approximation to small topographies is primarily due to the generation of large amplitude upstream propagating solitary waves at transcritical Froude numbers, and is consistent with previous analysis. (Abstract Truncated)

Nadiga, B.T.; Margolin, L.G. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Smolarkiewicz, P.K. [National Center for Atmospheric Research, Boulder, Colorado 80307 (United States)] [National Center for Atmospheric Research, Boulder, Colorado 80307 (United States)

1996-08-01T23:59:59.000Z

335

Fluid Inclusion Analysis | Open Energy Information  

Open Energy Info (EERE)

Fluid Inclusion Analysis Fluid Inclusion Analysis Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Fluid Inclusion Analysis Details Activities (20) Areas (11) Regions (1) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Fluid Lab Analysis Parent Exploration Technique: Fluid Lab Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Fluid composition at a point in time and space Thermal: The minimum temperature of fluid inclusion formation Cost Information Low-End Estimate (USD): 17.571,757 centUSD 0.0176 kUSD 1.757e-5 MUSD 1.757e-8 TUSD / sample Median Estimate (USD): 17.571,757 centUSD 0.0176 kUSD 1.757e-5 MUSD 1.757e-8 TUSD / sample High-End Estimate (USD): 26.782,678 centUSD

336

Hydrostatic bearings for a turbine fluid flow metering device  

DOE Patents (OSTI)

A rotor assembly fluid metering device has been improved by development of a hydrostatic bearing fluid system which provides bearing fluid at a common pressure to rotor assembly bearing surfaces. The bearing fluid distribution system produces a uniform film of fluid between bearing surfaces and allows rapid replacement of bearing fluid between bearing surfaces, thereby minimizing bearing wear and corrosion. 3 figs.

Fincke, J.R.

1982-05-04T23:59:59.000Z

337

Direct coal liquefaction at HTI using dispersed slurry catalyst  

SciTech Connect

The US Department of Energy (DOE) Direct Coal Liquefaction effort, in which Hydrocarbon Technologies, Inc. (HTI) is a major participant, is an integral part of the effort to meet the US National Energy Strategy goal of relying more on indigenous sources of energy. This is also very applicable to the China situation where there is a need to use the abundant coal, and organic waste resources present in China to produce cost-effective fuels that will meet environmental goals of high efficiency with neutral consequences on air, water and ground status. Located at HTI`s Research and Development Center in Lawrenceville, New Jersey are several pilot scale continuous flow operating units to study, develop and demonstrate direct coal liquefaction and hydrocracking. These units include two two-stage, 50 Kg/day process evaluation units, one 3/4 ton/day process confirmation unit and a 5 ton/day process development unit. Each of these units are adaptable for operation as fluidized (ebullated) beds or fully backmixed slurry catalyst reactor units. These units are completely integrated to provide feed preparation and handling, preheating, reaction, vapor/liquid separation, on-line hydrotreating, product fractionation, bottoms recycling and solid removal. These units have not only been used in the processing of coal, but also in the upgrading of heavy oil, tar sand bitumen, shale oil, waste tires, plastics, lignin and other organic municipal and industrial wastes. HTI has developed an advanced direct liquefaction process, HTI Coal Process, that produces clean transportation fuels and chemicals at a US cost of less than $30/bbl., equivalent crude oil price, at a grass roots facility. This process is based on the use of an HTI iron based catalyst, GelCat, with backmixed reactors, a close-coupled hydrotreater and interstage gas/liquid separation. Coal conversion, distillate yields and product qualities are comparable to that seen with a supported catalyst reactor system. The process is continuous, isothermal and free of solids accumulation with all coal ranks tested. Under the auspices of the US DOE, HTI has developed multi-stage liquefaction processes based on both supported and dispersed catalysts. The supported catalyst configuration involves the use of a three-phase ebullated bed reactor in which the supported catalyst is maintained at a random (fluidization) stage by re-circulating a relatively large quantity of catalyst-gas-free process fluid collected from the top of the reactor.

Lee, L.K.; Comolli, A.G.; Popper, G.; Zhou, P.Z. [Hydrocarbon Technologies, Inc., Lawrenceville, NJ (United States)

1997-12-31T23:59:59.000Z

338

Nonperturbative theory for the dispersion self-energy of atoms  

Science Journals Connector (OSTI)

We go beyond the approximate series expansions used in the dispersion theory of finite-size atoms. We demonstrate that a correct, and nonperturbative, theory dramatically alters the dispersion self-energies of atoms. The nonperturbed theory gives as much as 100% corrections compared to the traditional series-expanded theory for the smaller noble gas atoms.

Priyadarshini Thiyam; C. Persson; I. Brevik; Bo E. Sernelius; Mathias Bostrm

2014-11-14T23:59:59.000Z

339

Synthesis of dispersed surface waves by means of Fourier transform  

Science Journals Connector (OSTI)

...50T 60r Angular velocity in degree/~usec Fig. 5. Dispersion curve obtained by...I .01 . I .5 Frequency in cycle/,usec Fig. 6. Dispersion curve obtained by...of Fourier transform. ~ - ~ - - ~ SO ~usec O0 i -" i ";'".-.-i , , I...

Yasuo Sat

340

Phonon dispersion of carbon nanotubes J. Maultzscha,*, S. Reicha  

E-Print Network (OSTI)

Phonon dispersion of carbon nanotubes J. Maultzscha,*, S. Reicha , C. Thomsena , E. Dobardz the phonon dispersion relations of single-wall carbon nanotubes calculated within a force-constants approach 6 and 12 cm21 independent of the tube diameter. The order of the high-energy modes at the G

Nabben, Reinhard

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Demonstration of Electrical Dispersion Compensation of Single Sideband Optical Transmission  

E-Print Network (OSTI)

Demonstration of Electrical Dispersion Compensation of Single Sideband Optical Transmission P. M describe a demonstration of electrical chromatic dispersion compensation of 10 Gb/s single sideband optical signals. Eye-opening and bit error rates of less than 10-10 were achieved after compensation of -2040 ps

Haddadi, Hamed

342

A study of micro fiber dispersion using digital image analysis  

E-Print Network (OSTI)

of this dissertation is to investigate the use of texture analysis as a tool to micro fiber dispersion measurement. Micro fiber dispersion can be found in many applications such as in paper and industry powder engineering. Three cases related to micro fiber...

Hendrarsakti, Jooned

2004-11-15T23:59:59.000Z

343

Multiple source/multiple target fluid transfer apparatus  

DOE Patents (OSTI)

A fluid transfer apparatus includes: (a) a plurality of orifices for connection with fluid sources; (b) a plurality of orifices for connection with fluid targets; (c) a set of fluid source conduits and fluid target conduits associated with the orifices; (d) a pump fluidically interposed between the source and target conduits to transfer fluid there between; (e) a purge gas conduit in fluid communication with the fluid source conduits, fluid target conduits and pump to receive and pass a purge gas under pressure; (f) a solvent conduit in fluid communication with the fluid source conduits, fluid target conduits and pump to receive and pass solvent, the solvent conduit including a solvent valve; (g) pump control means for controlling operation of the pump; (h) purge gas valve control means for controlling operation of the purge gas valve to selectively impart flow of purge gas to the fluid source conduits, fluid target conduits and pump; (i) solvent valve control means for controlling operation of the solvent valve to selectively impart flow of solvent to the fluid source conduits, fluid target conduits and pump; and (j) source and target valve control means for controlling operation of the fluid source conduit valves and the fluid target conduit valves to selectively impart passage of fluid between a selected one of the fluid source conduits and a selected one of the fluid target conduits through the pump and to enable passage of solvent or purge gas through selected fluid source conduits and selected fluid target conduits. 6 figs.

Turner, T.D.

1997-08-26T23:59:59.000Z

344

Immersible solar heater for fluids  

DOE Patents (OSTI)

An immersible solar heater comprising a light-absorbing panel attached to a frame for absorbing heat energy from the light and transferring the absorbed heat energy directly to the fluid in which the heater is immersed. The heater can be used to heat a swimming pool, for example, and is held in position and at a preselected angle by a system of floats, weights and tethers so that the panel can operate efficiently. A skid can be used in one embodiment to prevent lateral movement of the heater along the bottom of the pool. Alternative embodiments include different arrangements of the weights, floats and tethers and methods for making the heater.

Kronberg, James W. (Aiken, SC)

1995-01-01T23:59:59.000Z

345

Electroacoustics of Particles Dispersed in Polymer Gel  

SciTech Connect

This study examines the acoustic electrophoresis of particles dispersed in polymer hydrogels, with the particle size either less than or greater than the gel mesh size. When the particles are smaller than the gel mesh size, their acoustic vibration is resisted by only the background water medium, and the measured dynamic electrophoretic mobility, ?d (obtained in terms of colloid vibration current, CVI), is the same as in water. For the case of particles larger than the gel mesh size, ?d is decreased due to trapping, and the net decrease depends on the viscoelastic properties of the gel. The gel mesh size was varied by varying its crosslink density, the latter being characterized as the storage modulus, G. The dependence of mobility on G, for systems of a given particle size, and on particle size, for gels of a given G, are investigated. The measured mobility remains constant as G is increased (i.e., mesh size is decreased) up to a value of approximately 300 Pa, beyond which it decreases. In the second set of measurements, the trapped particle size was increased in a gel medium of constant mesh size, with G approximately 100 Pa. In this case, the measured ?d is found to be effectively constant over the particle size range studied (14-120 nm), i.e., it is independent of the degree of trapping as expressed by the ratio of the particle size to the mesh size.

Bhosale, Prasad S.; Chun, Jaehun; Berg, John C.

2011-06-27T23:59:59.000Z

346

Two-point derivative dispersion relations  

E-Print Network (OSTI)

A new derivation is given for the representation, under certain conditions, of the integral dispersion relations of scattering theory through local forms. The resulting expressions have been obtained through an independent procedure to construct the real part, and consist of new mathematical structures of double infinite summations of derivatives. In this new form the derivatives are calculated at the generic value of the energy $E$ and separately at the reference point $E=m$ that is the lower limit of the integration. This new form may be more interesting in certain circumstances and directly shows the origin of the difficulties in convergence that were present in the old truncated forms called standard-DDR. For all cases in which the reductions of the double to single sums were obtained in our previous work, leading to explicit demonstration of convergence, these new expressions are seen to be identical to the previous ones. We present, as a glossary, the most simplified explicit results for the DDR's in the cases of imaginary amplitudes of forms $(E/m)^\\lambda[\\ln (E/m)]^n$, that cover the cases of practical interest in particle physics phenomenology at high energies. We explicitly study the expressions for the cases with $\\lambda$ negative odd integers, that require identification of cancelation of singularities, and provide the corresponding final results.

Erasmo Ferreira; Javier Sesma

2014-03-24T23:59:59.000Z

347

System and method for bidirectional flow and controlling fluid flow in a conduit  

DOE Patents (OSTI)

A system for measuring bidirectional flow, including backflow, of fluid in a conduit is disclosed. The system utilizes a structural mechanism to create a pressure differential in the conduit. Pressure sensors are positioned upstream from the mechanism, at the mechanism, and downstream from the mechanism. Data from the pressure sensors are transmitted to a microprocessor or computer, and pressure differential detected between the pressure sensors is then used to calculate the backflow. Control signals may then be generated by the microprocessor or computer to shut off valves located in the conduit, upon the occurrence of backflow, or to control flow, total material dispersed, etc. in the conduit. 3 figs.

Ortiz, M.G.

1999-03-23T23:59:59.000Z

348

Analysis of fluid inclusions in halite  

SciTech Connect

A technique has been developed to drill into fluid inclusions in halite, to extract the inclusions fluids, and to determine the concentration of all of the major and some of the minor constituents in these fluids. The minimum diameter of usable fluid inclusions is ca. 250 ..mu..m. After dilution, the fluids are analyzed by ion chromatography and coulometry. Uncertainties in the concentration of the major cations and anions is on the order of 4%. The analytical scheme provides much more precise analyses of inclusion fluids than have been available to date. The analyses are a useful starting point for reconstructing the composition of the sea water from which the evaporite brines evolved.

Lazar, B.; Holland, H.D.

1988-02-01T23:59:59.000Z

349

Viscous potential flow analysis of electrified miscible finitely conducting fluid through porous media  

SciTech Connect

In this work, a viscous potential flow analysis is used to investigate capillary surface waves between two horizontal finite fluid layers. The two layers have finite conductivities and admit mass and heat transfer. A general dispersion relation is derived. The presence of finite conductivities together with the dielectric permeabilities makes the horizontal electric field play a dual role in the stability criterion. The phenomenon of negative viscosity is observed. A new growth rate parameter, depending on the kinematical viscosity of the lower fluid layer, is found and has a stabilizing effect on the unstable modes. The growth rates and neutral stability curve are given and applied to air-water interface. The effects of various parameters are discussed for the Kelvin-Helmholtz and the Rayleigh-Taylor instabilities.

Obied Allah, M. H. [Department of Mathematics, Faculty of Science, Assiut University, Assiut (Egypt)

2013-04-15T23:59:59.000Z

350

Modelling long-distance seed dispersal in heterogeneous landscapes.  

SciTech Connect

1. Long-distance seed dispersal is difficult to measure, yet key to understanding plant population dynamics and community composition. 2. We used a spatially explicit model to predict the distribution of seeds dispersed long distances by birds into habitat patches of different shapes. All patches were the same type of habitat and size, but varied in shape. They occurred in eight experimental landscapes, each with five patches of four different shapes, 150 m apart in a matrix of mature forest. The model was parameterized with smallscale movement data collected from field observations of birds. In a previous study we validated the model by testing its predictions against observed patterns of seed dispersal in real landscapes with the same types and spatial configuration of patches as in the model. 3. Here we apply the model more broadly, examining how patch shape influences the probability of seed deposition by birds into patches, how dispersal kernels (distributions of dispersal distances) vary with patch shape and starting location, and how movement of seeds between patches is affected by patch shape. 4. The model predicts that patches with corridors or other narrow extensions receive higher numbers of seeds than patches without corridors or extensions. This pattern is explained by edgefollowing behaviour of birds. Dispersal distances are generally shorter in heterogeneous landscapes (containing patchy habitat) than in homogeneous landscapes, suggesting that patches divert the movement of seed dispersers, holding them long enough to increase the probability of seed defecation in the patches. Dispersal kernels for seeds in homogeneous landscapes were smooth, whereas those in heterogenous landscapes were irregular. In both cases, long-distance (> 150 m) dispersal was surprisingly common, usually comprising approximately 50% of all dispersal events. 5. Synthesis . Landscape heterogeneity has a large influence on patterns of long-distance seed dispersal. Our results suggest that long-distance dispersal events can be predicted using spatially explicit modelling to scale-up local movements, placing them in a landscape context. Similar techniques are commonly used by landscape ecologists to model other types of movement; they offer much promise to the study of seed dispersal.

