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1

Interface effects on multiphase flows in porous media  

Science Conference Proceedings (OSTI)

Most models for multiphase flows in a porous medium are based on the straightforward extension of Darcy's law, in which each fluid phase is driven by its own pressure gradient. The pressure difference between the phases is thought to be an effect of surface tension and is called capillary pressure. Independent of Darcy's law, for liquid imbibition processes in a porous material, diffusion models are sometime used. In this paper, an ensemble phase averaging technique for continuous multi phase flows is applied to derive averaged equations and to examine the validity of the commonly used models. The closure for the averaged equations is quite complicated for general multiphase flows in a porous material. For flows with a small ratio of the characteristic length of the phase interfaces to the macroscopic length, the closure relations can be simplified significantly by an approximation with a second order error in the length ratio. The approximation reveals the information of the length scale separation obscured during the ensemble averaging process, and leads to an equation system similar to Darcy's law, but with additional terms. Based on interactions on phase interfaces, relations among closure quantities are studied.

Zhang, Duan Z [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

2

The Open-Access Journal for the Basic Principles of Diffusion Theory, Experiment and Application Application of Low Field and Solid-State NMR Spectroscopy to Study the Liquid/Liquid Interface in Porous Space of Clay Minerals and Shales  

E-Print Network (OSTI)

In petroleum research understanding displacement, redistribution, and adsorption of oil and water plays an important role. To study complex multi-component systems such as liquid/liquid/mineral interactions in the porous space of clays and shales we applied low field (2 – 15 MHz) and high resolution (300 MHz) NMR spectroscopy. The detailed NMR analysis shows that the results from low field NMR measurements are in good correlation with the solid-state data. Consequently the process of liquid/liquid displacement can be characterised by considering the relaxation times, signal amplitudes and chemical shifts together.

Artem Borysenko; Ben Clennell; Iko Burgar; David Dewhurst; Rossen Sedev; John Ralston

2008-01-01T23:59:59.000Z

3

Ion Distributions Near a Liquid-Liquid Interface  

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

Ion Distributions Near a Liquid-Liquid Interface Ion Distributions Near a Liquid-Liquid Interface Researchers from the University of Illinois at Chicago; Northern Illinois University; the University of California, Santa Cruz; and ChemMatCARS (sector 15 at the APS) used x-ray reflectivity from ion distributions at the liquid-liquid interface to provide strong evidence that the interfacial structure of a liquid alters the ion distributions near a charged interface, contrary to earlier theories about ions at charged surfaces. Coulomb's Law describes the interaction between two, otherwise isolated, point charges. If many charges are present in the region between these two charges, the net interaction between them is modified. This is commonly found in real systems, such as a plasma gas of electrons and ionized

4

Conductive porous scaffolds as potential neural interface materials.  

SciTech Connect

Our overall intent is to develop improved prosthetic devices with the use of nerve interfaces through which transected nerves may grow, such that small groups of nerve fibers come into close contact with electrode sites, each of which is connected to electronics external to the interface. These interfaces must be physically structured to allow nerve fibers to grow through them, either by being porous or by including specific channels for the axons. They must be mechanically compatible with nerves such that they promote growth and do not harm the nervous system, and biocompatible to promote nerve fiber growth and to allow close integration with biological tissue. They must exhibit selective and structured conductivity to allow the connection of electrode sites with external circuitry, and electrical properties must be tuned to enable the transmission of neural signals. Finally, the interfaces must be capable of being physically connected to external circuitry, e.g. through attached wires. We have utilized electrospinning as a tool to create conductive, porous networks of non-woven biocompatible fibers in order to meet the materials requirements for the neural interface. The biocompatible fibers were based on the known biocompatible material poly(dimethyl siloxane) (PDMS) as well as a newer biomaterial developed in our laboratories, poly(butylene fumarate) (PBF). Both of the polymers cannot be electrospun using conventional electrospinning techniques due to their low glass transition temperatures, so in situ crosslinking methodologies were developed to facilitate micro- and nano-fiber formation during electrospinning. The conductivity of the electrospun fiber mats was controlled by controlling the loading with multi-walled carbon nanotubes (MWNTs). Fabrication, electrical and materials characterization will be discussed along with initial in vivo experimental results.

Hedberg-Dirk, Elizabeth L.; Cicotte, Kirsten N.; Buerger, Stephen P.; Reece, Gregory; Dirk, Shawn M.; Lin, Patrick P.

2011-11-01T23:59:59.000Z

5

A new Diffractometer for Studies of Liquid-Liquid Interfaces  

SciTech Connect

We have designed a novel, dedicated diffractometer for surface x-ray scattering studies of liquid-liquid and liquid-gas interfaces for the PETRA III High Resolution Diffraction Beamline. Using a double crystal beam-tilter in Bragg geometry this new instrument enables reflectivity and grazing incidence diffraction investigations without moving the sample, which is mechanically decoupled from the rest of the diffractometer. This design minimizes external excitation of surface vibrations, a key prerequisite for studies of liquid interfaces. The instrument operates over the energy range 6.4 keV to 30 keV, the higher energy range being optimal for penetration through liquid sample environments. Vertical momentum transfer up to q{sub z} 2.5 A{sup -1} and lateral q{sub ||} up to 4 A{sup -1}will be available.

Murphy, B. M.; Greve, M.; Runge, B.; Koops, C. T.; Elsen, A.; Stettner, J.; Magnussen, O. M. [IEAP, Christian-Albrechts-Universitaet zu Kiel, D-24098 Kiel (Germany); Seeck, O. H. [PETRA III at DESY, Notkestr. 85, D-22603 Hamburg (Germany)

2010-06-23T23:59:59.000Z

6

Systems and methods for monitoring a solid-liquid interface  

DOE Patents (OSTI)

Systems and methods are provided for monitoring a solid-liquid interface during a casting process. The systems and methods enable determination of the location of a solid-liquid interface during the casting process.

Stoddard, Nathan G; Lewis, Monte A.; Clark, Roger F

2013-06-11T23:59:59.000Z

7

Relationships between gas-liquid interfacial surface area, liquid saturation, and light transmission in variably saturated porous media  

E-Print Network (OSTI)

Relationships between gas-liquid interfacial surface area, liquid saturation, and light transmission in variably saturated porous media Abstract Liquid saturation and gas-liquid interfacial area the specific gas-liquid interfacial area from the area under the primarydrainage branch of the Seff -h

Weisbrod, Noam

8

Methods and systems for monitoring a solid-liquid interface  

DOE Patents (OSTI)

Methods and systems are provided for monitoring a solid-liquid interface, including providing a vessel configured to contain an at least partially melted material; detecting radiation reflected from a surface of a liquid portion of the at least partially melted material that is parallel with the liquid surface; measuring a disturbance on the surface; calculating at least one frequency associated with the disturbance; and determining a thickness of the liquid portion based on the at least one frequency, wherein the thickness is calculated based on.times. ##EQU00001## where g is the gravitational constant, w is the horizontal width of the liquid, and f is the at least one frequency.

Stoddard, Nathan G. (Gettysburg, PA); Clark, Roger F. (Frederick, MD); Kary, Tim (Union Bridge, MD)

2010-07-20T23:59:59.000Z

9

Structure and Depletion at Fluoro- and Hydro-carbon/Water Liquid/Liquid Interfaces  

E-Print Network (OSTI)

The results of x-ray reflectivity studies of two oil/water (liquid/liquid) interfaces are inconsistent with recent predictions of the presence of a vapor-like depletion region at hydrophobic/aqueous interfaces. One of the oils, perfluorohexane, is a fluorocarbon whose super-hydrophobic interface with water provides a stringent test for the presence of a depletion layer. The other oil, heptane, is a hydrocarbon and, therefore, is more relevant to the study of biomolecular hydrophobicity. These results are consistent with the sub-angstrom proximity of water to soft hydrophobic materials.

Kaoru Kashimoto; Jaesung Yoon; Binyang Hou; Chiu-hao Chen; Binhua Lin; Makoto Aratono; Takanori Takiue; Mark L. Schlossman

2008-07-18T23:59:59.000Z

10

Liquid-liquid interfaces of semifluorinated alkane diblock copolymers with water, alkanes, and perfluorinated alkanes.  

DOE Green Energy (OSTI)

The liquid-liquid interface between semifluorinated alkane diblock copolymers of the form F3C(CF2)n-1-(CH2)m-1CH3 and water, protonated alkanes, and perfluorinated alkanes are studied by fully atomistic molecular dynamics simulations. A modified version of the OPLS-AA (Optimized Parameter for Liquid Simulation All-Atom) force field of Jorgensen et al. has been used to study the interfacial behavior of semifluorinated diblocks. Aqueous interfaces are found to be sharp, with correspondingly large values of the interfacial tension. Due to the reduced hydrophobicity of the protonated block compared to the fluorinated block, hydrogen enhancement is observed at the interface. Water dipoles in the interfacial region are found to be oriented nearly parallel to the liquid-liquid interface. A number of protonated alkanes and perfluorinated alkanes are found to be mutually miscible with the semifluorinated diblocks. For these liquids, interdiffusion follows the expected Fickian behavior, and concentration-dependent diffusivities are determined.

Perahia, Dvora, Dr. (Clemson University, Clemson, SC); Pierce, Flint (Clemson University, Clemson, SC); Tsige, Mesfin (Southern Illinois University, Carbondale, IL); Grest, Gary Stephen, Dr.

2008-08-01T23:59:59.000Z

11

Methods and systems for monitoring a solid-liquid interface  

DOE Patents (OSTI)

Methods and systems are provided for monitoring a solid-liquid interface, including providing a vessel configured to contain an at least partially melted material; detecting radiation reflected from a surface of a liquid portion of the at least partially melted material; providing sound energy to the surface; measuring a disturbance on the surface; calculating at least one frequency associated with the disturbance; and determining a thickness of the liquid portion based on the at least one frequency, wherein the thickness is calculated based on L=(2m-1)v.sub.s/4f, where f is the frequency where the disturbance has an amplitude maximum, v.sub.s is the speed of sound in the material, and m is a positive integer (1, 2, 3, . . . ).

Stoddard, Nathan G. (Gettysburg, PA); Clark, Roger F. (Frederick, MD)

2011-10-04T23:59:59.000Z

12

Analyses of interface adhesion between porous SiO2 low-k film and SiC/SiN layers by nanoindentation and nanoscratch tests  

Science Conference Proceedings (OSTI)

In this study, the interface adhesion between porous SiO"2 low-dielectric-constant film and SiN capping layer as well as SiC etch stop layer has been investigated. The SiN capping layer was found mostly composed of Si to N bonds, and the porous SiO"2 ... Keywords: Bonding configuration, Dielectrics, Interface adhesion

Shou-Yi Chang; Yi-Chung Huang

2007-02-01T23:59:59.000Z

13

Liquid chromatography/Fourier transform IR spectrometry interface flow cell  

DOE Patents (OSTI)

A zero dead volume (ZDV) microbore high performance liquid chromatography (.mu.HPLC)/Fourier transform infrared (FTIR) interface flow cell includes an IR transparent crystal having a small diameter bore therein through which a sample liquid is passed. The interface flow cell further includes a metal holder in combination with a pair of inner, compressible seals for directly coupling the thus configured spectrometric flow cell to the outlet of a .mu.HPLC column end fitting to minimize the transfer volume of the effluents exiting the .mu.HPLC column which exhibit excellent flow characteristics due to the essentially unencumbered, open-flow design. The IR beam passes transverse to the sample flow through the circular bore within the IR transparent crystal, which is preferably comprised of potassium bromide (KBr) or calcium fluoride (CaF.sub.2), so as to minimize interference patterns and vignetting encountered in conventional parallel-plate IR cells. The long IR beam pathlength and lensing effect of the circular cross-section of the sample volume in combination with the refractive index differences between the solvent and the transparent crystal serve to focus the IR beam in enhancing sample detection sensitivity by an order of magnitude.

Johnson, Charles C. (Fairfield, OH); Taylor, Larry T. (Blacksburg, VA)

1986-01-01T23:59:59.000Z

14

Liquid chromatography/Fourier transform IR spectrometry interface flow cell  

DOE Patents (OSTI)

A zero dead volume (ZDV) microbore high performance liquid chromatography (..mu.. HPLC)/Fourier transform infrared (FTIR) interface flow cell includes an IR transparent crystal having a small diameter bore therein through which a sample liquid is passed. The interface flow cell further includes a metal holder in combination with a pair of inner, compressible seals for directly coupling the thus configured spectrometric flow cell to the outlet of a ..mu.. HPLC column end fitting to minimize the transfer volume of the effluents exiting the ..mu.. HPLC column which exhibit excellent flow characteristics due to the essentially unencumbered, open-flow design. The IR beam passes transverse to the sample flow through the circular bore within the IR transparent crystal, which is preferably comprised of potassium bromide (KBr) or calcium fluoride (CaF/sub 2/), so as to minimize interference patterns and vignetting encountered in conventional parallel-plate IR cells. The long IR beam pathlength and lensing effect of the circular cross-section of the sample volume in combination with the refractive index differences between the solvent and the transparent crystal serve to focus the IR beam in enhancing sample detection sensitivity by an order of magnitude.