Levey, Douglas, J.; Tewlsbury, Joshua, J.; Bolker, Benjamin, M.

2008-01-01T23:59:59.000Z

351

Apparatus for unloading pressurized fluid  

DOE Patents (OSTI)

An apparatus is described for unloading fluid, preferably pressurized gas, from containers in a controlled manner that protects the immediate area from exposure to the container contents. The device consists of an unloading housing, which is enclosed within at least one protective structure, for receiving the dispensed contents of the steel container, and a laser light source, located external to the protective structure, for opening the steel container instantaneously. The neck or stem of the fluid container is placed within the sealed interior environment of the unloading housing. The laser light passes through both the protective structure and the unloading housing to instantaneously pierce a small hole within the stem of the container. Both the protective structure and the unloading housing are specially designed to allow laser light passage without compromising the light's energy level. Also, the unloading housing allows controlled flow of the gas once it has been dispensed from the container. The external light source permits remote operation of the unloading device. 2 figures.

Rehberger, K.M.

1994-01-04T23:59:59.000Z

352

System and method for filling a plurality of isolated vehicle fluid circuits through a common fluid fill port  

SciTech Connect

A vehicle having multiple isolated fluid circuits configured to be filled through a common fill port includes a first fluid circuit disposed within the vehicle, the first fluid circuit having a first fill port, a second fluid circuit disposed within the vehicle, and a conduit defining a fluid passageway between the first fluid circuit and second fluid circuit, the conduit including a valve. The valve is configured such that the first and second fluid circuits are fluidly coupled via the passageway when the valve is open, and are fluidly isolated when the valve is closed.

Sullivan, Scott C; Fansler, Douglas

2014-10-14T23:59:59.000Z

353

Studies of complexity in fluid systems  

SciTech Connect

This is the final report of Grant DE-FG02-92ER25119, ''Studies of Complexity in Fluids'', we have investigated turbulence, flow in granular materials, singularities in evolution of fluid surfaces and selective withdrawal fluid flows. We have studied numerical methods for dealing with complex phenomena, and done simulations on the formation of river networks. We have also studied contact-line deposition that occurs in a drying drop.

Nagel, Sidney R.

2000-06-12T23:59:59.000Z

354

Vibratory pumping of a free fluid stream  

DOE Patents (OSTI)

A vibratory fluid pump having a force generator for generating asymmetric periodic waves or oscillations connected to one end of one or more fluid conveyance means, such as filaments. The opposite ends of the filaments are connected to springs. Fluid introduced onto the filaments will traverse along the filaments according to the magnitude of the positive and negative excursions of the periodic waves or oscillations, and can be recovered from the filaments.

Merrigan, Michael A. (Santa Cruz, NM); Woloshun, Keith A. (Los Alamos, NM)

1990-01-01T23:59:59.000Z

355

Vibratory pumping of a free fluid stream  

DOE Patents (OSTI)

A vibratory fluid pump is described having a force generator for generating asymmetric periodic waves or oscillations connected to one end of one or more fluid conveyance means, such as filaments. The opposite ends of the filaments are connected to springs. Fluid introduced onto the filaments will traverse along the filaments according to the magnitude of the positive and negative excursions of the periodic waves or oscillations, and can be recovered from the filaments. 3 figs.

Merrigan, M.A.; Woloshun, K.A.

1990-11-13T23:59:59.000Z

356

Hydrostatic bearings for a turbine fluid flow metering device  

DOE Patents (OSTI)

A rotor assembly fluid metering device has been improved by development of a hydrostatic bearing fluid system which provides bearing fluid at a common pressure to rotor assembly bearing surfaces. The bearing fluid distribution system produces a uniform film of fluid distribution system produces a uniform film of fluid between bearing surfaces and allows rapid replacement of bearing fluid between bearing surfaces, thereby minimizing bearing wear and corrosion.

Fincke, J.R.

1980-05-02T23:59:59.000Z

357

Heat Transfer Fluids Containing Nanoparticles | Argonne National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Heat Transfer Fluids Containing Nanoparticles Technology available for licensing: A stable, nonreactive nanofluid that exhibits enhanced heat transfer properties with only a...

358

Sandia National Laboratories: Computational Fluid Dynamics Simulations...  

NLE Websites -- All DOE Office Websites (Extended Search)

Canal, Yakima Washington Sandia Publishes Five Reports on the Environmental Effects of Wave-Energy Converters Computational Fluid Dynamics Simulations Provide Insight for Rotor...

359

DISPLAYING AND INTERPRETING FLUID INCLUSION STRATIGRAPHY ANALYSES...  

Open Energy Info (EERE)

This is the fourth paper in a series on developing fluid inclusion stratigraphy (FIS) as a logging tool for geothermal bore holes. Here we address methods of displaying...

360

Fluid casting of particle-based articles  

DOE Patents (OSTI)

A method for the production of articles made of a particle-based material; e.g., ceramics and sintered metals. In accordance with one aspect of the invention, a thermally settable slurry containing a relatively high concentration of the particles is introduced into an immiscible, heated fluid. The slurry sets or hardens into a shape determined by the physical characteristics of the fluid and the manner of introduction of the slurry into the fluid. For example, the slurry is pulse injected into the fluid to provide spherical articles. The hardened spheres may then be sintered to consolidate the particles and provide a high density product.

Menchhofer, Paul (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Stabilisation of titania pigment particles with anionic polymeric dispersants  

Science Journals Connector (OSTI)

The stabilisation of titania pigment in dry water-based paint films with anionic polymeric dispersants containing carboxylate groups was investigated. The results were compared to those obtained from rheological analysis of titania pigment suspensions. The polymeric dispersants chosen were polyacrylic acid and polyacrylamides copolymer modified with carboxylate groups. AFM and TEM were used to assess the distribution of the titania pigment particles in the surface and bulk, respectively, of the paint films which were then compared to the gloss and surface roughness of these films. In the absence of a dispersant, the pigment distribution in the paint films was not uniform and relatively large pigment aggregates appeared at the surface, resulting in a rough surface and low gloss. However, anionic polymeric dispersants decreased surface roughness and increased the gloss of the dry paint films, with the dispersant concentration considerably enhancing pigment distribution in the paint films. An inverse correlation of paint film gloss with surface roughness was observed. The optimum pigment distribution in the dry state was found at dispersant concentrations much higher than those needed to obtain minimum yield stress in aqueous suspensions. This suggests that in the dry state, electrostatic stabilisation is substantially reduced or possibly absent, therefore a higher dispersant concentration is needed to achieve pigment stabilisation.

Saeed Farrokhpay; Gayle E. Morris; Daniel Fornasiero; Peter Self

2010-01-01T23:59:59.000Z

362

Remarks on the concept of dispersion in a curved linac  

SciTech Connect

A next-generation linear collider is expected to span tens of kilometers in length. For various reasons, it may be desirable to house such an accelerator in a tunnel that follows the earth's curvature rather that in a 'laser-straight' tunnel. One side effect of opting for a curved linac is the introduction of vertical dispersion. In recent years, much work has been dedicated to understand and evaluate the impact of the presence of dispersion on emittance preservation. While performing simulations with our in-house code (CHEF) we observed a discrepancy between the dispersion function it produces and that computed using other codes in use within the accelerator community. Understanding the origin and the meaning of this discrepancy required a re-examination of the meaning of the concept of dispersion in the context of a linac. The object of this note is to document our findings. We establish that the default dispersion algorithm used by CHEF corresponds to a different, and ultimately more appropriate, definition of the dispersion in presence of acceleration. Not surprisingly, a consistent definition of dispersion restores agreement between codes.

Ostiguy, Jean-Francois; /Fermilab

2009-01-01T23:59:59.000Z

363

Particle-fluid heat/mass transfer: Newtonian and non-Newtonian fluids  

Science Journals Connector (OSTI)

A new model based on the boundary layer analysis is developed for particle-fluid heat/mass transfer. The proposed model enables a unified consideration ... results with data for Newtonian and non-Newtonian fluids

Y. Kawase

1992-01-01T23:59:59.000Z

364

Equipment and procedures for fluid flow and wettability tests of geological materials  

SciTech Connect

The Bartlesville Energy Technology Center, US Department of Energy, has developed several unique types of laboratory apparatus: (1) equipment for measurement of petroleum reservoir fluids at simulated subsurface conditions of temperature and pressure, (2) apparatus for saturation of geological cores with liquids, (3) design of a low internal volume pressure relief valve, and (4) apparatus and procedures for the quantitative determination of the relative wetting of oil and water on geologic materials. The fluid flow apparatus operates on the principles of liquid chromatography except for the replacement of the standard chromatographic column by a geologic core sample; it can be operated at an internal pore pressure of 400 atmospheres and 150/sup 0/C. The apparatus can be applied to the measurement of the adsorption characteristics of reservoir fluids such as surfactants, polymers, chemical tracers and biocides; it is also applicable to the determination of relative permeability relationships and miscible and immiscible fluid flow behavior. The apparatus for the saturation of geologic cores is adaptable for simultaneous saturation of several small cores or a single core up to 50 cm in length and 4 cm in diameter. The pressure relief valve has an internal volume less than 0.5 ml and can operate at pressures as high as 500 atmospheres. The apparatus for determination of wettability was constructed by modification of a commercial centrifuge and the procedure is based on the thermodynamic work required for fluid displacement from a porous medium. This paper incorporates the design features and operational procedures of the apparatus in addition to the computer programs for calculation of miscible phase dispersion of reservoir fluids and adsorption characteristics of reservoir chemicals.

Donaldson, E.C.; Kendall, R.F.; Pavelka, E.A.; Crocker, M.E.

1980-05-01T23:59:59.000Z

365

Fluid chemistry and temperatures prior to exploitation at the Las Tres Vrgenes geothermal field, Mexico  

Science Journals Connector (OSTI)

Generation of electricity at the Las Tres Vrgenes (LTV) geothermal field, Mexico, began in 2001. There are currently nine geothermal wells in the field, which has an installed electricity generating capacity of 10MWe. The chemical and temperature conditions prevailing in the field prior to its exploitation have been estimated, including their central tendency and dispersion parameters. These conditions were computed on the basis of: (i) geochemical data on waters from springs and domestic wells, and on geothermal well fluids (waters and gases); most of the sampling took place between 1995 and 1999; (ii) fluid inclusion studies; (iii) geothermometric data; and (iv) static formation temperatures computed using a modified quadratic regression Horner method. Fluid inclusion homogenization temperatures (in the 100290C range) suggest that there is a high-temperature fluid upflow zone near wells LV3 and LV4 in the southern part of the field. Computed average chemical equilibrium temperatures for the geothermal fluids are ?260C, based on the Na/K and SiO2 geothermometers, and ?265C, based on the H2/Ar, and CO2/Ar geothermometers. In general, the fluid inclusion homogenization temperatures are consistent with geothermometric data, as well as with static formation temperatures. Some of the observed differences could be related to well interference effects and different fluid production/sampling depths. The deeper geothermal waters show higher concentrations of Cl, Na, K, B, Ba, but lower concentrations of SO4, Ca, and Mg than the shallower waters. Fluid inclusion salinities are also higher in the deeper rocks. The measured Na/Cl ratios of the geothermal well waters are more or less uniform throughout the field and are very similar to that of seawater, strongly suggesting a seawater component in the fluid of the LTV system. The heat stored in the LTV geothermal system was estimated to be at least 9נ1012MJ, of which some 4נ1011MJ (equivalent to about 148MWe for 30 years of operation, assuming a conversion efficiency of ?35%) might be extracted using wells. These results indicate that the installed capacity at LTV could be safely increased from the current 10MWe.

Surendra P. Verma; Kailasa Pandarinath; Edgar Santoyo; Eduardo Gonzlez-Partida; Ignacio S. Torres-Alvarado; Enrique Tello-Hinojosa

2006-01-01T23:59:59.000Z

366

Laser microfluidics : fluid actuation by light Laser microfluidics: fluid actuation by light  

E-Print Network (OSTI)

Laser microfluidics : fluid actuation by light Laser microfluidics: fluid actuation by light Jean.delville@cpmoh.u-bordeaux1.fr Abstract: The development of microfluidic devices is still hindered by the lack of robust to extend this concept to microfluidic two-phase flows. First, we investigate the destabilization of fluid

Paris-Sud XI, Université de

367

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 31: 345358 (1999)  

E-Print Network (OSTI)

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS Int. J. Numer. Meth. Fluids 31: 345­358 (1999 AND S. ROYc,3 a Engineering Science Program, MAES Department, 316A Perkins Hall, Uni6ersity of Tennessee Corporation, Burr Ridge, IL, USA SUMMARY The quest continues for accurate and efficient computational fluid

Roy, Subrata

368

Immersible solar heater for fluids  

DOE Patents (OSTI)

An immersible solar heater is described comprising a light-absorbing panel attached to a frame for absorbing heat energy from the light and transferring the absorbed heat energy directly to the fluid in which the heater is immersed. The heater can be used to heat a swimming pool, for example, and is held in position and at a preselected angle by a system of floats, weights and tethers so that the panel can operate efficiently. A skid can be used in one embodiment to prevent lateral movement of the heater along the bottom of the pool. Alternative embodiments include different arrangements of the weights, floats and tethers and methods for making the heater.

Hazen, T.C.; Fliermans, C.B.

1994-01-01T23:59:59.000Z

369

Immersible solar heater for fluids  

DOE Patents (OSTI)

An immersible solar heater is described comprising a light-absorbing panel attached to a frame for absorbing heat energy from the light and transferring the absorbed heat energy directly to the fluid in which the heater is immersed. The heater can be used to heat a swimming pool, for example, and is held in position and at a preselected angle by a system of floats, weights and tethers so that the panel can operate efficiently. A skid can be used in one embodiment to prevent lateral movement of the heater along the bottom of the pool. Alternative embodiments include different arrangements of the weights, floats and tethers and methods for making the heater. 11 figs.

Kronberg, J.W.