Johnson, C.C.; Taylor, L.T.

1985-01-04T23:59:59.000Z

15

Microsoft PowerPoint - S05-05_Zapp_Liquid Air Interface.ppt  

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

Liquid-Air Interface Corrosion Studies at SRS Liquid-Air Interface Corrosion Studies at SRS EM Waste Processing Technical Exchange 2010 Philip E. Zapp Savannah River National Laboratory November 17, 2010 SRNL-STI-2010-00695 Print Close 2 Liquid-Air Interface Corrosion Studies at SRS SRNL-STI-2010-00695 Introduction Pitting Corrosion in Carbon Steel Waste Tanks Pitting Induced by Dilute Waste Solutions Dilution for feed preparation for vitrification; waste removal Focus: Pitting Susceptibility at Liquid-Air Interface Service Experience Hydroxide Depletion Model Type III tanks under constr. Tank with ventilation & cooling equip. Print Close 3 Liquid-Air Interface Corrosion Studies at SRS SRNL-STI-2010-00695 Background Pitting in carbon steel at and above liquid-air interface in dilute wastes ([Nitrate] < 1 M)

16

Influence of Solid-Liquid-Liquid Interactions on Multiphase Transport Behavior in Porous Media  

Science Conference Proceedings (OSTI)

The flow of oil, water and gas in the complex network of paths in petroleum reservoir rocks constitutes probably the most complex embodiment of interfacial interactions and their consequences on multiphase transport behavior in porous media. The fact ...

Dandina N. Rao; Subhash C. Ayirala

2005-07-01T23:59:59.000Z

17

Effects of capillary heterogeneity on vapor-liquid counterflow in porous media  

DOE Green Energy (OSTI)

Based on a continuum description, the effect of capillary heterogeneity, induced by variation in permeability, on the steady state, countercurrent, vapor-liquid flow in porous media is analyzed. It is shown that the heterogeneity acts as a body force, that may enhance or diminish gravity effects on heat pipes. Selection rules that determine the steady states reached in homogeneous, gravity-driven heat pipes are also formulated. It is shown that the ``infinite`` two-phase zone may terminate by a substantial change in the permeability somewhere in the medium. The two possible sequences, liquid - liquid dominated - dry, or liquid - vapor dominated - dry find applications in geothermal systems. Finally, it is shown that although weak heterogeneity affects only gravity controlled flows, stronger variations in permeability can give rise to significant capillary effects.

Stubos, A.K.; Satik, C.; Yortsos, Y.C.

1992-06-01T23:59:59.000Z

18

Effects of capillary heterogeneity on vapor-liquid counterflow in porous media  

DOE Green Energy (OSTI)

Based on a continuum description, the effect of capillary heterogeneity, induced by variation in permeability, on the steady state, countercurrent, vapor-liquid flow in porous media is analyzed. It is shown that the heterogeneity acts as a body force, that may enhance or diminish gravity effects on heat pipes. Selection rules that determine the steady states reached in homogeneous, gravity-driven heat pipes are also formulated. It is shown that the infinite'' two-phase zone may terminate by a substantial change in the permeability somewhere in the medium. The two possible sequences, liquid - liquid dominated - dry, or liquid - vapor dominated - dry find applications in geothermal systems. Finally, it is shown that although weak heterogeneity affects only gravity controlled flows, stronger variations in permeability can give rise to significant capillary effects.

Stubos, A.K.; Satik, C.; Yortsos, Y.C.

1992-06-01T23:59:59.000Z

19

Thermal conductance of solid-liquid interfaces Scott Huxtable, Zhenbin Ge, David G. Cahill  

E-Print Network (OSTI)

-liquid interfaces: Two approaches · Transient optical absorption of nanoparticles and nanotubes in liquid substrate. #12;Nanotubes in surfactant in water: Transient absorption · Optical absorption depends · Cooling rate (RC time constant) gives interface conductance G = 12 MW m-2 K-1G = 12 MW m K #12;Application

Braun, Paul

20

Heat transfer modeling at an interface between a porous medium and a free region.  

E-Print Network (OSTI)

??This work deals with the study of heat transfer between a porous medium and a free medium, using multi scale approaches. First, we derive the… (more)

D'hueppe, Aliénor

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Effect of plasma treatments on interface chemistry and adhesion strength between porous SiO2 low-k film and SiC/SiN layers  

Science Conference Proceedings (OSTI)

In this study, the interface chemistry and adhesion strengths between porous SiO"2 low-dielectric-constant film and SiN capping layer as well as SiC etch stop layer have been investigated under different plasma treatments. Elements of Si, O, and N constructed ... Keywords: Bonding configuration, Dielectrics, Interface adhesion

Shou-Yi Chang; Yi-Chung Huang

2008-02-01T23:59:59.000Z

22

[Electron transfer rates at semiconductor/liquid interfaces]. Progress report  

DOE Green Energy (OSTI)

Work has focused on several aspects of the fundamental chemistry and physics semiconductor/liquid junction behavior. These projects have been directed primarily towards GaAs/liquid contacts, because GaAs/liquid systems provide high energy conversion efficiencies and offer an opportunity to gain mechanistic understanding of the factors that are important to control in an efficient photoelectrochemical energy conversion system.

Lewis, N.S.

1992-08-01T23:59:59.000Z

23

(Electron transfer rates at semiconductor/liquid interfaces)  

DOE Green Energy (OSTI)

Work has focused on several aspects of the fundamental chemistry and physics semiconductor/liquid junction behavior. These projects have been directed primarily towards GaAs/liquid contacts, because GaAs/liquid systems provide high energy conversion efficiencies and offer an opportunity to gain mechanistic understanding of the factors that are important to control in an efficient photoelectrochemical energy conversion system.

Lewis, N.S.

1992-01-01T23:59:59.000Z

24

Dynamic coupling between a multistable defect pattern and flow in nematic liquid crystals confined in a porous medium  

E-Print Network (OSTI)

When a nematic liquid crystal is confined in a porous medium with strong anchoring conditions, topological defects, called disclinations, are stably formed with numerous possible configurations. Since the energy barriers between them are large enough, the system shows multistability. Our lattice Boltzmann simulations demonstrate dynamic couplings between the multistable defect pattern and the flow in a regular porous matrix. At sufficiently low flow speed, the topological defects are pinned at the quiescent positions. As the flow speed is increased, the defects show cyclic motions and nonlinear rheological properties, which depend on whether or not they are topologically constrained in the porous networks. In addition, we discovered that the defect pattern can be controlled by controlling the flow. Thus, the flow path is recorded in the porous channels owing to the multistability of the defect patterns.

Takeaki Araki

2012-12-17T23:59:59.000Z

25

Solute Redistribution, Liquid/Solid Interface Instability, and Initial ...  

Science Conference Proceedings (OSTI)

A Coupled CFD-Thermodynamic-Kinetic Model to Simulate a Gas Stirred Ladle ... Exercise on Thermal and Thermosolutal Natural Convection in Liquid Alloys.

26

Microsoft PowerPoint - S05-07_Varona_Solid-Liquid Waste Interface.pptx  

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

Liquid Interface Monitor Liquid Interface Monitor (SLIM) Jose Varona D. Roelant, A. Awwad, D. McDaniel Florida International University's Applied Research Center EM Waste Processing Technical Exchange November 17, 2010 Print Close Disclaimer This presentation was prepared as an account of work sponsored by an agency of the United States government (Department of Energy, Office of Environmental Management, under Grant No. DE-FG01-05EW07033). Neither the United States government nor any agency thereof, nor any of their employees, nor any of its contractors, subcontractors, nor their employees makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness,

27

Economizer Based Data Center Liquid Cooling with Advanced Metal Interfaces  

Science Conference Proceedings (OSTI)

A new chiller-less data center liquid cooling system utilizing the outside air environment has been shown to achieve up to 90% reduction in cooling energy compared to traditional chiller based data center cooling systems. The system removes heat from Volume servers inside a Sealed Rack and transports the heat using a liquid loop to an Outdoor Heat Exchanger which rejects the heat to the outdoor ambient environment. The servers in the rack are cooled using a hybrid cooling system by removing the majority of the heat generated by the processors and memory by direct thermal conduction using coldplates and the heat generated by the remaining components using forced air convection to an air- to- liquid heat exchanger inside the Sealed Rack. The anticipated benefits of such energy-centric configurations are significant energy savings at the data center level. When compared to a traditional 10 MW data center, which typically uses 25% of its total data center energy consumption for cooling this technology could potentially enable a cost savings of up to $800,000-$2,200,000/year (assuming electricity costs of 4 to 11 cents per kilowatt-hour) through the reduction in electrical energy usage.

Timothy Chainer

2012-11-30T23:59:59.000Z

28

Interface Width and Bulk Stability: requirements for the simulation of Deeply Quenched Liquid-Gas Systems  

E-Print Network (OSTI)

Simulations of liquid-gas systems with extended interfaces are observed to fail to give accurate results for two reasons: the interface can get ``stuck'' on the lattice or a density overshoot develops around the interface. In the first case the bulk densities can take a range of values, dependent on the initial conditions. In the second case inaccurate bulk densities are found. In this communication we derive the minimum interface width required for the accurate simulation of liquid gas systems with a diffuse interface. We demonstrate this criterion for lattice Boltzmann simulations of a van der Waals gas. When combining this criterion with predictions for the bulk stability we can predict the parameter range that leads to stable and accurate simulation results. This allows us to identify parameter ranges leading to high density ratios of over 1000. This is despite the fact that lattice Boltzmann simulations of liquid-gas systems were believed to be restricted to modest density ratios of less than 20.

A. J. Wagner; C. M. Pooley

2007-06-11T23:59:59.000Z

29

NANO-SCALE VISUALIZATION OF LIQUID INTERFACES DURING COALESCENCE AND RAPTURE  

E-Print Network (OSTI)

NANO-SCALE VISUALIZATION OF LIQUID INTERFACES DURING COALESCENCE AND RAPTURE Experiments by Jacob viscosity and interfacial tension) and experimental conditions (shear rate or approach velocity), and nano such as fingering and cavitation, both occurring at the nano- or submicron-scales. The two figures below ­ the first

Akhmedov, Azer

30

Vertically-Vibrated Gas-Liquid Interfaces: Surface Deformation and Breakup  

E-Print Network (OSTI)

In his pioneering work of 1831, Faraday demonstrated that a vertically vibrated gas-liquid interface exhibits a period-doubling bifurcation from a flat state to a wavy configuration at certain frequencies or amplitudes. Typical experiments performed using thin layers of water produce "Faraday ripples", modest-amplitude nonlinear standing waves. Later experiments by Hashimoto and Sudo (1980) and Jameson (1966) as well as those performed in the present study show that much more dramatic disturbances can be generated at the gas-liquid free surface under certain ranges of vibration conditions. This breakup mechanism was examined experimentally using deep layers of polydimethylsiloxane (PDMS) silicone oils over a range of viscosity and sinusoidal, primarily axial vibration conditions that can produce dramatic disturbances at the gas-liquid free surface. Large-amplitude vibrations produce liquid jets into the gas, droplets pinching off from the jets, gas cavities in the liquid from droplet impact, and bubble transp...

O'Hern, T J; Brooks, C F; Shelden, B; Torczynski, J R; Kraynik, A M; Romero, L A; Benavides, G L

2010-01-01T23:59:59.000Z

31

Modeling of ultrasound transmission through a solid-liquid interface comprising a network of gas pockets  

SciTech Connect

Ultrasonic inspection of sodium-cooled fast reactor requires a good acoustic coupling between the transducer and the liquid sodium. Ultrasonic transmission through a solid surface in contact with liquid sodium can be complex due to the presence of microscopic gas pockets entrapped by the surface roughness. Experiments are run using substrates with controlled roughness consisting of a network of holes and a modeling approach is then developed. In this model, a gas pocket stiffness at a partially solid-liquid interface is defined. This stiffness is then used to calculate the transmission coefficient of ultrasound at the entire interface. The gas pocket stiffness has a static, as well as an inertial component, which depends on the ultrasonic frequency and the radiative mass.