1995-07-11T23:59:59.000Z

370

Invariance properties of boundary sets of open embeddings of manifolds and their application to the abstract boundary  

E-Print Network (OSTI)

The {\\em abstract boundary\\/} (or {\\em {\\em a\\/}-boundary\\/}) of Scott and Szekeres \\cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional, paracompact, connected, Hausdorff, $C^\\infty$-manifold (without a boundary in the usual sense). In general relativity one deals with a {\\em space-% time\\/} $(\\cM,g)$ (a 4-dimensional manifold $\\cM$ with a Lorentzian metric $g$), together with a chosen preferred class of curves in $\\cM$. In this case the {\\em a\\/}-boundary points may represent ``singularities'' or ``points at infinity''. Since the {\\em a\\/}-boundary itself, however, does not depend on the existence of further structure on the manifold such as a Lorentzian metric or connection, it is possible for it to be used in many contexts. In this paper we develop some purely topological properties of abstract boundary sets and abstract boundary points ({\\em a\\/}-boundary points). We prove, amongst other things, that compactness is invariant under boundary set equivalence, and introduce another invariant concept ({\\em isolation\\/}), which encapsulates the notion that a boundary set is ``separated'' from other boundary points of the same embedding. ....... [The abstract continues in paper proper - truncated to fit here.

Christopher J. Fama; Susan M. Scott

1994-06-21T23:59:59.000Z

371

Aeroassisted orbital transfer vehicle guidance performance in the presence of density dispersions  

E-Print Network (OSTI)

Dispersions Analytic Predictor-Corrector AV, Sensitivity to Step Dispersions Analytic Predictor-Corrector DV, Sensitivity to Spike Dispersions Energy Controller AV, Sensitivity to Step Dispersions 42 44 46 49 49 51 53 56 LIST OF FIGURES...-Corrector AV, Sensitivity to a 10000 foot Duration Step Dispersions . AV, Comparison for 0. 20 Magnitude, 10000 foot Duration, Step Dispersion HPC Bank Angle History for -20% Biased 1962 Standard Atmosphere Page 58 67 67 69 71 71 72 73 75 27...

Fitzgerald, Steve Matthew

2012-06-07T23:59:59.000Z

372

Atmospheric Dispersion Model Validation in Low Wind Conditions  

SciTech Connect

Atmospheric plume dispersion models are used for a variety of purposes including emergency planning and response to hazardous material releases, determining force protection actions in the event of a Weapons of Mass Destruction (WMD) attack and for locating sources of pollution. This study provides a review of previous studies that examine the accuracy of atmospheric plume dispersion models for chemical releases. It considers the principles used to derive air dispersion plume models and looks at three specific models currently in use: Aerial Location of Hazardous Atmospheres (ALOHA), Emergency Prediction Information Code (EPIcode) and Second Order Closure Integrated Puff (SCIPUFF). Results from this study indicate over-prediction bias by the EPIcode and SCIPUFF models and under-prediction bias by the ALOHA model. The experiment parameters were for near field dispersion (less than 100 meters) in low wind speed conditions (less than 2 meters per second).

Sawyer, Patrick

2007-11-01T23:59:59.000Z

373

Enhanced Dispersion from Tall Stacks Near Modern Wind Mills  

Science Journals Connector (OSTI)

Dispersion modeling of emissions from tall stacks is often done with regulatory models, based on the Gaussian plume concept. When the plumes of tall stacks are influenced by the turbulence of nearby wind mills, t...

J. J. Erbrink; Luc Verhees

2014-01-01T23:59:59.000Z

374

RELIABILITY OF WIND POWER FROM DISPERSED SITES: A PRELIMINARY ASSESSMENT  

E-Print Network (OSTI)

ON METHODOLOGY: FROM WIND POWER FREQUENCY TO LOSS-OF-LOADJ.P. , "Some Aspects of Wind Power Statistics, " J. of Appl.SCTION Reliability of Wind Power From Dispersed Sites: A Pr

Kahn, E.

2011-01-01T23:59:59.000Z

375

Structural characteristics, dispersion, and modification of fibrous brucite  

Science Journals Connector (OSTI)

Fibrous brucite has very unique structure and physical properties. Brucite fibers were exfoliated into single nanofibers by ... fiber has a consistent morphology, and fibrous brucite is dispersed and modified wit...

Xi Cao; Xiu-yun Chuan

2014-01-01T23:59:59.000Z

376

Nonphotochemical hole burning and dispersive kinetics in amorphous solids.  

E-Print Network (OSTI)

??Results of an extensive study, covering burn intensities in the nW to {dollar}?{dollar}W/cm{dollar}2{dollar} range, of dispersive hole growth kinetics are reported for Oxazine 720 in (more)

Kenney, Michael Joseph

1990-01-01T23:59:59.000Z

377

Ultrasonication technique: a method for dispersing nanoclay in wood adhesives  

Science Journals Connector (OSTI)

The efficiency of ultrasonication technique to disperse nanoclay in polyvinyl acetate (PVA) was examined. A hydrophilic nanoclay was added to PVA, and its effects on bond strength of wood joints were determined. The results of bond strength measured ...

Alireza Kaboorani; Bernard Riedl; Pierre Blanchet

2013-01-01T23:59:59.000Z

378

Dispersion interferometer using modulation amplitudes on LHD (invited)  

SciTech Connect

Since a dispersion interferometer is insensitive to mechanical vibrations, a vibration compensation system is not necessary. The CO{sub 2} laser dispersion interferometer with phase modulations on the Large Helical Device utilizes the new phase extraction method which uses modulation amplitudes and can improve a disadvantage of the original dispersion interferometer: measurement errors caused by variations of detected intensities. The phase variation within 2 10{sup 17} m{sup ?3} is obtained without vibration compensation system. The measured line averaged electron density with the dispersion interferometer shows good agreement with that with the existing far infrared laser interferometer. Fringe jump errors in high density ranging up to 1.5 10{sup 20} m{sup ?3} can be overcome by a sufficient sampling rate of about 100 kHz.

Akiyama, T., E-mail: takiyama@lhd.nifs.ac.jp; Yasuhara, R.; Kawahata, K. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292 (Japan); Okajima, S.; Nakayama, K. [Chubu University, Matsumoto-cho, Kasugai-shi, Aichi 487-8501 (Japan)

2014-11-15T23:59:59.000Z

379

Effects of Oil and Oil Dispersants on the Marine Environment  

Science Journals Connector (OSTI)

13 April 1971 research-article Effects of Oil and Oil Dispersants on the Marine Environment R. G. J. Shelton In the context of marine pollution, the term 'oil' can cover a very wide range of substances and usually...

1971-01-01T23:59:59.000Z

380

Bayesian Network Analysis of Radiological Dispersal Device Acquisitions  

E-Print Network (OSTI)

It remains unlikely that a terrorist organization could produce or procure an actual nuclear weapon. However, the construction of a radiological dispersal device (RDD) from commercially produced radioactive sources and conventional explosives could...

Hundley, Grant Richard

2012-02-14T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

GIS and plume dispersion modeling for population exposure assessment  

E-Print Network (OSTI)

. Traditional methods of dispersion modeling for the permitting of new sources and the monitoring of existing sources have allowed much room for error in terms of the effect of the pollutants on nearby populations (Hardikar, 1995). The capabilities of GIS...

Archer, Jeffrey Keith

2012-06-07T23:59:59.000Z

382

A dynamic model for the Lagrangian stochastic dispersion coefficient  

SciTech Connect

A stochastic sub-grid model is often used to accurately represent particle dispersion in turbulent flows using large eddy simulations. Models of this type have a free parameter, the dispersion coefficient, which is not universal and is strongly grid-dependent. In the present paper, a dynamic model for the evaluation of the coefficient is proposed and validated in decaying homogeneous isotropic turbulence. The grid dependence of the static coefficient is investigated in a turbulent mixing layer and compared to the dynamic model. The dynamic model accurately predicts dispersion statistics and resolves the grid-dependence. Dispersion statistics of the dynamically calculated constant are more accurate than any static coefficient choice for a number of grid spacings. Furthermore, the dynamic model produces less numerical artefacts than a static model and exhibits smaller sensitivity in the results predicted for different particle relaxation times.

Pesmazoglou, I.; Navarro-Martinez, S., E-mail: s.navarro@imperial.ac.uk [Department of Mechanical Engineering, Imperial College, London SW7 2AZ (United Kingdom); Kempf, A. M. [Chair of Fluid Dynamics, Institute for Combustion and Gasdynamics and Center for Computational Sciences and Simulation, Universitt Duisburg-Essen, Duisburg, 47048 (Germany)] [Chair of Fluid Dynamics, Institute for Combustion and Gasdynamics and Center for Computational Sciences and Simulation, Universitt Duisburg-Essen, Duisburg, 47048 (Germany)

2013-12-15T23:59:59.000Z

383

Foam vessel for cryogenic fluid storage  

DOE Patents (OSTI)

Cryogenic storage and separator vessels made of polyolefin foams are disclosed, as are methods of storing and separating cryogenic fluids and fluid mixtures using these vessels. In one embodiment, the polyolefin foams may be cross-linked, closed-cell polyethylene foams with a density of from about 2 pounds per cubic foot to a density of about 4 pounds per cubic foot.

Spear, Jonathan D (San Francisco, CA)

2011-07-05T23:59:59.000Z

384

It's The Fluids SEG Honorary Lecture  

E-Print Network (OSTI)

Coarse Sand w/o THF-Hydrates Coarse Sand w/ THF-Hydrates #12;Guest Molecules Gas Hydrate Crystal information please visit: #12;·WATER and BRINE (BRINE = H2O + Salt) ·HYDROCARBONS Oil Gas TYPES of PORE FLUIDS Gas Mixtures ·DRILLING MUD ·PRODUCTION FLUIDS Miscible Injectants (CO2, Enriched Gas) #12;From Ivar

385

Dense colloidal fluids form denser amorphous sediments  

E-Print Network (OSTI)

Dense colloidal fluids form denser amorphous sediments Shir R. Libera,b , Shai Borohovicha of their randomly packed solid sediments. We demonstrate that the most dilute fluids of colloidal hard spheres form loosely packed sediments, where the volume fraction of the particles approaches in frictional systems

Schofield, Andrew B.

386

Supercritical Fluid Extraction of Wood Pulps  

Science Journals Connector (OSTI)

......capillary column inlet system which was main tained...great concern in this study because (a) their relative...McNally and J.R. Wheeler. J. Chromatogr. 447...Chaplin, and N.R. Foster. J. Supercrit. Fluids...Wells, and N.R. Foster. J. Supercrit. Fluids......

A.J. Sequeira; L.T. Taylor

1992-10-01T23:59:59.000Z

387

Engineering Insights 2006 Complex Fluids Design Consortium  

E-Print Network (OSTI)

Engineering Insights 2006 Complex Fluids Design Consortium (CFDC) www.mrl.ucsb.edu/cfdc Overview;Engineering Insights 2006 Objectives -- continued · Create a world-class center for complex fluid and soft and Research Highlights Glenn Fredrickson October 18, 2006 #12;Engineering Insights 2006 What is the CFDC

California at Santa Barbara, University of

388

E-Print Network 3.0 - advective- dispersive formulation Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

of the advection dispersion equation. 12;Point like injectionPoint like injection Transport... transport formulations and dispersion ... Source: Politcnica de Catalunya,...

389

E-Print Network 3.0 - anomalous dispersion phase-matching Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

to travel at its luminal group velocity but phase-match to dispersive waves... dispersive radiation to be ... Source: Gaeta, Alexander L. - School of Applied and Engineering...

390

E-Print Network 3.0 - atmospheric dispersion study Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

-WIND DISPERSAL IN FRESHWATER WETLANDS: KNOWLEDGE FOR CONSERVATION AND RESTORATION -271 Applied Vegetation Science 9: 271-278, 2006 Summary: , seed dispersal by water has been...

391

Low Cost Fabrication of Oxide Dispersion Strengthened Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Cost Fabrication of Oxide Dispersion Low Cost Fabrication of Oxide Dispersion Strengthened Materials Background To obtain significant increases in the efficiency of coal fired power plants, steam pressure and temperature must be increased beyond current technology to advanced ultra-supercritical (A-USC) conditions -temperatures and pressures up to 760 degrees Celsius (°C) and 35 megapascals (MPa). The upper bounds of operating pressure and temperature are limited by the properties of the current set

392

Definition: Isotopic Analysis- Fluid | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Isotopic Analysis- Fluid Jump to: navigation, search Dictionary.png Isotopic Analysis- Fluid Isotopes are atoms of the same element that have different numbers of neutrons. An isotopic analysis looks at a particular isotopic element(s) in a given system, while the conditions which increase/decrease the number of neutrons are well understood and measurable. Fluid isotopes are used to characterize a fluids origin, age, and/or interaction with rocks or other fluids based on unique isotopic ratios or concentrations.[1] View on Wikipedia Wikipedia Definition Isotope geochemistry is an aspect of geology based upon study of the relative and absolute concentrations of the elements and their isotopes in

393

Definition: Fluid Lab Analysis | Open Energy Information  

Open Energy Info (EERE)

Fluid Lab Analysis Fluid Lab Analysis Jump to: navigation, search Dictionary.png Fluid Lab Analysis Fluid lab analysis encompasses a broad array of techniques used for the analysis of water and gas samples. These analyses are used in a variety of disciplines to quantify the chemical components and properties of groundwater systems. In geothermal exploration and development, fluid analyses often provide a first look into the characteristics of a hydrothermal system, and are routinely used in ongoing monitoring of geothermal reservoirs.[1] View on Wikipedia Wikipedia Definition Water chemistry analyses are carried out to identify and quantify the chemical components and properties of a certain water. This include pH, major cations and anions, trace elements and isotopes. Water chemistry

394

Definition: Downhole Fluid Sampling | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Downhole Fluid Sampling Jump to: navigation, search Dictionary.png Downhole Fluid Sampling Downhole fluid sampling is done to characterize the chemical, thermal, or hydrological properties of a surface or subsurface aqueous system. Downhole fluid sampling is typically performed to monitor water quality, study recharge and flow in groundwater systems, and evaluate resource potential of geothermal reservoirs. Analysis of both the liquid and gas fractions of the reservoir fluid allows for detailed characterize the chemical, thermal, or hydrological properties of the subsurface hydrothermal system. View on Wikipedia Wikipedia Definition Ret Like Like You like this.Sign Up to see what your friends like.

395

Fluid Lab Analysis | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Fluid Lab Analysis Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Fluid Lab Analysis Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Fluid Lab Analysis Parent Exploration Technique: Lab Analysis Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Results can aid in the determination of fluid source regions and circulation pathways, and assist in determining the degree of mixing between different hydrothermal fluids. Thermal: Certain elements exhibit high spatial correlation with high-temperature geothermal systems; Isotopic ratios can be used to characterize and locate subsurface thermal anomalies.