Paumel, K.; Baque, F. [CEA, DEN, Nuclear Technology Department, F-13108 Saint-Paul-lez-Durance (France); Moysan, J.; Corneloup, G. [Laboratoire de Caracterisation Non Destructive, Universite de la Mediterranee, IUT Aix-en-Provence, Avenue Gaston Berger, 13625 Aix-en-Provence (France); Chatain, D. [CNRS, Aix-Marseille Universite, CINAM-UPR3118, Campus de Luminy, Case 913, 13288 Marseille cedex 09 (France)

2011-08-15T23:59:59.000Z

32

Structure of gas-liquid interface and hydrophobic interface for urea aqueous solution: a computer simulation study  

E-Print Network (OSTI)

Urea aqueous solution is ubiquitously used to denature protein. Regardless of its extensive use, the mechanism is still unclear and remains an active field of study. There have been two proposed mechanisms, the direct and indirect. The indirect mechanism, which attributes the ability of urea of changing water structure, is susceptible since many research works show that there is little effect of urea on water structure. The current study provided evidence for the indirect mechanism by demonstrating that the introduction of urea slightly changes the water structure in the hydrophobic interfacial areas. In the current study, the urea aqueous solution systems with either gas-liquid or hydrophobic interface are studied by MD simulations, and the structures of water near the interfacial areas are analyzed in terms of density, orientation and number of hydrogen bonds. For each kind of interface, systems with four different urea concentrations are included, ranging from 0M to 8M. The results show slight change of water structure by the urea solute on the hydrophobic interface in terms of the orientation and number of hydrogen bonds per water molecule.

Yu, Meng

2008-05-01T23:59:59.000Z

33

Simulation and Theory of Ions at Atmospherically Relevant Aqueous Liquid-Air Interfaces  

E-Print Network (OSTI)

Chemistry occurring at or near the surfaces of aqueous droplets and thin films in the atmosphere influences air quality and climate. Molecular dynamics simulations are becoming increasingly useful for gaining atomic-scale insight into the structure and reactivity of aqueous interfaces in the atmosphere. Here we review simulation studies of atmospherically relevant aqueous liquid-air interfaces, with an emphasis on ions that play important roles in the chemistry of atmospheric aerosols. In addition to surveying results from simulation studies, we discuss challenges to the refinement and experimental validation of the methodology for simulating ion adsorption to the air-water interface, and recent advances in elucidating the driving forces for adsorption. We also review the recent development of a dielectric continuum theory that is capable of reproducing simulation and experimental data on ion behavior at aqueous interfaces.

Douglas J. Tobias; Abraham C. Stern; Marcel D. Baer; Yan Levin; Christopher J. Mundy

2013-06-28T23:59:59.000Z

34

Ionic liquid ion source emitter arrays fabricated on bulk porous substrates for spacecraft propulsion  

E-Print Network (OSTI)

Ionic Liquid Ion Sources (ILIS) are a subset of electrospray capable of producing bipolar beams of pure ions from ionic liquids. Ionic liquids are room temperature molten salts, characterized by negligible vapor pressures, ...

Courtney, Daniel George

2011-01-01T23:59:59.000Z

35

A statistical field theory approach applied to the liquid vapor interface  

E-Print Network (OSTI)

Last years, there has been a renewed interest in the utilization of statistical field theory methods for the description of systems at equilibrium both in the vicinity and away from critical points, in particular in the field of liquid state physics. These works deal in general with homogeneous systems, although recently the study of liquids in the vicinity of hard walls has also been considered in this way. On the other hand, effective Hamiltonian pertaining to the $\\phi^4$ theory family have been written and extensively used for the description of inhomogeneous systems either at the simple interface between equilibrium phases or for the description of wetting. In the present work, we focus on a field theoretical description of the liquid vapor interface of simple fluids. We start from the representation of the grand partition function obtained from the Hubbard-Stratonovich transform leading to an exact formulation of the problem, namely neither introducing an effective Hamiltonian nor associating the field to the one-body density of the liquid. Using as a reference system the hard sphere fluid and imposing the coexistence condition, the expansion of the Hamiltonian obtained yields a usual $\\phi^4$ theory without unknown parameter. An important point is that the so-called capillary wave theory appears as an approximation of the one-loop theory in the functional expansion of the Hamiltonian, without any need to an underlying phenomenology.

Vincent Russier; Jean-Michel Caillol

2009-07-16T23:59:59.000Z

36

Shape-Selectivity with Liquid Crystal and Side-Chain Liquid Crystalline Polymer SAW Sensor Interfaces  

SciTech Connect

A liquid crystal (LC) and a side-chain liquid crystalline polymer (SCLCP) were tested as surface acoustic wave (SAW) vapor sensor coatings for discriminating between pairs of isomeric organic vapors. Both exhibit room temperature smectic mesophases. Temperature, electric-field, and pretreatment with self-assembled monolayers comprising either a methyl-terminated or carboxylic acid-terminated alkane thiol anchored to a gold layer in the delay path of the sensor were explored as means of affecting the alignment and selectivity of the LC and SCLCP films. Results for the LC were mixed, while those for the SCLCP showed a consistent preference for the more rod-like isomer of each isomer pair examined.

FRYE-MASON,GREGORY CHARLES; OBORNY,MICHAEL C.; PUGH,COLEEN; RICCO,ANTONIO; THOMAS,ROSS C.; ZELLERS,EDWARD T.; ZHANG,GUO-ZHENG

1999-09-23T23:59:59.000Z

37

Time-resolved ellipsometry for studies of heat transfer at liquid/solid and gas/solid interfaces  

E-Print Network (OSTI)

partly controlled by the rate of heat transfer across the interface. Heat moving from the metal film is heated by 10 K using an ultrafast optical pump pulse; the subsequent changes of the phase differenceTime-resolved ellipsometry for studies of heat transfer at liquid/solid and gas/solid interfaces

Granick, Steve

38

Response to “Comments on Abrupt-Interface Solution for Carbon Dioxide Injection into Porous Media by Dentz and Tartakovsky (2008)” by Lu et al.  

E-Print Network (OSTI)

continuum mechanics for multiphase porous-media ?ow includ-Brenner, H. : Multiphase ?ow in porous media. Ann. Rev.

Dentz, Marco; Tartakovsky, Daniel M.

2009-01-01T23:59:59.000Z

39

Resistances for heat and mass transfer through a liquid-vapor interface in a binary mixture  

E-Print Network (OSTI)

In this paper we calculate the interfacial resistances to heat and mass transfer through a liquid-vapor interface in a binary mixture. We use two methods, the direct calculation from the actual non-equilibrium solution and integral relations, derived earlier. We verify, that integral relations, being a relatively faster and cheaper method, indeed gives the same results as the direct processing of a non-equilibrium solution. Furthermore we compare the absolute values of the interfacial resistances with the ones obtained from kinetic theory. Matching the diagonal resistances for the binary mixture we find that kinetic theory underestimates the cross coefficients. The heat of transfer is as a consequence correspondingly larger.

Kirill Glavatskiy; Dick Bedeaux

2010-08-20T23:59:59.000Z

40

Resistances for heat and mass transfer through a liquid-vapor interface in a binary mixture  

E-Print Network (OSTI)

In this paper we calculate the interfacial resistances to heat and mass transfer through a liquid-vapor interface in a binary mixture. We use two methods, the direct calculation from the actual non-equilibrium solution and integral relations, derived earlier. We verify, that integral relations, being a relatively faster and cheaper method, indeed gives the same results as the direct processing of a non-equilibrium solution. Furthermore we compare the absolute values of the interfacial resistances with the ones obtained from kinetic theory. Matching the diagonal resistances for the binary mixture we find that kinetic theory underestimates the cross coefficients. The heat of transfer is as a consequence correspondingly larger.

Glavatskiy, Kirill

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Self-Assembly and Orientation of Hydrogen-Bonded Oligothiophene Polymorphs at Liquid?Membrane?Liquid Interfaces  

Science Conference Proceedings (OSTI)

One of the challenges in organic systems with semiconducting function is the achievement of molecular orientation over large scales. We report here on the use of self-assembly kinetics to control long-range orientation of a quarterthiophene derivative designed to combine intermolecular {pi}-{pi} stacking and hydrogen bonding among amide groups. Assembly of these molecules in the solution phase is prevented by the hydrogen-bond-accepting solvent tetrahydrofuran, whereas formation of H-aggregates is facilitated in toluene. Rapid evaporation of solvent in a solution of the quarterthiophene in a 2:1:1 mixture of 1,4-dioxane/tetrahydrofuran/toluene leads to self-assembly of kinetically trapped mats of bundled fibers. In great contrast, slow drying in a toluene atmosphere leads to the homogeneous nucleation and growth of ordered structures shaped as rhombohedra or hexagonal prisms depending on concentration. Furthermore, exceedingly slow delivery of toluene from a high molecular weight polymer solution into the system through a porous aluminum oxide membrane results in the growth of highly oriented hexagonal prisms perpendicular to the interface. The amide groups of the compound likely adsorb onto the polar aluminum oxide surface and direct the self-assembly pathway toward heterogeneous nucleation and growth to form hexagonal prisms. We propose that the oriented prismatic polymorph results from the synergy of surface interactions rooted in hydrogen bonding on the solid membrane and the slow kinetics of self-assembly. These observations demonstrate how self-assembly conditions can be used to guide the supramolecular energy landscape to generate vastly different structures. These fundamental principles allowed us to grow oriented prismatic assemblies on transparent indium-doped tin oxide electrodes, which are of interest in organic electronics.

Tevis, Ian D.; Palmer, Liam C.; Herman, David J.; Murray, Ian P.; Stone, David A.; Stupp, Samuel I. (NWU)

2012-03-15T23:59:59.000Z

42

Contact Angle of the Colloidal Liquid-Gas Interface and a Hard Wall  

E-Print Network (OSTI)

We consider the Asakura-Oosawa-Vrij model of hard sphere colloids and ideal polymer coils in contact with a planar hard wall at (colloidal) liquid-gas coexistence. Using extensive numerical density functional calculations, the liquid-gas, wall-liquid and wall-gas interfacial free energies are calculated. The results are inserted into Young's equation to obtain the contact angle between the liquid-gas interface and the wall. As a function of polymer fugacity this angle exhibits discontinuities of slope (``kinks'') upon crossing first-order surface phase transitions located on the gas branch of the bulk binodal. Each kink corresponds to a transition from n-1 to $n$ colloid layers adsorbed at the wall, referred to as the n'th layering transition. The corresponding adsorption spinodal points from n-1 to n layers upon reducing the polymer fugacity along the bulk binodal were found in a previous study (J. M. Brader et al. J. Phys.: Cond. Matt., 14: L1, 2002; Mol. Phys., 101: 3349, 2003). Remarkably, we find desorption spinodal points from n to n-1 layers to be absent upon increasing polymer fugacity at bulk coexistence, and many branches (containing up to 7 colloid layers) remain metastable. Results for the first layering binodal and both spinodal branches off-bulk coexistence hint at a topology of the surface phase diagram consistent with these findings. Both the order of the transition to complete wetting and whether it is preceded by a finite or an infinite number of layering transitions remain open questions. We compare the locations of the first layering binodal line and of the second layering binodal point at bulk coexistence with recent computer simulation results by Dijkstra and van Roij (Phys. Rev. Lett., 89: 208303, 2002) and discuss our results for the contact angle in the light of recent experiments.

Paul P. F. Wessels; Matthias Schmidt; Hartmut Lowen

2004-05-07T23:59:59.000Z

43

Supporting Material for: Capillary-like Fluctuations of a Solid-Liquid Interface in a Non-Cohesive Granular System  

E-Print Network (OSTI)

In this supplementary paper we present some details on the solid-liquid interface detection, the deduction of the non-equilibrium free energy, the analysis of the granular temperature and energy per mode, a validation of the small slope approximation, a description of the Langevin dynamics, and the error analysis.

Li-Hua Luu; Gustavo Castillo; Nicolás Mujica; Rodrigo Soto

2013-04-09T23:59:59.000Z

44

NIST: Characterization of Porous Transport Media for ...  

Science Conference Proceedings (OSTI)

... properties of a porous transport layer (PTL) – porosity distribution, liquid saturation as a function of pressure, liquid and gas permeability, thermal ...

2013-07-23T23:59:59.000Z

45

Syngas production from heavy liquid fuel reforming in inert porous media  

E-Print Network (OSTI)

with the low H2 density is the movement: the power required to pump hydrogen is around 4.5 times higher than for natural gas per unit of delivered energy [17]. Hydrogen can be stored on-board a vehicle as a compressed gas, as a liquid in cryogenic containers... and the transportation system are mainly based on the combustion of fossil fuels, generally defined as oil, coal and natural gas, as shown in Fig. 1.1. There are several issues to be considered about fossil fuel consumption. First of all, the greenhouse gas emission, due...

Pastore, Andrea

2010-11-16T23:59:59.000Z

46

Gas Bubbles and Gas Pancakes at Liquid/Solid Interface: A Continuum Theory Incorporated with Molecular Interactions  

E-Print Network (OSTI)

The states of gas accumulated at the liquid-solid interface are analyzed based on the continuum theory where the Hamaker constant is used to describe the long-range interaction at the microscopic scale. The Hamaker constant is always negative, whereas the gas spreading coefficient can be either sign. Despite the complexity of gas, including that the density profile may not be uniform due to absorption on both solid and liquid surfaces, we predict three possible gas states at the liquid-solid interface, i.e. complete wetting, partial wetting and pseudopartial wetting. These possible gas states correspond respectively to a gas pancake (or film) surrounded by a wet solid, a gas bubble with a finite contact angle, and a gas bubble(s) coexisting with a gas pancake. Typical thickness of the gas pancakes is at the nanoscale within the force range of the long-range interaction, whereas the radius of the gas bubbles can be large. The state of gas bubble(s) coexisting with a gas film is predicted theoretically for the first time. Our theoretical results can contribute to the development of a unified picture of gas nucleation at the liquid-solid interface.

Zhaoxia Li; Xuehua Zhang; Lijuan Zhang; Xiaocheng Zeng; Jun Hu; Haiping Fang

2006-08-04T23:59:59.000Z

47

Richtmyer-Meshkov Instability of a Liquid-Gas Interface Driven by a Cylindrical Imploding Pressure Wave  

E-Print Network (OSTI)

The compression of a cylindrical gas bubble by an imploding molten lead (Pb) shell may be accompanied by the development of the Richtmyer-Meshkov (RM) instability at the liquid-gas interface due to the initial imperfection of the interface. A converging pressure wave impinging upon the interface causes a shell of liquid to detach and continue to travel inwards, compressing the gas bubble. The efficiency of compression and collapse evolution can be affected by development of the RM instability. Investigations have been performed in the regime of extreme Atwood number $A=-1$ with the additional complexity of modeling liquid cavitation in the working fluid. Simulations have been carried out using the open source CFD software OpenFOAM on a set of parameters relevant to the prototype compression system under development at General Fusion Inc. for use as a Magnetized Target Fusion (MTF) driver. After validating the numerical setup in planar geometry, simulations have been carried out in 2D cylindrical geometry for both initially smooth and perturbed interfaces. Where possible, results have been validated against existing theoretical models and very good agreement has been found. While our main focus is on the effects of initial perturbation amplitude and azimuthal mode number, we also address differences between this problem and those usually considered, such as RM instability at an interface between two gases with a moderate density ratio. One important difference is the formation of narrow molten lead jets rapidly propagating inwards during the final stages of the collapse. Jet behaviour has been observed for a range of azimuthal mode numbers and perturbation amplitudes.

Victoria Suponitsky; Sandra Barsky; Aaron Froese

2013-10-22T23:59:59.000Z

48

A study of the solid-liquid interface in cobalt base alloy (Stellite) coatings deposited by fusion welding (TIG)  

SciTech Connect

Microstructural features present at the interface between a weld deposited Stellite 6 hard facing and an austenitic stainless steel substrate are described. Elemental X-ray maps indicate that diffusion of carbon from the liquid Stellite to the austenitic stainless steel takes place along grain boundaries resulting in the formation of chromium carbide 'arms' that penetrate along the austenite grain boundaries in the interfacial region.

Molleda, F. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (Spain)]. E-mail: fmolleda@etsin.upm.es; Mora, J. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (Spain); Molleda, F.J. [ESAB Iberica (Spain); Mora, E. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (Spain); Carrillo, E. [Escuela Tecnica Superior de Ingenieros Navales de Madrid (Spain); Mellor, B.G. [University of Southampton (United Kingdom)

2006-12-15T23:59:59.000Z

49

Adsorption Trajectories and Free-Energy Separatrices for Colloidal Particles in Contact with a Liquid-Liquid Interface  

E-Print Network (OSTI)

We apply the recently developed triangular tessellation technique as presented in [J. de Graaf et al., Phys. Rev. E 80, 051405 (2009)] to calculate the free energy associated with the adsorption of anisotropic colloidal particles at a flat interface. From the free-energy landscape, we analyze the adsorption process, using a simplified version of Langevin dynamics. The present result is a first step to understand the time-dependent behavior of colloids near interfaces. This study shows a wide range of adsorption trajectories, where the emphasis lies on a strong dependence of the dynamics on the orientation of the colloid at initial contact with the interface. We believe that the observed orientational dependence in our simple model can be recovered in suitable experimental systems.

J. de Graaf; M. Dijkstra; R. van Roij

2010-02-18T23:59:59.000Z

50

Morphological instability of the solid-liquid interface in crystal growth under supercooled liquid film flow and natural convection airflow  

E-Print Network (OSTI)

Ring-like ripples on the surface of icicles are an example of morphological instability of the ice-water interface during ice growth under supercooled water film flow. The surface of icicles is typically covered with ripples of about 1 cm in wavelength, and the wavelength appears to be almost independent of external temperature, icicle radius, and volumetric water flow rate. One side of the water layer consists of the water-air surface and growing ice is the other. This is one of the more complicated moving phase boundary problems with two interfaces. A recent theoretical work [K. Ueno, Phys. Rev. E 68, (2003) 021603] to address the underlying instability that produces ripples is based on the assumption of the absence of airflow around icicles. In this paper, we extend the previous theoretical framework to include a natural convection airflow ahead of the water-air surface and consider whether the effect of natural convection airflow on the wavelength of ripples produced on an ice surface is essential or not.

Ueno, K

2011-01-01T23:59:59.000Z

51

Atomic transport at liquid metal/Al{sub 2}O{sub 3} interfaces  

SciTech Connect

In this work, atomic force microscopy (AFM) has been used to identify the controlling transport mechanisms at metal/oxide interfaces and measure the corresponding diffusivities. Interfacial transport rates in our experiments are two to four orders of magnitude faster than any previously reported rates for the oxide surface. The interfacial diffusivities and the degree of interfacial anisotropy depend on the oxygen activity of the system. Atomic transport at metal/oxide interfaces plays a defining role in many technological processes, and these experiments provide fundamental data for the formulation of the atomic theory needed to explain many of the observed phenomena.

Saiz, Eduardo; Cannon, Rowland M.; Tomsia, Antoni P.

2000-10-12T23:59:59.000Z

52

In Situ Immobilization of Uranium in Structured Porous Media via Biomineralization at the Fracture/Matrix Interface – Subproject to Co-PI Eric E. Roden  

Science Conference Proceedings (OSTI)

Although the biogeochemical processes underlying in situ bioremediation technologies are increasingly well understood, field-scale heterogeneity (both physical and biogeochemical) remains a major obstacle to successful field-scale implementation. In particular, slow release of contamination from low-permeability regions (primarily by diffusive/dispersive mass transfer) can hinder the effectiveness of remediation. The research described in this report was conducted in conjunction with a project entitled “In Situ Immobilization of Uranium in Structured Porous Media via Biomineralization at the Fracture/Matrix Interface”, which was funded through the Field Research element of the former NABIR Program (now the Environmental Remediation Sciences Program) within the Office of Biological and Environmental Research. Dr. Timothy Scheibe (Pacific Northwest National Laboratory) was the overall PI/PD for the project, which included Scott Brooks (Oak Ridge National Laboratory) and Eric Roden (formerly at The University of Alabama, now at the University of Wisconsin) as separately-funded co-PIs. The overall goal of the project was to evaluate strategies that target bioremediation at interfaces between high- and low-permeability regions of an aquifer in order to minimize the rate of contaminant transfer into high-permeability/high fluid flow zones. The research was conducted at the Area 2 site of the Field Research Center (FRC) at Oak Ridge National Laboratory (ORNL). Area 2 is a shallow pathway for migration of contaminated groundwater to seeps in the upper reach of Bear Creek at ORNL, mainly through a ca. 1 m thick layer of gravel located 4-5 m below the ground surface. Hydrological tracer studies indicate that the gravel layer receives input of uranium from both upstream sources and from diffusive mass transfer out of highly contaminated fill and saprolite materials above and below the gravel layer. We sought to test the hypothesis that injection of electron donor into this layer would induce formation of a redox barrier in the less conductive materials above and below the gravel, resulting in decreased mass transfer of uranium out these materials and attendant declines in groundwater U(VI) concentration. Details regarding the planning, execution, and results of the in situ biostimulation experiment will be provided in separate peer-reviewed publications by the project PIs and colleagues. This report summarizes research activities conducted at The University of Alabama (2002-2005) and the University of Wisconsin (2005-2007) in support of the field experiment, which included (1) chemical and microbiological characterization of sediment cores from Area 2; (2) sediment slurry experiments with Area 2 materials which evaluated the biogeochemical response to ethanol amendment and the potential for U(VI) reduction; (3) analysis of the response of groundwater microbial communities to in situ biostimulation. In addition, biogeochemical reaction models of microbial metabolism in ethanol-stimulated sediments, developed based on sediment slurry experiments, are described.

Eric E. Roden

2007-11-02T23:59:59.000Z

53

Effective Hamiltonian for a liquid-gas interface fluctuating around a corrugated cylindrical substrate in the presence of van der Waals interactions  

E-Print Network (OSTI)

We investigate liquid layers adsorbed at spherical and corrugated cylindrical substrates. The effective Hamiltonians for the liquid-gas interfaces fluctuating in the presence of such curved substrates are derived via the mean-field density functional theory. Their structure is compared with the Helfrich Hamiltonian which is parametrized by the bending and Gaussian rigidity coefficients. For long-ranged interparticle interactions of van der Waals type these coefficients turn out to be non-universal functions of interfacial curvatures; their form varies from one interface to another. We discuss implications of the structure of these functions on the effective Hamiltonian.

F. Dutka; M. Napiorkowski

2009-01-20T23:59:59.000Z

54

TESTING VAPOR SPACE AND LIQUID-AIR INTERFACE CORROSION IN SIMULATED ENVIRONMENTS OF HANFORD DOUBLE-SHELLED TANKS  

Science Conference Proceedings (OSTI)

Electrochemical coupon testing were performed on 6 Hanford tank solution simulants and corresponding condensate simulants to evaluate the susceptibility of vapor space and liquid/air interface corrosion. Additionally, partial-immersion coupon testing were performed on the 6 tank solution simulants to compliment the accelerated electrochemical testing. Overall, the testing suggests that the SY-102 high nitrate solution is the most aggressive of the six solution simulants evaluated. Alternatively, the most passive solution, based on both electrochemical testing and coupon testing, was AY-102 solution. The presence of ammonium nitrate in the simulants at the lowest concentration tested (0.001 M) had no significant effect. At higher concentrations (0.5 M), ammonium nitrate appears to deter localized corrosion, suggesting a beneficial effect of the presence of the ammonium ion. The results of this research suggest that there is a threshold concentration of ammonium ions leading to inhibition of corrosion, thereby suggesting the need for further experimentation to identify the threshold.

Hoffman, E.

2013-05-30T23:59:59.000Z

55

Heat transfer between stratified immiscible liquid layers driven by gas bubbling across the interface  

SciTech Connect

The modeling of molten core debris in the CORCON and VANESA computer codes as overlying, immiscible liquid layers is discussed as it relates to the transfer of heat and mass between the layers. This initial structure is identified and possible configurations are discussed. The stratified, gas-sparged configuration that is presently employed in CORCON and VANESA is examined and the existing literature for interlayer heat transfer is assessed. An experiment which was designed to measure interlayer heat transfer with gas sparging is described. The results are presented and compared to previously existing models. A dimensionless correlation for stratified, interlayer heat transfer with gas sparging is developed. This relationship is recommended for inclusion in CORCON-MOD2 for heat transfer between stratified, molten liquid layers. 12 refs., 6 figs., 3 tabs.

Greene, G.A.; Irvine, T.F. Jr.