396

Modelling anisotropic fluid spheres in general relativity  

E-Print Network (OSTI)

We argue that an arbitrary general relativistic anisotropic fluid sphere, (spherically symmetric but with transverse pressure not equal to radial pressure), can nevertheless be successfully modelled by suitable linear combinations of quite ordinary classical matter: an isotropic perfect fluid, a classical electromagnetic field, and a classical (minimally coupled) scalar field. While the most general decomposition is not unique, a preferred minimal decomposition can be constructed that is unique. We show how the classical energy conditions for the anisotropic fluid sphere can be related to energy conditions for the isotropic perfect fluid, electromagnetic field, and scalar field components of the model. Furthermore we show how this decomposition relates to the distribution of electric charge density and scalar charge density throughout the model that is used to mimic the anisotropic fluid sphere. Consequently, we can build physically reasonable matter models for almost any spherically symmetric spacetime.

Boonserm, Petarpa; Visser, Matt

2015-01-01T23:59:59.000Z

397

Euler's fluid equations: Optimal Control vs Optimization  

E-Print Network (OSTI)

An optimization method used in image-processing (metamorphosis) is found to imply Euler's equations for incompressible flow of an inviscid fluid, without requiring that the Lagrangian particle labels exactly follow the flow lines of the Eulerian velocity vector field. Thus, an optimal control problem and an optimization problem for incompressible ideal fluid flow both yield the \\emph {same} Euler fluid equations, although their Lagrangian parcel dynamics are \\emph{different}. This is a result of the \\emph{gauge freedom} in the definition of the fluid pressure for an incompressible flow, in combination with the symmetry of fluid dynamics under relabeling of their Lagrangian coordinates. Similar ideas are also illustrated for SO(N) rigid body motion.

Darryl D. Holm

2009-09-28T23:59:59.000Z

398

Pumping viscoelastic two-fluid media  

E-Print Network (OSTI)

Using a two-fluid model for viscoelastic polymer solutions, we study analytically fluid transport driven by a transverse, small amplitude traveling wave propagation. The pumping flow far from the waving boundary is shown to be strongly wave number and viscosity dependent, in contrast to a viscous Newtonian fluid. We find the two qualitatively different regimes: In one regime relevant to small wave numbers, the fluidic transport is almost the same as the Newtonian case, and uniform viscoelastic constitutive equations provide a good approximation. In the other regime, the pumping is substantially decreased because of the gel-like character. The boundary separating these two regimes is clarified. Our results suggest possible needs of two-fluid descriptions for the transport and locomotion in biological fluids with cilia and flagella.

Hirofumi Wada

2010-04-08T23:59:59.000Z

399

Dispersive processes in models of regional radionuclide migration. Technical memorandum  

SciTech Connect

Three broad areas of concern in the development of aquifer scale transport models will be local scale diffusion and dispersion processes, regional scale dispersion processes, and numerical problems associated with the advection-dispersion equation. Local scale dispersion processes are fairly well understood and accessible to observation. These processes will generally be dominated in large scale systems by regional processes, or macro-dispersion. Macro-dispersion is primarily the result of large scale heterogeneities in aquifer properties. In addition, the effects of many modeling approximations are often included in the process. Because difficulties arise in parameterization of this large scale phenomenon, parameterization should be based on field measurements made at the same scale as the transport process of interest or else partially circumvented through the application of a probabilistic advection model. Other problems associated with numerical transport models include difficulties with conservation of mass, stability, numerical dissipation, overshoot, flexibility, and efficiency. We recommend the random-walk model formulation for Lawrence Livermore Laboratory's purposes as the most flexible, accurate and relatively efficient modeling approach that overcomes these difficulties.

Evenson, D.E.; Dettinger, M.D.

1980-05-01T23:59:59.000Z

400

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION  

Open Energy Info (EERE)

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Details Activities (1) Areas (1) Regions (0) Abstract: Vein and alteration assemblages from eight Coso wells have been collected and their fluid-inclusion gases analyzed by quadrupole mass spectrometry. Four major types of alteration were sampled: 1) young calcite-hematite-pyrite veins; 2) wairakite or epidote veins and alteration that are spatially associated with deep reservoirs in the main field and eastern wells; 3) older sericite and pyrite wallrock alteration; and 4) stilbite-calcite veins that are common in cooler or marginal portions of

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Thermal Storage and Advanced Heat Transfer Fluids (Fact Sheet)  

SciTech Connect

Fact sheet describing NREL CSP Program capabilities in the area of thermal storage and advanced heat transfer fluids: measuring thermophysical properties, measuring fluid flow and heat transfer, and simulating flow of thermal energy and fluid.

Not Available

2010-08-01T23:59:59.000Z

402

Heat Transfer in Wedge Flow of a Micropolar Fluid  

Science Journals Connector (OSTI)

The theory of fluids with microstructures was first given by Eringen ... , 1965), and they are called micropolar fluids. These fluids exhibit microrotational effects and microrotational inertia. The flow of such

V. M. Soundalgekar; H. S. Takhar

1980-01-01T23:59:59.000Z

403

The incorporation of bubbles into a computer graphics fluid simulation  

E-Print Network (OSTI)

We present methods for incorporating bubbles into a photorealistc fluid simulation. Previous methods of fluid simulation in computer graphics do not include bubbles. Our system automatically creates bubbles, which are simulated on top of the fluid...

Greenwood, Shannon Thomas

2005-08-29T23:59:59.000Z

404

A model of overall regulation of body fluids  

Science Journals Connector (OSTI)

A large-scale model of body fluid regulation was presented for the purpose of studying problems concerning body fluid disturbances and fluid therapy. This model, containing subsystems of circulation, respirati...

Noriaki Ikeda; Fumiaki Marumo; Masuo Shirataka

1979-01-01T23:59:59.000Z

405

Arterial LDL Transport Incorporating Fluid Solid Interactions, Hyperthermia, and Atherosclerosis  

E-Print Network (OSTI)

of Mechanical Engineers, Fluids Engineering Division (FED, Bio-Medical Fluids Engineering 21, 8. Buckwalter, J.Fluid Solid Interactions, Hyperthermia, and Atherosclerosis by Stephen Chung Doctor of Philosophy, Graduate Program in Mechanical Engineering

Chung, Stephen

2013-01-01T23:59:59.000Z

406

Packing frustration in dense confined fluids  

E-Print Network (OSTI)

Packing frustration for confined fluids, i.e., the incompatibility between the preferred packing of the fluid particles and the packing constraints imposed by the confining surfaces, is studied for a dense hard-sphere fluid confined between planar hard surfaces at short separations. The detailed mechanism for the frustration is investigated via an analysis of the anisotropic pair distributions of the confined fluid, as obtained from integral equation theory for inhomogeneous fluids at pair correlation level within the anisotropic Percus-Yevick approximation. By examining the mean forces that arise from interparticle collisions around the periphery of each particle in the slit, we calculate the principal components of the mean force for the density profile - each component being the sum of collisional forces on a particle's hemisphere facing either surface. The variations of these components with the slit width give rise to rather intricate changes in the layer structure between the surfaces, but, as shown in this paper, the basis of these variations can be easily understood qualitatively and often also semi-quantitatively. It is found that the ordering of the fluid is in essence governed locally by the packing constraints at each single solid-fluid interface. A simple superposition of forces due to the presence of each surface gives surprisingly good estimates of the density profiles, but there remain nontrivial confinement effects that cannot be explained by superposition, most notably the magnitude of the excess adsorption of particles in the slit relative to bulk.

Kim Nygrd; Sten Sarman; Roland Kjellander

2014-09-04T23:59:59.000Z

407

Evaluation of Biodiesel Fuels from Supercritical Fluid Processing...  

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

Biodiesel Fuels from Supercritical Fluid Processing with the Advanced Distillation Curve Method Evaluation of Biodiesel Fuels from Supercritical Fluid Processing with the Advanced...

408

Application of Neutron Imaging and Scattering to Fluid Flow and...  

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

Application of Neutron Imaging and Scattering to Fluid Flow and Fracture in EGS Environments Application of Neutron Imaging and Scattering to Fluid Flow and Fracture in EGS...

409

Development of Molten-Salt Heat Trasfer Fluid Technology for...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Development of Molten-Salt Heat Trasfer Fluid Technology for Parabolic Trough Solar Power Plants Development of Molten-Salt Heat Trasfer Fluid Technology for Parabolic Trough Solar...

410

Fracture Network and Fluid Flow Imaging for EGS Applications...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fracture Network and Fluid Flow Imaging for EGS Applications from Multi-Dimensional Electrical Resistivity Structure Fracture Network and Fluid Flow Imaging for EGS Applications...

411

FLUID INCLUSION STRATIGRAPHY: NEW METHOD FOR GEOTHERMAL RESERVOIR...  

Open Energy Info (EERE)

RESERVOIR ASSESSMENT PRELIMINARY RESULTS Abstract Fluid Inclusion Stratigraphy (FIS) is a new technique developed for the oil industry in order to map borehole fluids....

412

Working Fluids Low Global Warming Potential Refrigerants - 2013...  

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

Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review Working Fluids Low Global Warming Potential Refrigerants - 2013 Peer Review Emerging Technologies...

413

FLUID GEOCHEMISTRY AT THE RAFT RIVER GEOTHERMAL FIELD, IDAHO...  

Open Energy Info (EERE)

deep structural controls on fluid pathways in the field, which has compartmentalized the fluids and limited the degree of mixing between them. Authors Ayling, B.; Molling, P.;...

414

Electric Power Generation from Coproduced Fluids from Oil and...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electric Power Generation from Coproduced Fluids from Oil and Gas Wells Electric Power Generation from Coproduced Fluids from Oil and Gas Wells The primary objective of this...

415

Fluid injection and production apparatus and method  

SciTech Connect

This patent describes an apparatus for transporting fluid. It comprises: a first generally tubular assembly having a first end and a second end, the first assembly having at least one aperture therethrough; a second generally tubular assembly having a first end and a second end and being positioned within the first tubular assembly; a first means for selectively permitting fluid flow between the exterior and the interior of the second assembly; a third generally tubular assembly having a first end and a second end; and a second means for selectively permitting fluid flow between the exterior and the interior of the third assembly.

Deines, T.A.; Ellwood, D.E.

1992-07-28T23:59:59.000Z

416

Apparatus And Method For Fluid Analysis  

DOE Patents (OSTI)

The present invention is an apparatus and method for analyzing a fluid used in a machine or in an industrial process line. The apparatus has at least one meter placed proximate the machine or process line and in contact with the machine or process fluid for measuring at least one parameter related to the fluid. The at least one parameter is a standard laboratory analysis parameter. The at least one meter includes but is not limited to viscometer, element meter, optical meter, particulate meter, and combinations thereof.

Wilson, Bary W. (Richland, WA); Peters, Timothy J. (Richland, WA); Shepard, Chester L. (West Richland, WA); Reeves, James H. (Richland, WA)

2003-05-13T23:59:59.000Z

417

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

E-Print Network (OSTI)

spheric temperature by 0.3 - 0.6 C. Geological sequestration of C02 is an ..... fluids that may be present (brine and a mixture of methane and carbon dioxide}.

Patricio

418

System and method for detection of dispersed broadband signals  

DOE Patents (OSTI)

A system and method for detecting the presence of dispersed broadband signals in real time are disclosed. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos[l brace]2[phi](t)[r brace]. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase [phi](t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of [phi][prime](t). 10 figs.

Qian, S.; Dunham, M.E.

1999-06-08T23:59:59.000Z

419

System and method for detection of dispersed broadband signals  

DOE Patents (OSTI)

A system and method for detecting the presence of dispersed broadband signals in real time. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos{2.phi.(t)}. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase .phi.(t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of .phi.'(t).

Qian, Shie (Austin, TX); Dunham, Mark E. (Los Alamos, NM)

1999-06-08T23:59:59.000Z

420

Method of Manufacturing Micro-Disperse Particles of Sodium Borohydride  

DOE Patents (OSTI)

A compact solid source of hydrogen gas, where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a catalyst, such as cobalt or ruthenium. The micro-disperse particles can have a substantially uniform diameter of 1-10 microns, and preferably about 3-5 microns. Ruthenium or cobalt catalytic nanoparticles can be incorporated in the micro-disperse particles of sodium borohydride, which allows a rapid and complete reaction to occur without the problems associated with caking and scaling of the surface by the reactant product sodium metaborate. A closed loop water management system can be used to recycle wastewater from a PEM fuel cell to supply water for reacting with the micro-disperse particles of sodium borohydride in a compact hydrogen gas generator. Capillary forces can wick water from a water reservoir into a packed bed of micro-disperse fuel particles, eliminating the need for using an active pump.

Kravitz, Stanley H. (Placitas, NM); Hecht, Andrew M. (Sandia Park, NM); Sylwester. Alan P. (Albuquerque, NM); Bell, Nelson S. (Albuquerque, NM)

2008-09-23T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah, November 2005 Through February 2008  

Energy.gov (U.S. Department of Energy (DOE))

Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah, November 2005 Through February 2008

422

Ecological Modelling 147 (2002) 2339 Dispersal success on spatially structured landscapes: when  

E-Print Network (OSTI)

Ecological Modelling 147 (2002) 23­39 Dispersal success on spatially structured landscapes: when do a simulation study in which we explored (1) the conditions under which landscape structure affects dispersal success and (2) the dependency of dispersal success on the choice of dispersal algorithm. We simulated

With, Kimberly A.

423

Excitations of Bose Fluids in Nanotubes  

Science Journals Connector (OSTI)

We discuss the excitation spectra of Bose fluids in the quasi-one dimensional geometries which can be found in interstitial channels of nanotubes and inside individual nanotubes. We compute the collective excitat...

E. S. Hernndez; M. W. Cole

2002-01-01T23:59:59.000Z

424

Geothermal Reservoir Evaluation Considering Fluid Adsorption  

E-Print Network (OSTI)

SGP-"R- 68 Geothermal Reservoir Evaluation Considering Fluid Adsorption and Composition Michael J. Economides September, 1983 Financial support was provided through the Stanford Geothermal Program Contract No Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD UNIVERSITY Stanford

Stanford University

425

Clay-based geothermal drilling fluids  

SciTech Connect

The rheological properties of fluids based on fibrous clays such as sepiolite and attapulgite have been systematically examined under conditions similar to those of geothermal wells, i.e. at elevated temperatures and pressures in environments with concentrated brines. Attapulgite- and sepiolite-based fluids have been autoclaved at temperatures in the range from 70 to 800/sup 0/F with the addition of chlorides and hydroxides of Na, K, Ca, and Mg. The rheological properties (apparent and plastic viscosity, fluid loss, gel strength, yield point, and cake thickness) of the autoclaved fluids have been studied and correlated with the chemical and physical changes that occur in the clay minerals during the autoclaving process.