1988-01-01T23:59:59.000Z

56

Study of Hydrophobic and Ionizable Hydrophilic Copolymers at Polymer/Solid and Polymer/Liquid Interfaces  

Science Conference Proceedings (OSTI)

Joint experimental-computational efforts were set to characterize the interfacial effects on the structure and dynamics of polymers consisting of highly rigid hydrophilic-ionizable and hydrophobic sub-units within one polymeric chain casted into thin films of several molecular dimensions. Focusing on the ultra thin film region we separate out the interfacial effects from bulk characteristics. Specifically, the study sought to: identify the parameters that control the formation of a stable polymer-solid interface. The study consists of two components, experimental investigations and computational efforts. The experimental component was designed to derive empirical trends that can be used to correlate the set of coupled polymer molecular parameters with the interfacial characteristics of these polymers, and their response to presence of solvents. The computational study was designed to provide molecular insight into the ensemble averages provided by the experimental efforts on multiple length scales from molecular dimensions, to the nanometer lengths to a macroscopic understanding of solvent interactions with structured polymers. With the ultimate goal of correlating molecular parameters to structure, dynamics and properties of ionic polymers, the first stage of the research began with the study of two systems, one which allowed tailoring the flexibility of the backbone without the presence of ionic groups, but with a potential to sulfonate groups at a later stage, and a polymer whose backbone is rigid and the density of the ionic group can be varied. The combined experimental and computational studies significantly extended the understanding of polymers at interfaces from model systems to polydispersed copolymers with blocks of varying nature and complexity. This new insight directly affects the design of polymers for sustainable energy applications from batteries and fuel cells to solar energy.

Perahia, Dvora

2011-11-01T23:59:59.000Z

57

Wall-Fluid and Liquid-Gas Interfaces of Model Colloid-Polymer Mixtures by Simulation and Theory  

E-Print Network (OSTI)

We perform a study of the interfacial properties of a model suspension of hard sphere colloids with diameter $\\sigma_c$ and non-adsorbing ideal polymer coils with diameter $\\sigma_p$. For the mixture in contact with a planar hard wall, we obtain from simulations the wall-fluid interfacial free energy, $\\gamma_{wf}$, for size ratios $q=\\sigma_p/\\sigma_c=0.6$ and 1, using thermodynamic integration, and study the (excess) adsorption of colloids, $\\Gamma_c$, and of polymers, $\\Gamma_p$, at the hard wall. The interfacial tension of the free liquid-gas interface, $\\gamma_{lg}$, is obtained following three different routes in simulations: i) from studying the system size dependence of the interfacial width according to the predictions of capillary wave theory, ii) from the probability distribution of the colloid density at coexistence in the grand canonical ensemble, and iii) for statepoints where the colloidal liquid wets the wall completely, from Young's equation relating $\\gamma_{lg}$ to the difference of wall-liquid and wall-gas interfacial tensions, $\\gamma_{wl}-\\gamma_{wg}$. In addition, we calculate $\\gamma_{wf}, \\Gamma_c$, and $\\Gamma_p$ using density functional theory and a scaled particle theory based on free volume theory. Good agreement is found between the simulation results and those from density functional theory, while the results from scaled particle theory quantitatively deviate but reproduce some essential features. Simulation results for $\\gamma_{lg}$ obtained from the three different routes are all in good agreement. Density functional theory predicts $\\gamma_{lg}$ with good accuracy for high polymer reservoir packing fractions, but yields deviations from the simulation results close to the critical point.

Andrea Fortini; Marjolein Dijkstra; Matthias Schmidt; Paul P. F. Wessels

2005-01-07T23:59:59.000Z

58

Measurements of liquid film thickness for a droplet at a two-fluid interface  

E-Print Network (OSTI)

The impact of a buoyancy driven oil droplet with an oil-water interface is investigated using time-resolved Particle Image Velocimetry (PIV) along with a phase discrimination by means of high-speed Laser Induced Fluorescence (LIF). In this paper we focus on the investigation of strategies to optimize the performance of high-speed PIV algorithms. Furthermore this data will be used for validation of numerical simulations of two phase flows. To simultaneously measure the flow velocities inside and around the oil droplet by PIV the refractive indices of both phases need to be matched. The aqueous phase consists of a mixture of corn syrup and water, which defines the viscosity as well as the refractive index. The disperse phase consists of a mixture of two mineral oils. The latter are mixed to match the refractive index of the continuous phase. Both phases are seeded with tracer particles required for PIV. A fluorescent dye is added to the dispersed phase to allow discrimination of the PIV signals originating from...

Miessner, U; Delfos, R; Lindken, R; Westerweel, J

2011-01-01T23:59:59.000Z

59

Ionic Liquid-Enhanced Solid State Electrolyte Interface (SEI) for Lithium Sulfur Batteries  

Science Conference Proceedings (OSTI)

Li-S battery is a complicated system with many challenges existing before its final market penetration. While most of the reported work for Li-S batteries is focused on the cathode design, we demonstrate in this work that the anode consumption accelerated by corrosive polysulfide solution also critically determines the Li-S cell performance. To validate this hypothesis, ionic liquid (IL) N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Py14TFSI) has been employed to modify the properties of SEI layer formed on Li metal surface in Li-S batteries. It is found that the IL-enhanced passivation film on the lithium anode surface exhibits much different morphology and chemical compositions, effectively protecting lithium metal from continuous attack by soluble polysulfides. Therefore, both cell impedance and the irreversible consumption of polysulfides on lithium metal are reduced. As a result, the Coulombic efficiency and the cycling stability of Li-S batteries have been greatly improved. After 120 cycles, Li-S battery cycled in the electrolyte containing IL demonstrates a high capacity retention of 94.3% at 0.1 C rate. These results unveil another important failure mechanism for Li-S batteries and shin the light on the new approaches to improve Li-S battery performances.

Zheng, Jianming; Gu, Meng; Chen, Honghao; Meduri, Praveen; Engelhard, Mark H.; Zhang, Jiguang; Liu, Jun; Xiao, Jie

2013-05-16T23:59:59.000Z

60

Solid Liquid Interface (SLIM)  

United States government (Department of Energy, Office of Environmental Management, under Grant No. DE?FG01?05EW07033). Neither ... Project Conclusion ...

Note: This page contains sample records for the topic "liquid porous interfaces" 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.


61

Elucidating through-plane liquid water profile in a polymer electrolyte membrane fuel cell.  

DOE Green Energy (OSTI)

In this paper, a numerical model incorporating micro-porous layers (MPLs) is presented for simulating water transport within the gas diffusion layers (GDLs) and MPLs as well as across their interfaces in a polymer electrolyte membrane (PEM) fuel cell. One-dimensional analysis is conducted to investigate the impacts of MPL and GDL properties on the liquid-water profile across the anode GDL-MPL and cathode MPL-GDL regions. Furthermore, two-dimensional numerical simulations that take MPLs into account are also carried out to elucidate liquid water transport, particularly through-plane liquid-water profile in a PEM fuel cell. Results from case studies are presented.

Wang, Yun (University of California, Irvine, CA); Chen, Ken Shuang

2010-10-01T23:59:59.000Z

62

Nano-laminated Ti3Al Porous Structure Produced by Hot Forging ...  

Science Conference Proceedings (OSTI)

Extending Bulk CALPHAD Methods to Interfaces and Nanomaterials to Help ... Ti3Al Porous Structure Produced by Hot Forging and Selective Dissolution.

63

Liquid foams of graphene  

E-Print Network (OSTI)

Liquid foams are dispersions of bubbles in a liquid. Bubbles are stabilized by foaming agents that position at the interface between the gas and the liquid. Most foaming agents, such as the commonly used sodium dodecylsulfate, ...

Alcazar Jorba, Daniel

2012-01-01T23:59:59.000Z

64

Variably porous structures  

DOE Patents (OSTI)

A method of making a monolithic porous structure, comprises electrodepositing a material on a template; removing the template from the material to form a monolithic porous structure comprising the material; and electropolishing the monolithic porous structure.

Braun, Paul V. (Savoy, IL); Yu, Xindi (Urbana, IL)

2011-01-18T23:59:59.000Z

65

Bioanalytical Applications of Fluorescence Line-Narrowing and Non-Line-Narrowing Spectroscopy Interfaced with Capillary Electrophoresis and High-Performance Liquid Chromatography  

Science Conference Proceedings (OSTI)

Capillary electrophoresis (CE) and high-performance liquid chromatography (HPLC) are widely used analytical separation techniques with many applications in chemical, biochemical, and biomedical sciences. Conventional analyte identification in these techniques is based on retention/migration times of standards; requiring a high degree of reproducibility, availability of reliable standards, and absence of coelution. From this, several new information-rich detection methods (also known as hyphenated techniques) are being explored that would be capable of providing unambiguous on-line identification of separating analytes in CE and HPLC. As further discussed, a number of such on-line detection methods have shown considerable success, including Raman, nuclear magnetic resonance (NMR), mass spectrometry (MS), and fluorescence line-narrowing spectroscopy (FLNS). In this thesis, the feasibility and potential of combining the highly sensitive and selective laser-based detection method of FLNS with analytical separation techniques are discussed and presented. A summary of previously demonstrated FLNS detection interfaced with chromatography and electrophoresis is given, and recent results from on-line FLNS detection in CE (CE-FLNS), and the new combination of HPLC-FLNS, are shown.

Kenneth Paul Roberts

2002-06-27T23:59:59.000Z

66

HUMAN MACHINE INTERFACE (HMI) EVALUATION OF ROOMS TA-50-1-60/60A AT THE RADIOACTIVE LIQUID WASTE TREATMENT FACILITY (RLWTF)  

Science Conference Proceedings (OSTI)

This effort addressed an evaluation of human machine interfaces (HMIs) in Room TA-50-1-60/60A of the Radioactive Liquid Waste Treatment Facility (RLWTF). The evaluation was performed in accordance with guidance outlined in DOE-STD-3009, DOE Standard Preparation Guide for U.S. Department of Energy Nonreactor Nuclear Facility Documented Safety Analyses, 2006 [DOE 2006]. Specifically, Chapter 13 of DOE 2006 highlights the 10 CFR 830, Nuclear Safety Management, 2012, [CFR 2012] and DOE G 421.1-2 [DOE 2001a] requirements as they relate to the human factors process and, in this case, the safety of the RLWTF. The RLWTF is a Hazard Category 3 facility and, consequently, does not have safety-class (SSCs). However, safety-significant SSCs are identified. The transuranic (TRU) wastewater tanks and associated piping are the only safety-significant SSCs in Rooms TA-50-1-60/60A [LANL 2010]. Hence, the human factors evaluation described herein is only applicable to this particular assemblage of tanks and piping.

Gilmore, Walter E. [Los Alamos National Laboratory; Stender, Kerith K. [Los Alamos National Laboratory

2012-08-29T23:59:59.000Z

67

Standard and High Speed Atomic Force Microscopy of Porous ...  

Science Conference Proceedings (OSTI)

Symposium, Frontiers of Materials Science: Fundamentals of Porous ... insight into material performance due to the nanoscale topographic and/or property mapping ... Separately, for human tooth cross sections measured in liquid, a range of ...

68

Impact of nonaqueous phase liquid (NAPL) source zone architecture on mass removal mechanisms in strongly layered heterogeneous porous media during soil vapor extraction  

Science Conference Proceedings (OSTI)

An existing multiphase flow simulator was modified in order to determine the effects of four mechanisms on NAPL mass removal in a strongly layered heterogeneous vadose zone during soil vapor extraction (SVE): a) NAPL flow, b) diffusion and dispersion from low permeability zones, c) slow desorption from sediment grains, and d) rate-limited dissolution of trapped NAPL. The impact of water and NAPL saturation distribution, NAPL type (i.e., free, residual, or trapped) distribution, and spatial heterogeneity of the permeability field on these mechanisms were evaluated. Two different initial source zone architectures (one with and one without trapped NAPL) were considered and these architectures were used to evaluate seven different SVE scenarios. For all runs, slow diffusion from low permeability zones that gas flow bypassed was a dominant factor for diminished SVE effectiveness at later times. This effect was more significant at high water saturation due to the decrease of gas-phase relative permeability. Transverse dispersion contributed to fast NAPL mass removal from the low permeability layer in both source zone architectures, but longitudinal dispersion did not affect overall mass removal time. Both slow desorption from sediment grains and rate-limited mass transfer from trapped NAPL only marginally affected removal times. However, mass transfer from trapped NAPL did affect mass removal at late time, as well as the NAPL distribution. NAPL flow from low to high permeability zones contributed to faster mass removal from the low permeability layer, and this effect increased when water infiltration was eliminated. These simulations indicate that if trapped NAPL exists in heterogeneous porous media, mass transfer can be improved by delivering gas directly to zones with trapped NAPL and by lowering the water content, which increases the gas relative permeability and changes trapped NAPL to free NAPL.