Guven, N.; Carney, L.L.; Lee, L.J.; Bernhard, R.P.

1982-11-01T23:59:59.000Z

426

Geophysical Fluid Dynamics Laboratory Presented by  

E-Print Network (OSTI)

Dynamics Laboratory Outline: · Introduction · Software Infrastructure Projects: Completed Current consortium for climate-weather community 3 #12;Geophysical Fluid Dynamics Laboratory Software Infrastructure Projects ­ Completed: · Flexible Modeling System (FMS) · FMS Model: Hybrid programming model Memory

427

Controllable adhesion using field-activated fluids  

E-Print Network (OSTI)

We demonstrate that field-responsive magnetorheological fluids can be used for variable-strength controllable adhesion. The adhesive performance is measured experimentally in tensile tests (a.k.a. probe-tack experiments) ...

Ewoldt, Randy H.

428

Fluid Imaging of Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

eere.energy.gov Velocity & Resistivity Imaging Possibility & Potential Fluid Filled Fracture Network? VpVs Ratio Map 500 m below sea level Conductivity Map 500 m below sea level...

429

Working Fluids Low Global Warming Potential Refrigerants  

NLE Websites -- All DOE Office Websites (Extended Search)

Working Fluids Low GWP Working Fluids Low GWP Refrigerants - CRADA Ed Vineyard Oak Ridge National Laboratory vineyardea@ornl.gov (865) 574-0576 3 April 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: - High GWP refrigerants increase CO 2 equivalent emissions for HVAC&R equipment - Low GWP alternatives may increase energy consumption, introduce safety risks, require significant modifications to equipment, and have higher costs

430

Working Fluids Low Global Warming Potential Refrigerants  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Working Fluids Low GWP Working Fluids Low GWP Refrigerants - CRADA Ed Vineyard Oak Ridge National Laboratory vineyardea@ornl.gov (865) 574-0576 3 April 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: - High GWP refrigerants increase CO 2 equivalent emissions for HVAC&R equipment - Low GWP alternatives may increase energy consumption, introduce safety risks, require significant modifications to equipment, and have higher costs

431

Parametric internal waves in a compressible fluid  

E-Print Network (OSTI)

We describe the effect of vibration on a confined volume of fluid which is density stratified due to its compressibility. We show that internal gravity-acoustic waves can be parametrically destabilized by the vibration. The resulting instability is similar to the classic Faraday instability of surface waves, albeit modified by the compressible nature of the fluid. It may be possible to observe experimentally near a gas-liquid critical point.

Kausik S. Das; Stephen W. Morris; A. Bhattacharyay

2007-10-11T23:59:59.000Z

432

Parametric internal waves in a compressible fluid  

E-Print Network (OSTI)

We describe the effect of vibration on a confined volume of fluid which is density stratified due to its compressibility. We show that internal gravity-acoustic waves can be parametrically destabilized by the vibration. The resulting instability is similar to the classic Faraday instability of surface waves, albeit modified by the compressible nature of the fluid. It may be possible to observe experimentally near a gas-liquid critical point.

Das, Kausik S; Bhattacharyay, A

2007-01-01T23:59:59.000Z

433

Anisotropic surface tension of buckled fluid membrane  

E-Print Network (OSTI)

Solid sheets and fluid membranes exhibit buckling under lateral compression. Here, it is revealed that fluid membranes have anisotropic buckling surface tension contrary to solid sheets. Surprisingly, the surface tension perpendicular to the buckling direction shows stronger dependence than that parallel to it. Our theoretical predictions are supported by numerical simulations of a meshless membrane model. This anisotropic tension can be used to measure the membrane bending rigidity. It is also found phase synchronization occurs between multilayered buckled membranes.

Hiroshi Noguchi

2011-06-01T23:59:59.000Z

434

Fluid driven torsional dipole seismic source  

DOE Patents (OSTI)

A compressible fluid powered oscillating downhole seismic source device capable of periodically generating uncontaminated horizontally-propagated, shear waves is provided. A compressible fluid generated oscillation is created within the device which imparts an oscillation to a housing when the device is installed in a housing such as the cylinder off an existing downhole tool, thereby a torsional seismic source is established. Horizontal waves are transferred to the surrounding bore hole medium through downhole clamping.

Hardee, Harry C. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

435

Control system for fluid heated steam generator  

DOE Patents (OSTI)

A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.

Boland, J.F.; Koenig, J.F.

1984-05-29T23:59:59.000Z

436

Stirling engine with air working fluid  

DOE Patents (OSTI)

A Stirling engine capable of utilizing air as a working fluid which includes a compact heat exchange module which includes heating tube units, regenerator and cooler positioned about the combustion chamber. This arrangement has the purpose and effect of allowing the construction of an efficient, high-speed, high power-density engine without the use of difficult to seal light gases as working fluids.

Corey, John A. (North Troy, NY)

1985-01-01T23:59:59.000Z

437

Viscosity of High Energy Nuclear Fluids  

E-Print Network (OSTI)

Relativistic high energy heavy ion collision cross sections have been interpreted in terms of almost ideal liquid droplets of nuclear matter. The experimental low viscosity of these nuclear fluids have been of considerable recent quantum chromodynamic interest. The viscosity is here discussed in terms of the string fragmentation models wherein the temperature dependence of the nuclear fluid viscosity obeys the Vogel-Fulcher-Tammann law.

V. Parihar; A. Widom; D. Drosdoff; Y. N. Srivastava

2007-03-15T23:59:59.000Z

438

High gliding fluid power generation system with fluid component separation and multiple condensers  

DOE Patents (OSTI)

An example power generation system includes a vapor generator, a turbine, a separator and a pump. In the separator, the multiple components of the working fluid are separated from each other and sent to separate condensers. Each of the separate condensers is configured for condensing a single component of the working fluid. Once each of the components condense back into a liquid form they are recombined and exhausted to a pump that in turn drives the working fluid back to the vapor generator.

Mahmoud, Ahmad M; Lee, Jaeseon; Radcliff, Thomas D

2014-10-14T23:59:59.000Z

439

Lack of dispersion cancellation with classical phase-sensitive light  

SciTech Connect

Shapiro recently argued that nonlocal dispersion cancellation using entangled pairs of photons is essentially classical in nature, based on a comparison with a classical model in which two stationary, chaotic beams of light have phases and frequencies that are anticorrelated, which he refers to as 'phase-sensitive' light [J. H. Shapiro, Phys. Rev. A 81, 023824 (2010)]. It is shown here that there is no physical cancellation of dispersion for classical light of that kind and Shapiro's results merely reflect the fact that identical dispersion occurs in both beams. The origin of the cross correlations between the intensities of the two beams is shown to be completely different in the classical and quantum mechanical cases.

Franson, J. D. [Physics Department, University of Maryland, Baltimore County, Baltimore, Maryland 21250 (United States)

2010-02-15T23:59:59.000Z

440

Theory of angular dispersive imaging hard x-ray spectrographs  

E-Print Network (OSTI)

A spectrograph is an optical instrument that disperses photons of different energies into distinct directions and space locations, and images photon spectra on a position-sensitive detector. Spectrographs consist of collimating, angular dispersive, and focusing optical elements. Bragg reflecting crystals arranged in an asymmetric scattering geometry are used as the dispersing elements. A ray-transfer matrix technique is applied to propagate x-rays through the optical elements. Several optical designs of hard x-ray spectrographs are proposed and their performance is analyzed. Spectrographs with an energy resolution of 0.1 meV and a spectral window of imaging up to a few tens of meVs are shown to be feasible for inelastic x-ray scattering (IXS) spectroscopy applications. In another example, a spectrograph with a 1-meV spectral resolution and 85-meV spectral window of imaging is considered for Cu K-edge resonant IXS (RIXS).

Shvyd'ko, Yuri

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Black/White hole radiation from dispersive theories  

E-Print Network (OSTI)

We study the fluxes emitted by black holes when using dispersive field theories. We work with stationary one dimensional backgrounds which are asymptotically flat on both sides of the horizon. The asymptotic fluxes are governed by a 3x3 Bogoliubov transformation. The fluxes emitted by the corresponding white holes are regular and governed by the inverse transformation. We numerically compute the spectral properties of these fluxes for both sub- and superluminal quartic dispersion. The leading deviations with respect to the dispersionless flux are computed and shown to be governed by a critical frequency above which there is no radiation. Unlike the UV scale governing dispersion, its value critically depends on the asymptotic properties of the background. We also study the flux outside the robust regime. In particular we show that its low frequency part remains almost thermal but with a temperature which significantly differs from the standard one. Application to four dimensional black holes and Bose-Einstein condensates are in preparation.

Jean Macher; Renaud Parentani

2009-06-02T23:59:59.000Z

442

New ceramics containing dispersants for improved fracture toughness  

DOE Patents (OSTI)

The invention is a ceramic composition containing a new class of dispersant for hindering crack propagation by means of one or more energy-dissipative mechanisms. The composition is composed of a ceramic matrix with dispersed particles of a transformation-prone rare-earth niobate, tantalate or mixtures of these with each other and/or with a rare-earth vanadate. The dispersants, having a generic composition tRBO/sub 4/, where R is a rare-earth element, B if Nb or Ta and O is oxygen, are mixed in powder form with a powder of the matrix ceramic and sintered to produce a ceramic form or body. The crack-hindering mechanisms operates to provide improved performance over a wide range of temperature and operating conditions.

Nevitt, M.V.; Aldred, A.T.; Chan, Sai-Kit

1985-07-01T23:59:59.000Z

443

Polydispersity analysis of Taylor dispersion data: the cumulant method  

E-Print Network (OSTI)

Taylor dispersion analysis is an increasingly popular characterization method that measures the diffusion coefficient, and hence the hydrodynamic radius, of (bio)polymers, nanoparticles or even small molecules. In this work, we describe an extension to current data analysis schemes that allows size polydispersity to be quantified for an arbitrary sample, thereby significantly enhancing the potentiality of Taylor dispersion analysis. The method is based on a cumulant development similar to that used for the analysis of dynamic light scattering data. Specific challenges posed by the cumulant analysis of Taylor dispersion data are discussed, and practical ways to address them are proposed. We successfully test this new method by analyzing both simulated and experimental data for solutions of moderately polydisperse polymers and polymer mixtures.

Luca Cipelletti; Jean-Philippe Biron; Michel Martin; Herv Cottet

2014-08-26T23:59:59.000Z

444

Comparison of Average Transport and Dispersion Among a Gaussian, a  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Comparison of Average Transport and Dispersion Among a Gaussian, a Comparison of Average Transport and Dispersion Among a Gaussian, a Two-Dimensional, and a Three-Dimensional Model Comparison of Average Transport and Dispersion Among a Gaussian, a Two-Dimensional, and a Three-Dimensional Model The Nuclear Regulatory Commission's (NRC's) code for predicting off-site consequences, MACCS2 (Chanin, et al. 1998) (MELCOR Accident Consequence Code System, Version 2), uses a simplified model for atmospheric transport and d ispersion (ATD), that is, a straight-line Gaussian model. The MACCS2 calculations are used by the NRC for planning purposes, for cost-benefit analyses, and in level-3 probabilistic risk analyses (PRAs). The MACCS2 ATD model has been criticized as being overly simplistic, even for its purposes. The justification for its use has been

445

Selection of fluids for tritium pumping systems  

SciTech Connect

The degradation characteristics of three types of vacuum pump fluids, polyphenyl ethers, perfluoropolyethers and hydrocarbon oils were reviewed. Fluid selection proved to be a critical factor in the long-term performance of tritium pumping systems and subsequent tritium recovery operations. Thermal degradation and tritium radiolysis of pump fluids produce contaminants which can damage equipment and interfere with tritium recovery operations. General characteristics of these fluids are as follows: polyphenyl ether has outstanding radiation resistance, is very stable under normal diffusion pump conditions, but breaks down in the presence of oxygen at anticipated operating temperatures. Perfluoropolyether fluids are very stable and do not react chemically with most gases. Thermal and mechanical degradation products are inert, but the radiolysis products are very corrosive. Most of the degradation products of hydrogen oils are volatile and the principal radiolysis product is methane. Our studies show that polyphenyl ethers and hydrocarbon oils are the preferred fluids for use in tritium pumping systems. No corrosive materials are formed and most of the degradation products can be removed with suitable filter systems.

Chastagner, P

1984-02-01T23:59:59.000Z

446

Extended, Continuous Pt Nanostructures in Thick, Dispersed Electrodes  

NLE Websites -- All DOE Office Websites (Extended Search)

Bryan Pivovar (PI) Bryan Pivovar (PI) National Renewable Energy Laboratory Sept 30, 2009 Extended, Continuous Pt Nanostructures in Thick, Dispersed Electrodes This presentation does not contain any proprietary, confidential, or otherwise restricted information Objectives To assist the DOE Fuel Cell Technologies (FCT) Program in meeting cost, durability, and performance targets in the areas of Electrocatalysts and MEAs. Approach: Novel Synthesis and Electrode Studies Pt nanotubes (UC-R) Pt coated carbon nanotubes Synthesis of novel catalysts based on extended surfaces due to 3M's demonstrated improvements in specific activity and durability using similar systems. Electrode architecture design, based on novel catalyst structures that allow thick (~10 µm), dispersed electrodes to

447

AIR DISPERSION MODELING AT THE WASTE ISOLATION PILOT PLANT  

SciTech Connect

One concern at the Waste Isolation Pilot Plant (WIPP) is the amount of alpha-emitting radionuclides or hazardous chemicals that can become airborne at the facility and reach the Exclusive Use Area boundary as the result of a release from the Waste Handling Building (WHB) or from the underground during waste emplacement operations. The WIPP Safety Analysis Report (SAR), WIPP RCRA Permit, and WIPP Emergency Preparedness Hazards Assessments include air dispersion calculations to address this issue. Meteorological conditions at the WIPP facility will dictate direction, speed, and dilution of a contaminant plume of respirable material due to chronic releases or during an accident. Due to the paucity of meteorological information at the WIPP site prior to September 1996, the Department of Energy (DOE) reports had to rely largely on unqualified climatic data from the site and neighboring Carlsbad, which is situated approximately 40 km (26 miles) to the west of the site. This report examines the validity of the DOE air dispersion calculations using new meteorological data measured and collected at the WIPP site since September 1996. The air dispersion calculations in this report include both chronic and acute releases. Chronic release calculations were conducted with the EPA-approved code, CAP88PC and the calculations showed that in order for a violation of 40 CFR61 (NESHAPS) to occur, approximately 15 mCi/yr of 239Pu would have to be released from the exhaust stack or from the WHB. This is an extremely high value. Hence, it is unlikely that NESHAPS would be violated. A site-specific air dispersion coefficient was evaluated for comparison with that used in acute dose calculations. The calculations presented in Section 3.2 and 3.3 show that one could expect a slightly less dispersive plume (larger air dispersion coefficient) given greater confidence in the meteorological data, i.e. 95% worst case meteorological conditions. Calculations show that dispersion will decrease slightly if a more stable wind class is assumed, where very little vertical mixing occurs. It is recommended that previous reports which used fixed values for calculating the air dispersion coefficient be updated to reflect the new meteorological data, such as the WIPP Safety Analysis Report and the WIPP Emergency Preparedness Hazards Assessment. It is also recommended that uncertainty be incorporated into the calculations so that a more meaningful assessment of risk during accidents can be achieved.

Rucker, D.F.

2000-08-01T23:59:59.000Z

448

Alcohol Dispersions of Calcium Hydroxide Nanoparticles for Stone Conservation  

Science Journals Connector (OSTI)

Alcohol dispersions of Ca(OH)2 nanoparticles, the so-called nanolimes, are emerging as an effective conservation material for the consolidation of stone, mortars, and plasters present in old masonry and/or mural paintings. ... Considering that past studies on the consolidation of stone using nanolime dispersions have focused on carbonate stones such as limestones, here we test the ability of these treatments to consolidate silicate stones. ... DArmada, P.; Hirst, E.Nano-lime for consolidation of plaster and stone J. Architect. ...

Carlos Rodriguez-Navarro; Amelia Suzuki; Encarnacion Ruiz-Agudo

2013-08-06T23:59:59.000Z

449

Scattering approach to dispersive atom-surface interactions  

SciTech Connect

We develop the scattering approach for the dispersive force on a ground state atom on top of a corrugated surface. We present explicit results to first order in the corrugation amplitude. A variety of analytical results are derived in different limiting cases, including the van der Waals and Casimir-Polder regimes. We compute numerically the exact first-order dispersive potential for arbitrary separation distances and corrugation wavelengths, for a Rubidium atom on top of a silicon or gold corrugated surface. We consider in detail the correction to the proximity force approximation, and present a very simple approximation algorithm for computing the potential.

Dalvit, Diego [Los Alamos National Laboratory; Messina, Riccardo [LAB KASTLER BROSSEL; Maia Neto, Paulo [INSTITUTO DE FISICA UFRJ; Lambrecht, Astrid [LAB KASTLER BROSSEL; Reynaud, Serge [LAB KASTLER BROSSEL

2009-01-01T23:59:59.000Z

450

Geometric Doppler Effect: Spin-Split Dispersion of Thermal Radiation  

Science Journals Connector (OSTI)

A geometric Doppler effect manifested by a spin-split dispersion relation of thermal radiation is observed. A spin-dependent dispersion splitting was obtained in a structure consisting of a coupled thermal antenna array. The effect is due to a spin-orbit interaction resulting from the dynamics of the surface waves propagating along the structure whose local anisotropy axis is rotated in space. The observation of the spin-symmetry breaking in thermal radiation may be utilized for manipulation of spontaneous or stimulated emission.

Nir Dahan; Yuri Gorodetski; Kobi Frischwasser; Vladimir Kleiner; Erez Hasman

2010-09-21T23:59:59.000Z

451

The dispersion relation of pion in nuclear matter  

E-Print Network (OSTI)

We put forward a formalism to calculate the relativistic particle - hole and delta - hole excitation polarization insertion for pion propagator by using the particle - hole - antiparticle representation of nucleon and delta propagators in nuclear matter. The real and the imaginary part of the polarization insertion and the dispersion relation for pion propagator are calculated numerically. We find that the short range correlation enhances the delta - hole excitation but suppresses the particle - hole excitation, it also suppresses the pion condensation. We find that the effect of the short range correlation on the pion dispersion relation depends very much on the form of the short range correlation and the parameters involved.

Liang-gang Liu; Masahiro Nakano

1997-09-09T23:59:59.000Z

452

Lattice Boltzmann Methods for Fluid-Structure Interaction Problems  

E-Print Network (OSTI)

Lattice Boltzmann Methods for Fluid-Structure Interaction Problems Alfonso Caiazzo, Eric Lorenz, Firdaouss M, Lallemand P. Momentum transfer on a Boltzmann lattice fluid with Boundaries, Phys. Fluids 13, 3452-3459, 2002. [2] Caiazzo, A. Asymptotic Analysis of lattice Boltzmann Method for Fluid- Structure

453

Geophysical Fluid Dynamics Laboratory Review May 20 May 22, 2014  

E-Print Network (OSTI)

in modeling fluid dynamics and heat transfer in large facilities is being applied to the analysis of new might use 25% less fuel than a conventional vehicle. Cool Designs for Hot Spaces Computational Fluid Computational Fluid Dynamics model. (Image Right) Image showing the geometry of a typical Computational Fluid

454

New fluids help increase effectiveness of hydraulic fracturing  

SciTech Connect

It is important to choose the most effective fluid for hydraulic fracturing a particular formation. Fracturing fluids are used to initiate formation parting, extend the fracture into the reservoir, and to transport and distribute proppant. This paper discusses the fundamental of fluid types, viscosifiers, and fluid rheology.

Ebinger, C.D.; Hunt, E.

1989-06-05T23:59:59.000Z

455

Fundamentals of Engineering (FE) Exam Fluid Mechanics Review  

E-Print Network (OSTI)

one unit area layer of a substance over another � Viscosity (�): measure of a fluid's resistance Energy, Friction Loss, and Pipe Flow Momentum and Drag #12;Pressure � Gage pressure: measured relative Engineering March 22, 2013 #12;Morning (Fluid Mechanics) A. Flow measurement B. Fluid properties C. Fluid

Provancher, William

456

Boston University Department of Mechanical Engineering ME 303 Fluid Mechanics  

E-Print Network (OSTI)

Boston University Department of Mechanical Engineering ME 303 ­ Fluid Mechanics Fall 2011 Class: EK301 Engineering Mechanics Course Textbook: Fundamentals of Fluid Mechanics, 6th ed., Munson B. Reference Texts: Fluid Mechanics, Landau and Lifshitz, Vol. 6 Fluid Mechanics, Y. Cengel and J. Cimbala

457

Effects of sintering additives on dispersion properties of Al2O3 slurry containing polyacrylic acid dispersant  

Science Journals Connector (OSTI)

The effects of sintering aid adsorption on the dispersion properties of aluminum oxide slurries were investigated. We considered Al2O3 slurry without additives and Al2O3 slurry with a Mg additive with 0.1mass% in oxide equivalent as a sintering aid. In this study, we evaluated the adsorption isotherm of polyacrylic acid (PAA) onto Al2O3 and the dispersion degree of Al2O3 slurries in sedimentation tests under gravity. The adsorption isotherm featured a characteristic adsorption isothermal line with a maximum value when Mg additive was present in Al2O3. In addition, the packing fractions did not correspond to the apparent viscosity. However, in slurry that was allowed to settle for several days, both of them agreed.Therefore, the disagreement between the packing fraction and the apparent viscosity immediately after preparation arose from changes of the dispersion state, such as the decrease of the distance between particles with time.

Hiromi Ohtsuka; Hidetoshi Mizutani; Satoshi IIO; Kazuki Asai; Takayoshi Kiguchi; Hiroshi Satone; Takamasa Mori; Junichiro Tsubaki

2011-01-01T23:59:59.000Z

458

"Nanotechnology Enabled Advanced Industrial Heat Transfer Fluids"  

SciTech Connect

ABSTRACT Nanotechnology Enabled Advanced industrial Heat Transfer Fluids Improving the efficiency of Industrial Heat Exchangers offers a great opportunity to improve overall process efficiencies in diverse industries such as pharmaceutical, materials manufacturing and food processing. The higher efficiencies can come in part from improved heat transfer during both cooling and heating of the material being processed. Additionally, there is great interest in enhancing the performance and reducing the weight of heat exchangers used in automotives in order to increase fuel efficiency. The goal of the Phase I program was to develop nanoparticle containing heat transfer fluids (e.g., antifreeze, water, silicone and hydrocarbon-based oils) that are used in transportation and in the chemical industry for heating, cooling and recovering waste heat. Much work has been done to date at investigating the potential use of nanoparticle-enhanced thermal fluids to improve heat transfer in heat exchangers. In most cases the effect in a commercial heat transfer fluid has been marginal at best. In the Phase I work, we demonstrated that the thermal conductivity, and hence heat transfer, of a fluid containing nanoparticles can be dramatically increased when subjected to an external influence. The increase in thermal conductivity was significantly larger than what is predicted by commonly used thermal models for two-phase materials. Additionally, the surface of the nanoparticles was engineered so as to have a minimal influence on the viscosity of the fluid. As a result, a nanoparticle-laden fluid was successfully developed that can lead to enhanced heat transfer in both industrial and automotive heat exchangers

Dr. Ganesh Skandan; Dr. Amit Singhal; Mr. Kenneth Eberts; Mr. Damian Sobrevilla; Prof. Jerry Shan; Stephen Tse; Toby Rossmann

2008-06-12T23:59:59.000Z

459

Identification of parameters in building concentration dispersion model  

E-Print Network (OSTI)

1 Identification of parameters in building concentration dispersion model D. Calogine*,1 , H. Boyer, 17, 11, 20] use macroscopic models, which represent room or entire building by a single node Abstract The aim of this work is to simulate the pollutants transport in buildings. Focusing mainly

Paris-Sud XI, Université de

460

Metallophilic interactions from dispersion-corrected density-functional theory  

SciTech Connect

In this article, we present the first comprehensive study of metallophilic (aurophilic) interactions using dispersion-corrected density-functional theory. Dispersion interactions (an essential component of metallophilicity) are treated using the exchange-hole dipole moment (XDM) model. By comparing against coupled-cluster benchmark calculations on simple dimers, we show that LC-?PBE-XDM is a viable functional to study interactions between closed-shell transition metals and that it performs uniformly better than second-order Mller-Plesset theory, the basic computational technique used in previous works. We apply LC-?PBE-XDM to address several open questions regarding metallophilicity, such as the interplay between dispersion and relativistic effects, the interaction strength along group 11, the additivity of homo- and hetero-metallophilic effects, the stability of [E(AuPH{sub 3}){sub 4}]{sup +} cations (E = N, P, As, Sb), and the role of metallophilic effects in crystal packing. We find that relativistic effects explain the prevalence of aurophilicity not by stabilizing metal-metal contacts, but by preventing gold from forming ionic structures involving bridge anions (which are otherwise common for Ag and Cu) as a result of the increased electron affinity of the metal. Dispersion effects are less important than previously assumed and their stabilization contribution is relatively independent of the metal.

Otero-de-la-Roza, Alberto, E-mail: aoterodelaroza@ucmerced.edu; Mallory, Joel D.; Johnson, Erin R., E-mail: ejohnson29@ucmerced.edu [Chemistry and Chemical Biology, School of Natural Sciences, University of California, Merced, 5200 North Lake Road, Merced, California 95343 (United States)

2014-05-14T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Dispersion diagrams of chromospheric MHD waves in a 2D  

E-Print Network (OSTI)

Dispersion diagrams of chromospheric MHD waves in a 2D simulation Chris Dove The Evergreen State MHD code models dynamics · Methods to get clearer pictures · Analysis of results · Patterns/NCAR, Thursday 29 July 2004 A diagram of the Sun, courtesy NASA sohowww

Zita, E.J.

462

A new microturbine-based dispersed generation scheme  

Science Journals Connector (OSTI)

Almost all of the commercial microturbine-based dispersed generation systems today are composed of a high-speed permanent-magnet alternator and a diode rectifier-PWM inverter pair. A dispersed generation scheme ?? made up of a microturbine, an induction generator, and a diode rectifier-PWM inverter pair ?? is introduced in this paper. A complete model for the self-excited squirrel-cage induction generator is developed and used to study the steady-state and transient behaviours of the overall system. The power delivered to the grid is controlled by an injected current control loop. The input/output power balance is maintained by regulating the DC-bus voltage using a new method based on the torque control of microturbine. Analysis shows that the Simulink simulation results of induction generator is a viable substitute for permanent magnet alternator in microturbine-based dispersed generation systems due to its low cost, low maintenance, rugged structure, and slack between rotor speed and terminal frequency, which isolates the transients of the grid from the generator system when the DC-bus capacitor size is reduced. Both schemes have been simulated and the simulation results are presented to compare the proposed scheme based on induction generator with the present microturbine-based dispersed generation scheme based on synchronous machine.

Afshin Majd; Mehrdad Kazerani

2007-01-01T23:59:59.000Z

463

A Tracer Investigation oftheAtmosph^c Dispersion  

E-Print Network (OSTI)

Laboratory Erik Lyck Air Pollution Laboratory National Agency of Environmental Protection Abstract. Mining at Kvanefjeld, Greenland, will result in releases of air polluting gases. In order to measure the dilution and a sea-breeze. INIS-descriptors: AIR POLLUTION; DILUTION; DISPERSION; ENVIRONMENTAL IMPACTS; GASES

464

Sol State Behavior and Gelation Kinetics in Mixed Nanoclay Dispersions  

Science Journals Connector (OSTI)

This chapter investigates sol and gel state behavior, in aqueous salt free dispersions, of clays Laponite (L) and Na Montmorillonite (MMT) at various mixing ratios (L:MMT=r=1:0.5, 1:1 and 1:2). Percolation...

Ravi Kumar Pujala

2014-01-01T23:59:59.000Z

465

Fuel dispersal modeling for aircraft-runway impact scenarios  

SciTech Connect

A fuel dispersal model for C-141 transport accidents was developed for the Defense Nuclear Agency`s Fuel Fire Technology Base Program to support Weapon System Safety Assessments. The spectrum of accidents resulting from aircraft impact on a runway was divided into three fuel dispersal regimes: low, intermediate, and high-velocity impact. Sufficient data existed in the accident, crash test, and fuel-filled bomb literature to support development of a qualitative framework for dispersal models, but not quantitative models for all regimes. Therefore, a test series at intermediate scale was conducted to generate data on which to base the model for the high-velocity regime. Tests were conducted over an impact velocity range from 12 m/s to 91 m/s and angles of impact from 22.5{degrees} to 67.5{degrees}. Dependent variables were area covered by dispersed fuel, amount of mass in that area, and location of the area relative to the impact line. Test results showed that no liquid pooling occurred for impact velocities greater than 61 m/s, independent of the angle of impact. Some pooling did occur at lower velocities, but in no test was the liquid-layer thickness greater than 5.25 mm.