Yoon, Hongkyu; Werth, Charlie; Valocchi, Albert J.; Oostrom, Martinus

2008-09-26T23:59:59.000Z

69

Liquid metal electric pump  

DOE Patents (OSTI)

An electrical pump for pumping liquid metals to high pressures in high temperature environments without the use of magnets or moving mechanical parts. The pump employs a non-porous solid electrolyte membrane, typically ceramic, specific to the liquid metal to be pumped. A DC voltage is applied across the thickness of the membrane causing ions to form and enter the membrane on the electrically positive surface, with the ions being neutralized on the opposite surface. This action provides pumping of the liquid metal from one side of the non-porous solid electrolyte membrane to the other. 3 figs.

Abbin, J.P.; Andraka, C.E.; Lukens, L.L.; Moreno, J.B.

1992-01-14T23:59:59.000Z

70

Two-Phase Flow Within Porous Media Analogies: Application Towards CO2 Sequestration  

Science Conference Proceedings (OSTI)

Geologic carbon dioxide sequestration (GCO2S) involves the capture of large quantities of CO2 from point-source emitters and pumping this greenhouse gas to subsurface reservoirs (USDOE, 2006). The mechanisms of two-phase fluid displacement in GCO2S, where a less viscous fluid displaces a more viscous fluid in a heterogeneous porous domain is similar to enhanced oil recovery activities. Direct observation of gas-liquid interface movement in geologic reservoirs is difficult due to location and opacity. Over the past decades, complex, interconnected pore-throat models have been developed and used to study multiphase flow interactions in porous media, both experimentally (Buckley, 1994) and numerically (Blunt, 2001). This work expands upon previous experimental research with the use of a new type of heterogeneous flowcell, created with stereolithography (SL). Numerical solutions using the Volume-of-Fluid (VOF) model with the same flowcell geometry, are shown to be in good agreement with the drainage experiments, where the defending fluid wets the surface. This computational model is then used to model imbibition, the case of the invading fluid preferentially wetting the surface. Low capillary flows and imbibition conditions are shown to increase the storage volume of the invading fluid in the porous medium.

Crandall, D.M. Clarkson University, Potsdam, NY); Ahmadi, G. (Clarkson University, Potsdam, NY); Smith, D.H.

2007-04-20T23:59:59.000Z

71

Tailored Porous Materials  

Science Conference Proceedings (OSTI)

Tailoring of porous materials involves not only chemical synthetic techniques for tailoring microscopic properties such as pore size, pore shape, pore connectivity, and pore surface reactivity, but also materials processing techniques for tailoring the meso- and the macroscopic properties of bulk materials in the form of fibers, thin films and monoliths. These issues are addressed in the context of five specific classes of porous materials: oxide molecular sieves, porous coordination solids, porous carbons, sol-gel derived oxides, and porous heteropolyanion salts. Reviews of these specific areas are preceded by a presentation of background material and review of current theoretical approaches to adsorption phenomena. A concluding section outlines current research needs and opportunities.

BARTON,THOMAS J.; BULL,LUCY M.; KLEMPERER,WALTER G.; LOY,DOUGLAS A.; MCENANEY,BRIAN; MISONO,MAKOTO; MONSON,PETER A.; PEZ,GUIDO; SCHERER,GEORGE W.; VARTULI,JAMES C.; YAGHI,OMAR M.

1999-11-09T23:59:59.000Z

72

Gas Transport and Control in Thick-Liquid Inertial Fusion Power Plants  

E-Print Network (OSTI)

Perspectives . . . . . . . . . . . . Gas-Liquid Interface5.4 A Novel Gas-Liquid Interface Model . . . . 5.4.1Chapter 5 deals with a novel gas/liquid interface. Chapter 6

Debonnel, Christophe Sylvain

2006-01-01T23:59:59.000Z

73

Liquid ventilation  

E-Print Network (OSTI)

For 350 million years, fish have breathed liquid through gills. Mammals evolved lungs to breathe air. Rarely, circumstances can occur when a mammal needs to `turn back the clock' to breathe through a special liquid medium. This is particularly true if surface tension at the air-liquid interface of the lung is increased, as in acute lung injury. In this condition, surface tension increases because the pulmonary surfactant system is damaged, causing alveolar collapse, atelectasis, increased right-to-left shunt and hypoxaemia. 69 The aims of treatment are: (i) to offset increased forces causing lung collapse by applying mechanical ventilation with PEEP; (ii) to decrease alveolar surface tension with exogenous surfactant; (iii) to eliminate the air-liquid interface by filling the lung with a fluid in

U. Kaisers; K. P. Kelly; T. Busch

2003-01-01T23:59:59.000Z

74

Electrochemistry of Porous Materials  

Science Conference Proceedings (OSTI)

Dec 31, 2012 ... Electrochemistry of Porous Materials is the book under review. The book is written by Antonio Domenech Carbo,and published by CRC press.

75

Carbon Films Produced from Ionic Liquid Carbon Precursors ...  

The invention is directed to a method for producing a film of porous carbon, the method comprising carbonizing a film of an ionic liquid, wherein the ...

76

Open-cell glass crystalline porous material  

DOE Patents (OSTI)

An open-cell glass crystalline porous material made from hollow microspheres which are cenospheres obtained from fly ash, having an open-cell porosity of up to 90 vol. % is produced. The cenospheres are separated into fractions based on one or more of grain size, density, magnetic or non-magnetic, and perforated or non-perforated. Selected fractions are molded and agglomerated by sintering with a binder at a temperature below the softening temperature, or without a binder at a temperature about, or above, the softening temperature but below the temperature of liquidity. The porous material produced has an apparent density of 0.3-0.6 g/cm.sup.3, a compressive strength in the range of 1.2-3.5 MPa, and two types of openings: through-flow wall pores in the cenospheres of 0.1-30 micrometers, and interglobular voids between the cenospheres of 20-100 micrometers. The porous material of the invention has properties useful as porous matrices for immobilization of liquid radioactive waste, heat-resistant traps and filters, supports for catalysts, adsorbents and ion-exchangers.

Anshits, Alexander G. (Krasnoyarsk, RU); Sharonova, Olga M. (Krasnoyarsk, RU); Vereshchagina, Tatiana A. (Krasnoyarsk, RU); Zykova, Irina D. (Krasnoyarsk, RU); Revenko, Yurii A. (Zheleznogorsk, RU); Tretyakov, Alexander A. (Zheleznogorsk, RU); Aloy, Albert S. (Saint-Petersburg, RU); Lubtsev, Rem I. (Saint-Petersburg, RU); Knecht, Dieter A. (Idaho Falls, ID); Tranter, Troy J. (Idaho Falls, ID); Macheret, Yevgeny (Idaho Falls, ID)

2002-01-01T23:59:59.000Z

77

Ventilation of porous media  

DOE Patents (OSTI)

Methods for distributing gases throughout the interstices of porous materials and removing volatile substances from the interstices of porous materials. Continuous oscillation of pressures and flows results in increased penetration of the interstices by flowing gases and increased transport of gaseous components out of the interstices. The invention is particularly useful in soil vapor extraction.

Neeper, D.A.

1992-12-31T23:59:59.000Z

78

Ventilation of porous media  

DOE Patents (OSTI)

Methods are presented for distributing gases throughout the interstices of porous materials and removing volatile substances from the interstices of porous materials. Continuous oscillation of pressures and flows results in increased penetration of the interstices by flowing gases and increased transport of gaseous components out of the interstices. The invention is particularly useful in soil vapor extraction. 10 figures.

Neeper, D.A.

1994-02-22T23:59:59.000Z

79

Film bonded fuel cell interface configuration  

DOE Patents (OSTI)

An improved interface configuration for use between adjacent elements of a fuel cell stack. The interface is impervious to gas and liquid and provides resistance to corrosion by the electrolyte of the fuel cell. A multi-layer arrangement for the interface provides bridging electrical contact with a hot-pressed resin filling the void space.

Kaufman, Arthur (West Orange, NJ); Terry, Peter L. (Chatham, NJ)

1985-01-01T23:59:59.000Z

80

Preparation of asymmetric porous materials  

SciTech Connect

A method for preparing an asymmetric porous material by depositing a porous material film on a flexible substrate, and applying an anisotropic stress to the porous media on the flexible substrate, where the anisotropic stress results from a stress such as an applied mechanical force, a thermal gradient, and an applied voltage, to form an asymmetric porous material.

Coker, Eric N. (Albuquerque, NM)

2012-08-07T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Cathode porous transport irreversibility model for PEM fuel cell design  

Science Conference Proceedings (OSTI)

The influence is studied of slip-irreversibility at the interface between the gas diffusion layer, also referred to here as the porous transport layer, and the catalyst layer of a proton exchange membrane fuel cell (PEMFC). A two-dimensional cathode ... Keywords: catalyst layer, exergy, gas diffusion layer, slip flow irreversibility

E. O. B. Ogedengbe; M. A. Rosen

2009-02-01T23:59:59.000Z

82

Hydraulikos: ice, water, and steam as user-interfaces  

Science Conference Proceedings (OSTI)

In 2001 the term "Natural User Interface" (NUI) was coined to denote the use of wearable computing or of physical matter (solids, liquids, and gases) as direct user interfaces for metaphor-free computing ["Intelligent Image Processing", ...

Steve Mann; Ryan Janzen

2012-02-01T23:59:59.000Z

83

Multiprocessor interface  

Science Conference Proceedings (OSTI)

The author describes a hardware link between two microprocessor systems, each of which can be regarded as a peripheral of the other. The link uses two MC 68230 PI/T-parallel interface/timer-chips, one at each processor. Each PI/T interfaces to the high-speed bus signals coming from its processor, and to a shared TTL sequencer. The sequencer controls the transfer of data over a bidirectional data bus between the two PI/Ts, at a data rate optimized to the individual application. This interface is designed to allow the programmer a choice of data transfer control methods: software polling of a status register, either of two different interrupt request protocols, or DMA requests.

Eckert, K.

1982-11-01T23:59:59.000Z

84

Porous metallic bodies  

DOE Patents (OSTI)

Porous metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides a

Landingham, R.L.

1984-03-13T23:59:59.000Z

85

Lithium-based surfaces controlling fusion plasma behavior at the plasma-material interface  

SciTech Connect

The plasma-material interface and its impact on the performance of magnetically confined thermonuclear fusion plasmas are considered to be one of the key scientific gaps in the realization of nuclear fusion power. At this interface, high particle and heat flux from the fusion plasma can limit the material's lifetime and reliability and therefore hinder operation of the fusion device. Lithium-based surfaces are now being used in major magnetic confinement fusion devices and have observed profound effects on plasma performance including enhanced confinement, suppression and control of edge localized modes (ELM), lower hydrogen recycling and impurity suppression. The critical spatial scale length of deuterium and helium particle interactions in lithium ranges between 5-100 nm depending on the incident particle energies at the edge and magnetic configuration. Lithium-based surfaces also range from liquid state to solid lithium coatings on a variety of substrates (e.g., graphite, stainless steel, refractory metal W/Mo/etc., or porous metal structures). Temperature-dependent effects from lithium-based surfaces as plasma facing components (PFC) include magnetohydrodynamic (MHD) instability issues related to liquid lithium, surface impurity, and deuterium retention issues, and anomalous physical sputtering increase at temperatures above lithium's melting point. The paper discusses the viability of lithium-based surfaces in future burning-plasma environments such as those found in ITER and DEMO-like fusion reactor devices.

Allain, Jean Paul; Taylor, Chase N. [School of Nuclear Engineering, Purdue University, 400 Central Avenue, West Lafayette, Indiana 47907 (United States)

2012-05-15T23:59:59.000Z

86

Heat pipe effect in porous medium  

SciTech Connect

In this thesis a parametric study of the thermal and hydrologic characteristics of the fractured porous tuffs at Yucca Mountain, Nevada was conducted. The effects of different fracture and matrix properties including permeability, thermal conductivity, specific heat, porosity, and tortuosity on heat pipe performance in the vicinity of the waste package were observed. Computer simulations were carried out using TOUGH code on a Cray YMP-2 supercomputer. None of the fracture parameters affected the heat pipe performance except the mobility of the liquid in the fracture. Matrix permeability and thermal conductivity were found to have significant effect on the heat pipe performance. The effect of mass injection was studied for liquid water and air injected at the fracture boundary. A high rate of mass injection was required to produce any effect on the heat pipe. The fracture-matrix equilibrium is influenced by the matrix permeability and the matrix thermal conductivity.

Joseph, M.

1992-12-01T23:59:59.000Z

87

Modeling Magnetically Excited and Magnetically Damped Liquid ...  

Science Conference Proceedings (OSTI)

The dynamic interaction of the turbulent flow with the oscillating interface needs to be accounted if it is required to levitate liquid metal of up to few kilograms ...

88

Excitations of superfluid 4 He in porous media: Aerogel and Vycor  

E-Print Network (OSTI)

Excitations of superfluid 4 He in porous media: Aerogel and Vycor O. Plantevin and B. Fa structure factor S(Q, ) and the elementary excitations of liquid 4 He immersed in aerogel and Vycor. In both and superfluid density, S(T), of liquid 4 He in aerogel and Vycor have been made over the past 30 years.1

Glyde, Henry R.

89

Novel Processing for Porous Ceramics  

Science Conference Proceedings (OSTI)

Oct 27, 2009 ... Macro-Porous Ceramics through Novel Processing Approaches: Tatsuki Ohji1; Manabu Fukushima1; Yu-ichi Yoshizawa1; 1National Institute of ...

90

Process for making film-bonded fuel cell interfaces  

DOE Patents (OSTI)

An improved interface configuration for use between adjacent elements of a fuel cell stack. The interface is impervious to gas and liquid and provides resistance to corrosion by the electrolyte of the fuel cell. A multi-layer arrangement for the interface provides bridging electrical contact with a hot-pressed resin filling the void space.

Kaufman, Arthur (West Orange, NJ); Terry, Peter L. (Chatham, NJ)

1990-07-03T23:59:59.000Z

91

Graphene Enhances Li Storage Capacity of Porous Single-crystalline Silicon Nanowires  

SciTech Connect

We demonstrated that graphene significantly enhances the reversible capacity of porous silicon nanowires used as the anode in Li-ion batteries. We prepared our experimental nanomaterials, viz., graphene and porous single-crystalline silicon nanowires, respectively, using a liquid-phase graphite exfoliation method and an electroless HF/AgNO{sub 3} etching process. The Si porous nanowire/graphene electrode realized a charge capacity of 2470 mAh g{sup -1} that is much higher than the 1256 mAh g{sup -1} of porous Si nanowire/C-black electrode and 6.6 times the theoretical capacity of commercial graphite. This relatively high capacity could originate from the favorable charge-transportation characteristics of the combination of graphene with the porous Si 1D nanostructure.

Wang, X.; Han, W.

2010-12-01T23:59:59.000Z

92

Buried Interface  

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

H. Ohldag, J. Lüning and J. Stöhr H. Ohldag, J. Lüning and J. Stöhr Computer hard drives and other advanced electronic devices depend on layered stacks of magnetic and non-magnetic materials, but researchers don't fully understand why such layered materials exhibit new properties that cannot be predicted from the properties of the individual layers. In a recent publication a team working at SSRL and the ALS describes new methods, based on x-ray spectroscopy and x-ray microscopy, that reveal the magnetic structures at the boundaries between these layers. Their data show that the boundaries are not as clean as previously assumed but a new ultrathin interface layer may be formed by a chemical reaction. The thickness of the interfacial layer is found to change with temperature and this change can be directly correlated with the magnetic properties of the multilayer stack. The work provides the first magnetic images of a buried interface and gives direct experimental evidence for the existence and long-assumed importance of interfacial magnetic spins.

93

Rigid porous filter  

DOE Patents (OSTI)

The present invention involves a porous rigid filter including a plurality of concentric filtration elements having internal flow passages and forming external flow passages there between. The present invention also involves a pressure vessel containing the filter for the removal of particulates from high pressure particulate containing gases, and further involves a method for using the filter to remove such particulates. The present filter has the advantage of requiring fewer filter elements due to the high surface area-to-volume ratio provided by the filter, requires a reduced pressure vessel size, and exhibits enhanced mechanical design properties, improved cleaning properties, configuration options, modularity and ease of fabrication.

Chiang, Ta-Kuan (Morgantown, WV); Straub, Douglas L. (Morgantown, WV); Dennis, Richard A. (Morgantown, WV)

2000-01-01T23:59:59.000Z

94

Corrosion resistance characterization of porous alumina membrane supports  

Science Conference Proceedings (OSTI)

Tubular porous alumina ceramic membrane supports were fabricated by an extrusion-drying-sintering process and then characterized in detail in terms of corrosion resistance in both H{sub 2}SO{sub 4} and NaOH aqueous solutions. Variations in the properties of the alumina supports such as mass loss percent, mechanical strength, open porosity and pore size distribution were studied before and after corrosion under different conditions. In addition, the microstructures were analyzed using scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction before and after corrosion. The fabricated porous alumina supports offer possibilities for some potential applications as micro-filtration or ultra-filtration membrane supports, as well as in the pre-treatment of strongly acidic industrial waste-liquids. - Research highlights: {yields} Porous alumina membrane supports fabricated by extrusion-drying-sintering process. {yields} Corrosion resistance in 20 wt.% H{sub 2}SO{sub 4} and 1, 5, 10 wt.% NaOH aqueous solutions. {yields} Rapid mass loss and loss of flexural strength occurred in hot NaOH solution. {yields} Resistant to strong acid corrosion with low mass loss, low flexural strength loss. {yields} Porous alumina supports have potential for treatment of strong acid waste liquids.

Dong Yingchao, E-mail: dongyc9@mail.ustc.edu.cn [Materials and Surface Science Institute (MSSI), University of Limerick, Limerick (Ireland); USTC Lab for Solid State Chemistry and Inorganic Membranes, Department of Materials Science and Engineering, University of Science and Technology of China (USTC) (China); Key Lab of Jiangxi Universities for Inorganic Membranes, National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic University (JCU) (China); Lin Bin [USTC Lab for Solid State Chemistry and Inorganic Membranes, Department of Materials Science and Engineering, University of Science and Technology of China (USTC) (China); Zhou Jianer [Key Lab of Jiangxi Universities for Inorganic Membranes, National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic University (JCU) (China); Zhang Xiaozhen [USTC Lab for Solid State Chemistry and Inorganic Membranes, Department of Materials Science and Engineering, University of Science and Technology of China (USTC) (China); Key Lab of Jiangxi Universities for Inorganic Membranes, National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic University (JCU) (China); Ling Yihan; Liu Xingqin; Meng Guangyao [USTC Lab for Solid State Chemistry and Inorganic Membranes, Department of Materials Science and Engineering, University of Science and Technology of China (USTC) (China); Hampshire, Stuart [Materials and Surface Science Institute (MSSI), University of Limerick, Limerick (Ireland)

2011-04-15T23:59:59.000Z

95

Mechanical Design of the NSTX Liquid Lithium Divertor  

Science Conference Proceedings (OSTI)

The Liquid Lithium Divertor (LLD) on NSTX will be the first test of a fully-toroidal liquid lithium divertor in a high-power magnetic confinement device. It will replace part of the lower outboard divertor between a specified inside and outside radius, and ultimately provide a lithium surface exposed to the plasma with enough depth to absorb a significant particle flux. There are numerous technical challenges involved in the design. The lithium layer must be as thin as possible, and maintained at a temperature between 200 and 400 degrees Celsius to minimize lithium evaporation. This requirement leads to the use of a thick copper substrate, with a thin stainless steel layer bonded to the plasma-facing surface. A porous molybdenum layer is then plasma-sprayed onto the stainless steel, to provide a coating that facilitates full wetting of the surface by the liquid lithium. Other challenges include the design of a robust, vacuumcompatible heating and cooling system for the LLD. Replacement graphite tiles that provided the proper interface between the existing outer divertor and the LLD also had to be designed, as well as accommodation for special LLD diagnostics. This paper describes the mechanical design of the LLD, and presents analyses showing the performance limits of the LLD.

R. Ellis, R. Kaita, H. Kugel, G. Paluzzi, M. Viola and R. Nygren

2009-02-19T23:59:59.000Z

96

Numerical prediction of interfacial instabilities: Sharp interface method (SIM)  

Science Conference Proceedings (OSTI)

We introduce a sharp interface method (SIM) for the direct numerical simulation of unstable fluid-fluid interfaces. The method is based on the level set approach and the structured adaptive mesh refinement technology, endowed with a corridor of irregular, ... Keywords: Gas-liquid interfaces, Instability-seeding in numerical simulations, Interfacial flows, Interfacial instability, Rayleigh-Taylor instability, Sharp-interface treatment, Viscous Kelvin-Helmholtz instability, Yih instability

R. R. Nourgaliev; M. -S. Liou; T. G. Theofanous

2008-04-01T23:59:59.000Z

97

Combustion in porous media  

DOE Green Energy (OSTI)

A 2.8-liter tube-shaped combustion vessel was constructed to study flame propagation and quenching in porous media. For this experiment, hydrogen-air flames propagating horizontally into abed of 6 mm diameter glass beads were studied. Measurements of pressure and temperature along the length of the tube were used to observe flame propagation of quenching. The critical hydrogen concentration for Hz-air mixtures was found to be 11.5%, corresponding to a critical Peclet number of Pe* = 37. This value is substantially less than the value of Pe* = 65 quoted in the literature, for example Babkin et al. (1991). It is hypothesized that buoyancy and a dependence of Pe on the Lewis number account for the discrepancy between these two results.

Dillon, J. [California Inst. of Technology, CA (US)

1999-09-01T23:59:59.000Z

98

Porous insulation in HVAC systems  

Science Conference Proceedings (OSTI)

Porous insulation used to line the air stream surfaces of HVAC equipment provides a locus for the accumulation of dirt and debris. Dirt and debris are hydrophilic and the insulation on the air stream surfaces of mechanical cooling systems thus provides a niche for mold growth. The mold growing on porous insulation unlike moldy debris on a hard surface such as sheetmetal cannot be removed by duct cleaning. Actions for proactively preventing biocontamination of HVAC insulation include the following. (1) Porous insulation shall not be used to line the air stream surfaces of HVAC plenums where wetting is likely such as in the vicinity of cooling coils

Philip R. Morey

1995-01-01T23:59:59.000Z

99

Liquid-permeable electrode  

DOE Patents (OSTI)

Electrodes for use in an electrolytic cell, which are liquid-permeable and have low electrical resistance and high internal surface area are provided of a rigid, porous, carbonaceous matrix having activated carbon uniformly embedded throughout. The activated carbon may be catalyzed with platinum for improved electron transfer between electrode and electrolyte. Activated carbon is mixed with a powdered thermosetting phenolic resin and compacted to the desired shape in a heated mold to melt the resin and form the green electrode. The compact is then heated to a pyrolyzing temperature to carbonize and volatilize the resin, forming a rigid, porous structure. The permeable structure and high internal surface area are useful in electrolytic cells where it is necessary to continuously remove the products of the electrochemical reaction.

Folser, George R. (Lower Burrell, PA)

1980-01-01T23:59:59.000Z

100

Liquid-permeable electrode  

SciTech Connect

Electrodes for use in an electrolytic cell, which are liquid-permeable and have low electrical resistance and high internal surface area are provided of a rigid, porous, carbonaceous matrix having activated carbon uniformly embedded throughout. The activated carbon may be catalyzed with platinum for improved electron transfer between electrode and electrolyte. Activated carbon is mixed with a powdered thermosetting phenolic resin and compacted to the desired shape in a heated mold to melt the resin and form the green electrode. The compact is then heated to a pyrolyzing temperature to carbonize and volatilize the resin, forming a rigid, porous structure. The permeable structure and high internal surface area are useful in electrolytic cells where it is necessary to continuously remove the products of the electrochemical reaction.

Folser, G.R.

1980-03-18T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Fabricating solid carbon porous electrodes from powders  

DOE Patents (OSTI)

Fabrication of conductive solid porous carbon electrodes for use in batteries, double layer capacitors, fuel cells, capacitive dionization, and waste treatment. Electrodes fabricated from low surface area (<50 m.sup.2 /gm) graphite and cokes exhibit excellent reversible lithium intercalation characteristics, making them ideal for use as anodes in high voltage lithium insertion (lithium-ion) batteries. Electrodes having a higher surface area, fabricated from powdered carbon blacks, such as carbon aerogel powder, carbon aerogel microspheres, activated carbons, etc. yield high conductivity carbon compositives with excellent double layer capacity, and can be used in double layer capacitors, or for capacitive deionization and/or waste treatment of liquid streams. By adding metallic catalysts to be high surface area carbons, fuel cell electrodes can be produced.