Tieszen, S.R.

1995-11-01T23:59:59.000Z

466

Single atom identification by energy dispersive x-ray spectroscopy  

SciTech Connect

Using aberration-corrected scanning transmission electron microscope and energy dispersive x-ray spectroscopy, single, isolated impurity atoms of silicon and platinum in monolayer and multilayer graphene are identified. Simultaneously acquired electron energy loss spectra confirm the elemental identification. Contamination difficulties are overcome by employing near-UHV sample conditions. Signal intensities agree within a factor of two with standardless estimates.

Lovejoy, T. C.; Dellby, N.; Krivanek, O. L. [Nion, 1102 8th St., Kirkland, Washington 98033 (United States); Ramasse, Q. M. [SuperSTEM Laboratory, STFC Daresbury, Keckwick Lane, Daresbury WA4 4AD (United Kingdom); Falke, M.; Kaeppel, A.; Terborg, R. [Bruker Nano GmbH, Schwarzschildstr. 12, 12489 Berlin (Germany); Zan, R. [School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

2012-04-09T23:59:59.000Z

467

FINITE VOLUME METHODS FOR UNIDIRECTIONAL DISPERSIVE WAVE MODELS  

E-Print Network (OSTI)

], the BBM equation [4] and Boussinesq systems [11, 40, 8]. All these models assume the wave to be weakly to dispersive unidi- rectional water wave propagation in one space dimension. In particular we consider a KdV-BBM differential equation modeling unidirectional wave propagation. Specifically, we consider the KdV-BBM equation

Paris-Sud XI, Université de

468

ccsd00000617 Phonon dispersion in the 1-layer cuprate  

E-Print Network (OSTI)

neutron scattering. PACS numbers: 74.72.Jt, 74.25.Kc, 78.70.Ck x Present address: Physique des Milieux-ray scattering (IXS). The experimental phonon dispersion and the dynamical structure factor are compared for volumes smaller then 0.1 mm 3 (see Bertinotti et al 1997). Such a size is insu?cient for inelastic neutron

469

POLLEN DISPERSAL AND DEPOSITION ON THE QUELCCAYA ICE CAp, PERU  

E-Print Network (OSTI)

POLLEN DISPERSAL AND DEPOSITION ON THE QUELCCAYA ICE CAp, PERU Carl A. Reese and Kam-biu Liu: The relatively young science of tropical ice-core palynology has proven effective in the study of paleoenvironments by its ability to produce long-term and high- resolution paleoclimatic data. However, no studies

Liu, Kam-biu

470

Electrical properties of dispersions of graphene in mineral oil  

SciTech Connect

Dispersions of graphene in mineral oil have been prepared and electrical conductivity and permittivity have been measured. The direct current (DC) conductivity of the dispersions depends on the surface characteristics of the graphene platelets and followed a percolation model with a percolation threshold ranging from 0.05 to 0.1?wt. %. The difference in DC conductivities can be attributed to different states of aggregation of the graphene platelets and to the inter-particle electron transfer, which is affected by the surface radicals. The frequency-dependent conductivity (?(?)) and permittivity (?(?)) were also measured. The conductivity of dispersions with particle contents much greater than the percolation threshold remains constant and equal to the DC conductivity at low frequencies ? with and followed a power-law ?(?)???{sup s} dependence at very high frequencies with s?0.9. For dispersions with graphene concentration near the percolation threshold, a third regime was displayed at intermediate frequencies indicative of interfacial polarization consistent with Maxwell-Wagner effect typically observed in mixtures of two (or more) phases with very distinct electrical and dielectric properties.

Monteiro, O. R., E-mail: othon.monteiro@bakerhughes.com [Baker Hughes, 14990 Yorktown Plaza Dr., Houston, Texas 77040 (United States)

2014-02-03T23:59:59.000Z

471

Deformed dispersion relations and the degree of coherence function  

E-Print Network (OSTI)

The analysis of the modifications that the presence of a deformed dispersion relation entails in the roots of the so--called degree of coherence function, for a beam embodying two different frequencies and moving in a Michelson interferometer, is carried out. The conditions to be satisfied, in order to detect this kind of quantum gravity effect, are also obtained.

A. Camacho; A. Macias

2006-08-16T23:59:59.000Z

472

A Field Experiment to Validate Atmospheric Dispersion and  

E-Print Network (OSTI)

Rise-R.495 A Field Experiment to Validate Atmospheric Dispersion and Dose Models S. P. Nielsen* S Roskilde, Denmark May 1986 #12;RIS?-R-495 DOUBLE TRACER EXPERIMENTS TO EVALUATE ATMOSPHERIC TRANSPORT Pollution Laboratory, Risø National Laboratory, DK-4000 Roskilde, Denmark Abstract. Two tracers

473

Fluid samplers: sampling music keyboards having fluidly continuous action and sound, without being electrophones  

Science Journals Connector (OSTI)

Present-day sampling music keyboards are electronic instruments that fall under the last (5th) category of the Hornbostel Sachs musical instrument classification scheme. Conversely, we first propose an entirely acoustic/mechanical mellotron-like sampling ... Keywords: fluid sampling, fluid user-interfaces, hydraulophones, interactive art, tangible user interfaces, water-based immersive multimedia

Steve Mann; Ryan E. Janzen

2007-09-01T23:59:59.000Z

474

Br-Cl-Na systematics in Illinois basin fluids: Constraints on fluid origin and evolution  

SciTech Connect

The authors present here bromide, chloride, and sodium data for fluids from reservoirs of Ordovician through Pennsylvania age in the Illinois basic which suggest that remnant marine fluids contribute significantly to fluid Cl budgets. Cl/Br and NaBr ratios for Ordovician through Devonian formation fluids are relatively uniform and near those for seawater, despite greater than a factor of ten range in Cl concentration. In contrast, fluids from Mississippian and Pennsylvanian reservoirs, separated from older reservoirs by the New Albany Shale Group, have more variable fluid Cl/Br and Na/Br ratios, most of which are significantly greater then those of seawater. The 1:1 stoichiometry of Cl and Na increases for Mississippian and Pennsylvanian formation fluids is consistent with halite dissolution. Nevertheless, Br systematics and mass-balance considerations indicate that he overall Cl budget of Illinois basin formation fluids appears to be more significantly influenced by the contribution from subaerially evaporated seawater than by halite dissolution.

Walter, L.M.; Huston, T.J. (Washington Univ., St. Louis, Missouri (USA)); Stueber, A.M. (Southern Illinois Univ., Edwardsville (USA))

1990-04-01T23:59:59.000Z

475

Phys. Fluids. Two spheres in a free stream of a second-order fluid  

E-Print Network (OSTI)

Phys. Fluids. Two spheres in a free stream of a second-order fluid A. M. Ardekani1 , R. H. Rangel1 , and D. D. Joseph1,2 1 Department of Mechanical and Aerospace Engineering University of California, Irvine, CA 92697 and 2 Department of Aerospace Engineering and Mechanics University of Minnesota, MN

Joseph, Daniel D.

476

Design and analysis of a high heat load pin-post monochromator crystal with an integral water manifold  

SciTech Connect

Conventional minichannel water cooling geometry will not perform satisfactorily for x-radiation from a wiggler source at the Advanced Photon Source. For closed-gap wiggler operation, cryogenic silicon appears to be the only option for crystals in Bragg-Bragg geometry. For operation of the wiggler at more modest critical energies ({lt}17 keV), the first crystal can be cooled by a pin-post cooling scheme, using water at room temperature as a coolant. In order to limit the water consumption to 4 gpm and hence the risk of introducing vibrations to the crystal, the intensely cooled area of the crystal was matched to the footprint of the beam, leaving a less cooled area of the crystal subject to survival in a missteered beam but not to perform as a monochromator. The manifold design avoids large areas of high water pressure that would bow the crystal. We present here the design of a pin-post monochromator consisting of a four-layer silicon manifold system and an integrally bonded 39{percent} nickel-iron alloy base plate. A transparent prototype of the design will be exhibited. Fabrication techniques and design advantages will be discussed. {copyright} {ital 1996 American Institute of Physics.}

Schildkamp, W. [Consortium for Advanced Radiation Sources, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637 (United States)] [Consortium for Advanced Radiation Sources, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637 (United States); Tonnessen, T. [Rocketdyne Albuquerque Operations, 2511 C. Broadbent Parkway, N.E., Albuquerque, NM 87107 (United States)] [Rocketdyne Albuquerque Operations, 2511 C. Broadbent Parkway, N.E., Albuquerque, NM 87107 (United States)

1996-09-01T23:59:59.000Z

477

Advanced binary cycles: Optimum working fluids  

SciTech Connect

A computer model (Cycle Analysis Simulation Tool, CAST) and a methodology have been developed to perform value analysis for small, low- to moderate-temperature binary geothermal power plants. The value analysis method allows for incremental changes in the levelized electricity cost (LEC) to be determined between a baseline plant and a modified plant. Thermodynamic cycle analyses and component sizing are carried out in the model followed by economic analysis which provides LEC results. The emphasis of the present work is on evaluating the effect of mixed working fluids instead of pure fluids on the LEC of a geothermal binary plant that uses a simple Organic Rankine Cycle. Four resources were studied spanning the range of 265 F to 375 F. A variety of isobutane and propane based mixtures, in addition to pure fluids, were used as working fluids. This study shows that the use of propane mixtures at a 265 F resource can reduce the LEC by 24% when compared to a base case value that utilizes commercial isobutane as its working fluid. The cost savings drop to 6% for a 375 F resource, where an isobutane mixture is favored. Supercritical cycles were found to have the lowest cost at all resources.

Gawlik, K.; Hassani, V. [National Renewable Energy Lab., Golden, CO (United States)

1997-12-31T23:59:59.000Z

478

Electrorheological fluid under elongation, compression, and shearing  

Science Journals Connector (OSTI)

Electrorheological (ER) fluid based on zeolite and silicone oil under elongation, compression, and shearing was investigated at room temperature. Dc electric fields were applied on the ER fluid when elongation and compression were carried out on a self-constructed test system. The shear yield stress, presenting the macroscopic interactions of particles in the ER fluid along the direction of shearing and perpendicular to the direction of the electric field, was also obtained by a HAAKE RV20 rheometer. The tensile yield stress, presenting the macroscopic interactions of particles in the ER fluid along the direction of the electric field, was achieved as the peak value in the elongating curve with an elongating yield strain of 0.150.20. A shear yield angle of about 1518.5 reasonably connected tensile yield stress with shear yield stress, agreeing with the shear yield angle tested well by other researchers. The compressing tests showed that the ER fluid has a high compressive modulus under a small compressive strain lower than 0.1. The compressive stress has an exponential relationship with the compressive strain when it is higher than 0.1, and it is much higher than shear yield stress.

Y. Tian; Y. Meng; H. Mao; S. Wen

2002-03-06T23:59:59.000Z

479

Ultrasonic fluid flow measurement method and apparatus  

DOE Patents (OSTI)

An apparatus for measuring the flow of a fluid in a pipe using ultrasonic waves. The apparatus comprises an ultrasonic generator, a lens for focusing the sound energy produced by the generator, and means for directing the focused energy into the side of the pipe through an opening and in a direction close to parallel to the long axis of the pipe. A cone carries the sound energy to the lens from the generator. Depending on the choice of materials, there may be a quarter-wave, acoustic impedance matching section between the generator and the cone to reduce the reflections of energy at the cone boundary. The lens material has an acoustic impedance similar to that of the cone material but a different sonic velocity so that the lens can converge the sound waves in the fluid. A transition section between the lens and the fluid helps to couple the energy to the fluid and assures it is directed as close to parallel to the fluid flow direction as possible.

Kronberg, James W. (108 Independent Blvd., Aiken, SC 29801)

1993-01-01T23:59:59.000Z

480

Ultrasonic fluid flow measurement method and apparatus  

DOE Patents (OSTI)

An apparatus for measuring the flow of a fluid in a pipe using ultrasonic waves. The apparatus comprises an ultrasonic generator, a lens for focusing the sound energy produced by the generator, and means for directing the focused energy into the side of the pipe through an opening and in a direction close to parallel to the long axis of the pipe. A cone carries the sound energy to the lens from the generator. Depending on the choice of materials, there may be a quarter-wave, acoustic impedance matching section between the generator and the cone to reduce the reflections of energy at the cone boundary. The lens material has an acoustic impedance similar to that of the cone material but a different sonic velocity so that the lens can converge the sound waves in the fluid. A transition section between the lens and the fluid helps to couple the energy to the fluid and assures it is directed as close to parallel to the fluid flow direction as possible. 3 figures.

Kronberg, J.W.

1993-10-12T23:59:59.000Z

Note: This page contains sample records for the topic "fluid dispersion manifolds" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Fluid-bed combustion of solid wastes  

SciTech Connect

For over ten years combustion Power Company has been conducting experimental programs and developing fluid bed systems for agencies of the federal government and for private industry and institutions. Many of these activities have involved systems for the combustion of solid waste materials. Discussed here will be three categories of programs, development of Municipal Solid Waste (MSW) fired fluid beds, development of wood waste fired fluid beds, and industrial installations. Research and development work on wood wastes has led to the design and construction of two large industrial fluid bed combustors. In one of these, a fluid bed is used for the generation of steam with a fuel that was previously suited only for landfill. Rocks and inerts are continuously removed from this combustor using a patented system. The second FBC is designed to use a variety of fuels as the source of energy to dry hog fuel for use in a high performance power boiler. Here the FBC burns green hog fuel, log yard debris, fly ash (char) from the boiler, and dried wood fines to produce a hot gas system for the wood dryer. A significant advantage of the fluidized bed reactor over conventional incinerators is its ability to reduce noxious gas emission and, finally, the fluidized bed is unique in its ability to efficiently consume low quality fuels. The relatively high inerts and moisture content of solid wastes pose no serious problem and require no associated additional devices for their removal.

Vander Molen, R.H.

1980-01-01T23:59:59.000Z

482

The Flow of Cohesionless Grains in Fluids  

Science Journals Connector (OSTI)

...magnitude of a certain 'bed load' of grains in transit...tangential stress. The bed load is independent both of...any additional suspended load and of the degree of dispersion...found with experimental data both for wind-blown...the square or the first power of the rate of shear...

1956-01-01T23:59:59.000Z

483

Effect of nanoparticle dispersion on specific heat capacity of a binary nitrate salt eutectic for concentrated solar power applications  

Science Journals Connector (OSTI)

In this study we investigate nanoparticle dispersions in a molten binary nitrate salt eutectic. It has been recently reported that nanoparticle dispersions in molten salt mixtures can significantly enhance the specific heat capacity of the salt mixtures. These molten salt mixtures can be used as heat transfer fluid (HTF)/thermal energy storage (TES) in a concentrated solar power (CSP) plant and enhancing their specific heat capacity can significantly reduce the cost of electricity produced by CSP. However, the mechanism for the enhanced specific heat capacity is still under investigation and has not been clearly explained. In this paper, we investigate the effect of nanoparticle size on the specific heat capacity of nanoparticle/molten salt eutectic mixture. Four different sizes of nanoparticles (5nm, 10nm, 30nm, and 60nm) were dispersed in a molten nitrate salt eutectic at 1% concentration by weight. The molten nitrate salt eutectic consisted of sodium nitrate (NaNO3) and potassium nitrate (KNO3) at compositions of 60% and 40% by weight. A modulated differential scanning calorimeter (MDSC) was employed to measure the specific heat capacity of the pure molten salt eutectic and the nanomaterials (pure molten salt eutectic mixed with nanoparticles). The specific heat capacity of the nanomaterials was enhanced with increase of nanoparticle size. The observed enhancement was found to be 8% for 5nm, 12% for 10nm, 19% for 30nm and 27% for the 60nm. Material characterization analyses were carried out to investigate microstructural change of the nanomaterials. It was observed that special nanostructures were formed by molten salt mixtures in the nanomaterial samples and the amount of observed nanostructures was increased with the measured specific heat capacity. This indicates that nanostructures formed in the nanomaterials may be responsible for the enhanced specific heat capacity of the nanomaterials.

Bharath Dudda; Donghyun Shin

2013-01-01T23:59:59.000Z

484

A theoretical approach for assessing the role of rock and fluid properties in the development of abnormal fluid pressures  

E-Print Network (OSTI)

and shales. The important parameters determining the extent of fluid pressure preservation are the geothermal gradient, the thermal loading rate, and the hydraulic diffusivity, K/Ss, of the rock . The highest fluid pressure development is expected... Variation of fluid expansivity and fluid compressibility with depth for a 25C/km geothermal gradient Page 14 Pressure response in different rock types and for various boundary conditions under . constant fluid mass 25 Values of or/Bf as a function...

Hastings, Thomas Worcester

2012-06-07T23:59:59.000Z

485

Dispersion of concentrated aqueous neodymiayttriaalumina mixture with ammonium poly(acrylic acid) as dispersant  

Science Journals Connector (OSTI)

A stable aqueous slurry using ammonium polyacrylic acid polyelectrolyte as dispersant and a neodymiayttriaalumina mixture was prepared as the starting powder. The effect of the polyelectrolyte concentration and the pH of the slurry on the stability of the suspension is studied, and the optimal pH value and the amount of dispersant needed to obtain a stable slurry were determined. Highly consistent slurries with optimal pH and dispersant concentration were prepared by ball milling. The rheological behavior of the slip with different solid loading (4858wt.%) has been studied by measuring the viscosity and shear stress as a function of shear rate. Slip with solid loadings of 53wt.% shows near-Newtonian behavior but becomes non-Newtonian with typical shear-thinning behavior above this solid loading value. The density and microstructure of the cast product bears a direct relationship to the state of the slip induced by variation of the pH and the concentration of the dispersant as well as by solid loading. Transparent Nd:YAG ceramics were obtained by sintering of compacts prepared from optimized slurries at 1750C in vacuum.

Yaohui Lv; Wei Zhang; Jie Tan; Yuanhua Sang; Haiming Qin; Jinlian Hu; Liuniu Tong; Hong Liu; Jiyang Wang; Robert I Boughton

2011-01-01T23:59:59.000Z

486

High-Energy-Density Plasmas, Fluids  

NLE Websites -- All DOE Office Websites (Extended Search)

High-Energy-Density Plasmas, Fluids High-Energy-Density Plasmas, Fluids /science-innovation/_assets/images/icon-science.jpg High-Energy-Density Plasmas, Fluids National security depends on science and technology. The United States relies on Los Alamos National Laboratory for the best of both. No place on Earth pursues a broader array of world-class scientific endeavors. TRIDENT target chamber Sasi Palaniyappan, right, and Rahul Shah left inside a target chamber where the TRIDENT short pulse laser is aimed at a very thin diamond- foil target, a fraction of a micrometer thick. The laser delivers a power on target of 150 Terawatts focused into a 7 micrometer spot, yielding laser brilliance over 100 times more intense than needed to make the target electrons fully relativistic. These experiments test novel methods of producing intense

487

Thermal Fluid Multiphysics Optimization of Spherical Tokamak  

SciTech Connect

An experimental Fusion Nuclear Science Facility (FNSF) is required that will create the environment that simultaneously achieves high energy neutrons and high ion fluence necessary in order to bridge the gaps from ITER to the realization of a fusion nuclear power plant. One concept for achieving this is a high duty cycle spherical torus. This study will focus on thermal modeling of the spherical torus centerpost using computational fluid dynamics to effectively model the thermal transfer of the cooling fluid to the centerpost. The design of the fluid channels is optimized in order to minimize the temperature in the centerpost. Results indicate the feasibility of water cooling for a long-pulse spherical torus FNSF.

Lumsdaine, Arnold [ORNL; Tipton, Joseph B [ORNL; Peng, Yueng Kay Martin [ORNL

2012-01-01T23:59:59.000Z

488

Carbon-bearing fluids at nanoscale interfaces  

SciTech Connect

The behaviour of fluids at mineral surfaces or in confined geometries (pores, fractures) typically differs from their bulk behaviour in many ways due to the effects of large internal surfaces and geometrical confinement. We summarize research performed on C-O-H fluids at nanoscale interfaces in materials of interest to the earth and material sciences (e.g., silica, alumina, zeolites, clays, rocks, etc.), emphasizing those techniques that assess microstructural modification and/or dynamical behaviour such as gravimetric analysis, small-angle (SANS) neutron scattering, and nuclear magnetic resonance (NMR). Molecular dynamics (MD) simulations will be described that provide atomistic characterization of interfacial and confined fluid behaviour as well as aid in the interpretation of the neutron scattering results.

Cole, David [Ohio State University; Ok, Salim [Ohio State University, Columbus; Phan, A [Ohio State University, Columbus; Rother, Gernot [ORNL; Striolo, Alberto [Oklahoma University; Vlcek, Lukas [ORNL

2013-01-01T23:59:59.000Z

489

Detecting low levels of radionuclides in fluids  

DOE Patents (OSTI)

An apparatus and method for detecting low levels of one or more radionuclides in a fluid sample uses a substrate that includes an ion exchange resin or other sorbent material to collect the radionuclides. A collecting apparatus includes a collecting chamber that exposes the substrate to a measured amount of the fluid sample such that radionuclides in the fluid sample are collected by the ion exchange resin. A drying apparatus, which can include a drying chamber, then dries the substrate. A measuring apparatus measures emissions from radionuclides collected on the substrate. The substrate is positioned in a measuring chamber proximate to a detector, which provides a signal in response to emissions from the radionuclides. Other analysis methods can be used to detect non-radioactive analytes, which can be collected with other types of sorbent materials.

Patch, Keith D. (Lexington, MA); Morgan, Dean T. (Sudbury, MA)

2000-01-01T23:59:59.000Z

490

Convective heat transfer in the vertical channel flow of a clear fluid adjacent to a nanofluid layer: a two-fluid model  

Science Journals Connector (OSTI)

A two-fluid vertical channel flow and convective heat transfer model in which one of the two fluids is a nanofluid demonstrates that the nanofluid can modify the fluid velocity at the interface of the two fluids,...

Robert A. Van Gorder; K. V. Prasad; K. Vajravelu

2012-07-01T23:59:59.000Z

491

The Geometric Structure of Complex Fluids  

E-Print Network (OSTI)

This paper develops the theory of affine Euler-Poincar\\'e and affine Lie-Poisson reductions and applies these processes to various examples of complex fluids, including Yang-Mills and Hall magnetohydrodynamics for fluids and superfluids, spin glasses, microfluids, and liquid crystals. As a consequence of the Lagrangian approach, the variational formulation of the equations is determined. On the Hamiltonian side, the associated Poisson brackets are obtained by reduction of a canonical cotangent bundle. A Kelvin-Noether circulation theorem is presented and is applied to these examples.

Franois Gay-Balmaz; Tudor S. Ratiu

2009-03-25T23:59:59.000Z

492

Geomechanical Simulation of Fluid-Driven Fractures  

SciTech Connect

The project supported graduate students working on experimental and numerical modeling of rock fracture, with the following objectives: (a) perform laboratory testing of fluid-saturated rock; (b) develop predictive models for simulation of fracture; and (c) establish educational frameworks for geologic sequestration issues related to rock fracture. These objectives were achieved through (i) using a novel apparatus to produce faulting in a fluid-saturated rock; (ii) modeling fracture with a boundary element method; and (iii) developing curricula for training geoengineers in experimental mechanics, numerical modeling of fracture, and poroelasticity.

Makhnenko, R.; Nikolskiy, D.; Mogilevskaya, S.; Labuz, J.

2012-11-30T23:59:59.000Z

493

Homothetic perfect fluid space-times  

E-Print Network (OSTI)

A brief summary of results on homotheties in General Relativity is given, including general information about space-times admitting an r-parameter group of homothetic transformations for r>2, as well as some specific results on perfect fluids. Attention is then focussed on inhomogeneous models, in particular on those with a homothetic group $H_4$ (acting multiply transitively) and $H_3$. A classification of all possible Lie algebra structures along with (local) coordinate expressions for the metric and homothetic vectors is then provided (irrespectively of the matter content), and some new perfect fluid solutions are given and briefly discussed.

J. Carot; A. M. Sintes

1996-07-24T23:59:59.000Z

494

Vibration of Nanoparticles in Viscous Fluids  

Science Journals Connector (OSTI)

In this article, we present results of a rigorous finite-element analysis and commensurate scaling theory that enable interpretation and analysis of these experiments, for the extensional vibrational modes of axisymmetric nanoparticles immersed in viscous fluids. ... (51) Vibration of the particle accelerates the fluid, which increases the effective mass of the vibrating particle. ... Using low-frequency Raman scattering, the authors clearly demonstrate that single-domain NCs vibrate differently than their multiply twinned counterparts, through the splitting of the quadrupolar vibrations, which is only obsd. ...

Debadi Chakraborty; Emma van Leeuwen; Matthew Pelton; John E. Sader

2013-03-21T23:59:59.000Z

495

Friction-Induced Fluid Heating in Nanoscale Helium Flows  

SciTech Connect

We investigate the mechanism of friction-induced fluid heating in nanoconfinements. Molecular dynamics simulations are used to study the temperature variations of liquid helium in nanoscale Poiseuille flows. It is found that the fluid heating is dominated by different sources of friction as the external driving force is changed. For small external force, the fluid heating is mainly caused by the internal viscous friction in the fluid. When the external force is large and causes fluid slip at the surfaces of channel walls, the friction at the fluid-solid interface dominates over the internal friction in the fluid and is the major contribution to fluid heating. An asymmetric temperature gradient in the fluid is developed in the case of nonidentical walls and the general temperature gradient may change sign as the dominant heating factor changes from internal to interfacial friction with increasing external force.

Li Zhigang [Department of Mechanical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)

2010-05-21T23:59:59.000Z

496

Short communication Study of pollution dispersion in urban areas using  

E-Print Network (OSTI)

of the Reynolds numbers covers the laminar, transitional and part of the turbulent regimes of the flow (CFD) and Geographic Information System (GIS) A.K.M. Chua , R.C.W. Kwokb , K.N. Yua, * a Department rights reserved. Keywords: Street canyons; Computational Fluid Dynamics; CFD; CFX; Geographic Information

Yu, K.N.

497

Method and apparatus for chemically altering fluids in continuous flow  

DOE Patents (OSTI)

The present invention relates to a continuous flow fluid reactor for chemically altering fluids. The reactor operates on standard frequency (50 to 60 Hz) electricity. The fluid reactor contains particles that are energized by the electricity to form a corona throughout the volume of the reactor and subsequently a non-equilibrium plasma that interacts with the fluid. Particles may form a fixed bed or a fluid bed. Electricity may be provided through electrodes or through an inductive coil. Fluids include gases containing exhaust products and organic fuels requiring oxidation.

Heath, William O. (Richland, WA); Virden, Jr., Judson W. (Richland, WA); Richardson, R. L. (West Richland, WA); Bergsman, Theresa M. (Richland, WA)

1993-01-01T23:59:59.000Z

498

Method and apparatus for chemically altering fluids in continuous flow  

DOE Patents (OSTI)

The present invention relates to a continuous flow fluid reactor for chemically altering fluids. The reactor operates on standard frequency (50 to 60 Hz) electricity. The fluid reactor contains particles that are energized by the electricity to form a corona throughout the volume of the reactor and subsequently a non-equilibrium plasma that interacts with the fluid. Particles may form a fixed bed or a fluid bed. Electricity may be provided through electrodes or through an inductive coil. Fluids include gases containing exhaust products and organic fuels requiring oxidation. 4 figures.

Heath, W.O.; Virden, J.W. Jr.; Richardson, R.L.; Bergsman, T.M.

1993-10-19T23:59:59.000Z

499

Stabilization of Hydrophobic Colloidal Dispersions in Water with Amphiphilic Polymers: Application to Integral  

E-Print Network (OSTI)

amphiphilic polymers ("amphipols"). These polymers, derived from poly(acrylic acid), adsorb onto the particleStabilization of Hydrophobic Colloidal Dispersions in Water with Amphiphilic Polymers: Application dispersions of highly hydrophobic colloidal particlesshere three integral membrane proteins of nanometric

500

Dispersion of Small Ceramic Particles (Al2O3) with Azotobacter vinelandii  

Science Journals Connector (OSTI)

...between particles, may be used as a dispersant. Currently, synthetic polymers from petrochemi- cals, such as polymethacrylic acid (PMAA) and polyacrylic acid (PAA), are used as dispersants (5, 6). However, com- mercial PMAA...

Tao Ren; Nancy B. Pellerin; Gordon L. Graff; Ilhan A. Aksay; James T. Staley

1992-09-01T23:59:59.000Z