Kaschmitter, James L. (Pleasanton, CA); Tran, Tri D. (Livermore, CA); Feikert, John H. (Livermore, CA); Mayer, Steven T. (San Leandro, CA)

1997-01-01T23:59:59.000Z

102

Fabricating solid carbon porous electrodes from powders  

DOE Patents (OSTI)

Fabrication is described for conductive solid porous carbon electrodes for use in batteries, double layer capacitors, fuel cells, capacitive deionization, and waste treatment. Electrodes fabricated from low surface area (<50 m{sup 2}/gm) graphite and cokes exhibit excellent reversible lithium intercalation characteristics, making them ideal for use as anodes in high voltage lithium insertion (lithium-ion) batteries. Electrodes having a higher surface area, fabricated from powdered carbon blacks, such as carbon aerogel powder, carbon aerogel microspheres, activated carbons, etc. yield high conductivity carbon composites with excellent double layer capacity, and can be used in double layer capacitors, or for capacitive deionization and/or waste treatment of liquid streams. By adding metallic catalysts to high surface area carbons, fuel cell electrodes can be produced. 1 fig.

Kaschmitter, J.L.; Tran, T.D.; Feikert, J.H.; Mayer, S.T.

1997-06-10T23:59:59.000Z

103

Nonequilibrium Thermodynamics of Porous Electrodes  

E-Print Network (OSTI)

We reformulate and extend porous electrode theory for non-ideal active materials, including those capable of phase transformations. Using principles of non-equilibrium thermodynamics, we relate the cell voltage, ionic ...

Ferguson, Todd Richard

104

Electroosmosis in homogeneously charged micro- and nanoscale random porous media  

E-Print Network (OSTI)

used in generations of multiphase porous structures based onof various multiphase micro porous media including granularfor reproducing multiphase granular porous microstructures [

Wang, Moran; Chen, Shiyi

2007-01-01T23:59:59.000Z

105

Domain Decomposition for Flow in Porous Media with Fractures  

E-Print Network (OSTI)

this article. The fractures that we are concerned with are filled with debris so we consider them as porous media. The permeability in the fracture is large in comparison with that in the surrounding rock, so the fluid circulates faster in the fracture. Thus we have a highly heterogeneous porous medium. One idea that has been used to take this into account is to treat the fracture as an interface and to assume that the fluid that flows into the fracture stays in the fracture. In fact, in many models the contrast in permeabilities is of such an order that the flow outside of the fracture is neglected. However, here we are concerned with the situation in which the exchange between the fracture and the rest of the domain is significant. To deal with this case we need to model both what happens in the fracture and what happens outside the fracture. One

Clarisse Alboin; Jerome Jaffre; Jean Roberts; Christophe Serres

1999-01-01T23:59:59.000Z

106

Web Browser Interface (WBUI)  

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

ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) Documentation User Manual Web Browser Interface (WBUI) Web Service Interface (API) FAQ Design Specifications...

107

NETL: Water - Energy Interface  

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

Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Water - Energy Interface Innovations for Existing Plants Water - Energy Interface Previous Next...

108

Heat and mass transfer in unsaturated porous media. Final report  

DOE Green Energy (OSTI)

A preliminary study of heat and water transport in unsaturated porous media is reported. The project provides background information regarding the feasibility of seasonal thermal energy storage in unconfined aquifers. A parametric analysis of the factors of importance, and an annotated bibliography of research findings pertinent to unconfined aquifer thermal energy storage (ATES) are presented. This analysis shows that heat and mass transfer of water vapor assume dominant importance in unsaturated porous media at elevated temperature. Although water vapor fluxes are seldom as large as saturated medium liquid water fluxes, they are important under unsaturated conditions. The major heat transport mechanism for unsaturated porous media at temperatures from 50 to 90/sup 0/C is latent heat flux. The mechanism is nonexistent under saturated conditions but may well control design of unconfined aquifer storage systems. The parametric analysis treats detailed physical phenomena which occur in the flow systems study and demonstrates the temperature and moisture dependence of the transport coefficients of importance. The question of design of an unconfined ATES site is also addressed by considering the effects of aquifer temperature, depth to water table, porous medium flow properties, and surface boundary conditions. Recommendations are made for continuation of this project in its second phase. Both scientific and engineering goals are considered and alternatives are presented.

Childs, S.W.; Malstaff, G.

1982-02-01T23:59:59.000Z

109

Process for forming a porous silicon member in a crystalline silicon member  

DOE Patents (OSTI)

Fabrication and use of porous silicon structures to increase surface area of heated reaction chambers, electrophoresis devices, and thermopneumatic sensor-actuators, chemical preconcentrates, and filtering or control flow devices. In particular, such high surface area or specific pore size porous silicon structures will be useful in significantly augmenting the adsorption, vaporization, desorption, condensation and flow of liquids and gasses in applications that use such processes on a miniature scale. Examples that will benefit from a high surface area, porous silicon structure include sample preconcentrators that are designed to adsorb and subsequently desorb specific chemical species from a sample background; chemical reaction chambers with enhanced surface reaction rates; and sensor-actuator chamber devices with increased pressure for thermopneumatic actuation of integrated membranes. Examples that benefit from specific pore sized porous silicon are chemical/biological filters and thermally-activated flow devices with active or adjacent surfaces such as electrodes or heaters.

Northrup, M. Allen (Berkeley, CA); Yu, Conrad M. (Antioch, CA); Raley, Norman F. (Danville, CA)

1999-01-01T23:59:59.000Z

110

Chemistry & Physics at Interfaces | Advanced Materials | ORNL  

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

Oxide Interfaces Chemical Imaging Grain Boundaries Related Research Materials Synthesis from Atoms to Systems Materials Characterization Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science & Discovery | Advanced Materials | Research Areas | Chemistry and Physics at Interfaces SHARE Chemistry and Physics at Interfaces Chemical transformations and physical phenomena at gas, liquid and solid interfaces lie at the heart of today's energy technologies. They underpin ORNL's research strategies to deliver scientific discoveries and technical breakthroughs that will accelerate the development and deployment of solutions in clean energy. Understanding, predicting and controlling the structure, transport and reactivity at interfaces will lead to advances in

111

The VB5 interface  

Science Conference Proceedings (OSTI)

The VB5 interface is an ATM-based broadband interface at the ‘V’ reference point, the interface between a user access and a service node (SN), also known as the SNI (service node interface) within the ITU-T. The B-ISDN architectural model allows ...

M. A. Hale; A. T. Gillespie; K. A. James

1998-04-01T23:59:59.000Z

112

Innovations through Ceramic Processing by Tailoring Solid-Liquid ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Tailoring the solid-gas and solid-liquid interfaces of particles by ... By using principles found in natural composites, layered polymer/ceramic ...

113

CHAPTER ____ THE AIR-WATER INTERFACE: TURBULENCE  

E-Print Network (OSTI)

Transport processes at gas-liquid interfaces are of importance in a number of areas, such as for equipment polynomial fit to gas transfer data in terms of the wind velocity. Because of the nonlinear nature of the gas, natural convection associated with heat loss is an important factor in the field and clearly an area where

California at Santa Barbara, University of

114

On the transport of emulsions in porous media  

E-Print Network (OSTI)

tions related to multiphase ?ow in porous media. We haveof multiphase ?ow. Key words: emulsion, porous media,

Cortis, Andrea; Ghezzehei, Teamrat A.

2008-01-01T23:59:59.000Z

115

Corrosion protected, multi-layer fuel cell interface  

DOE Patents (OSTI)

An improved interface configuration for use between adjacent elements of a fuel cell stack. The interface is impervious to gas and liquid and provides resistance to corrosion by the electrolyte of the fuel cell. The multi-layer configuration for the interface comprises a non-cupreous metal-coated metallic element to which is film-bonded a conductive layer by hot pressing a resin therebetween. The multi-layer arrangement provides bridging electrical contact.

Feigenbaum, Haim (Ramat Ilan, IL); Pudick, Sheldon (Sayreville, NJ); Wang, Chiu L. (Edison, NJ)

1986-01-01T23:59:59.000Z

116

Spatially Resolved Porous Electrode Theory for Rechargeable ...  

Science Conference Proceedings (OSTI)

Symposium, Nanostructured Materials for Lithium Ion Batteries and for Supercapacitors. Presentation Title, Spatially Resolved Porous Electrode Theory for ...

117

Fabrication and Characterization of Reticulated, Porous Mesh ...  

Science Conference Proceedings (OSTI)

Feb 1, 2010 ... Fabrication and Characterization of Reticulated, Porous Mesh Arrays and Foams for Aerospace Applications by Additive Manufacturing Using ...

118

Hierarchical Template of Porous Carbon for Multifunctional ...  

Science Conference Proceedings (OSTI)

Hierarchical Template of Porous Carbon for Multifunctional Applications · Interstitial Hydride ... Structurally Dynamic Metal Organic Frameworks for CO2 Capture.

119

Metal recovery from porous materials  

DOE Patents (OSTI)

A method for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a porous matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF.sub.4 and HNO.sub.3 and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200.degree. C. The porous material can be pulverized before immersion to further increase the leach rate.

Sturcken, Edward F. (P.O. Box 900, Isle of Palms, SC 29451)

1992-01-01T23:59:59.000Z

120

Colloids and Surfaces A: Physicochem. Eng. Aspects 256 (2005) 207216 Retention of mineral colloids in unsaturated porous  

E-Print Network (OSTI)

and the liquid­gas interface were calculated based on their independently determined surface thermodynamic of colloidal particles were used: native Hanford colloids, Hanford colloids reacted with waste tank solutions that colloids did not adhere to the liquid­gas interface. Using the extended DLVO theory, free energies

Flury, Markus

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Process of preparing tritiated porous silicon  

DOE Patents (OSTI)

A process of preparing tritiated porous silicon in which porous silicon is equilibrated with a gaseous vapor containing HT/T.sub.2 gas in a diluent for a time sufficient for tritium in the gas phase to replace hydrogen present in the pore surfaces of the porous silicon.

Tam, Shiu-Wing (Downers Grove, IL)

1997-01-01T23:59:59.000Z

122

Metal recovery from porous materials  

DOE Patents (OSTI)

The present invention relates to recovery of metals. More specifically, the present invention relates to the recovery of plutonium and other metals from porous materials using microwaves. The United States Government has rights in this invention pursuant to Contract No. DE-AC09-89SR18035 between the US Department of Energy and Westinghouse Savannah River Company.

Sturcken, E.F.

1991-01-01T23:59:59.000Z

123

Macintosh human interface guidelines  

Science Conference Proceedings (OSTI)

Macintosh Human Interface Guidelines describes the way to create products that optimize the interaction between people and Macintosh computers. It explains the whys and hows of the Macintosh interface in general terms and specific details. Macintosh ...

Apple Computer, Inc.

1992-01-01T23:59:59.000Z

124

Visual Attentive Interfaces  

Science Conference Proceedings (OSTI)

Context-aware human-computer interfaces that rely on a person's attention as the primary input can be called attentive interfaces. Attention is epitomised by eye contact — eyes are not only scanning devices, they are constantly making social commentary ...

T. Selker

2004-10-01T23:59:59.000Z

125

Liquid-Liquid Extraction Processes  

E-Print Network (OSTI)

Liquid-liquid extraction is the separation of one or more components of a liquid solution by contact with a second immiscible liquid called the solvent. If the components in the original liquid solution distribute themselves differently between the two liquid phases, separation will result. This is the principle upon which separation by liquid-liquid extraction is based, and there are a number of important applications of this concept in industrial processes. This paper will review the basic concepts and applications as well as present future directions for the liquid-liquid extraction process.

Fair, J. R.; Humphrey, J. L.

1983-01-01T23:59:59.000Z

126

Mesoscopic predictions of the effective thermal conductivity for microscale random porous media.  

E-Print Network (OSTI)

microstructures of multiphase porous media. A latticeequation with complex multiphase porous geometries, aprobabilities. For multiphase porous media systems ?N ? 3?

Wang, Moran; Wang, Jinku; Pan, Ning; Chen, Shiyi

2007-01-01T23:59:59.000Z

127

Method of preparing thin porous sheets of ceramic material  

SciTech Connect

A method of forming thin porous sheets of ceramic material for use as electrodes or other components in a molten carbonate fuel cell is disclosed. The method involves spray drying a slurry of fine ceramic particles in liquid carrier to produce generally spherical agglomerates of high porosity and a rough surface texture. The ceramic particles may include the electrode catalyst and the agglomerates can be calcined to improve mechanical strength. After slurrying with suitable volatile material and binder tape casting is used to form sheets that are sufficiently strong for further processing and handling in the assembly of a high temperature fuel cell.

Swarr, Thomas E. (South Windsor, CT); Nickols, Richard C. (East Hartford, CT); Krasij, Myron (Avon, CT)

1987-03-24T23:59:59.000Z

128

Laboratory setup and results of experiments on two-dimensional multiphase flow in porous media  

Science Conference Proceedings (OSTI)

In the event of an accidental release into earth's subsurface of an immiscible organic liquid, such as a petroleum hydrocarbon or chlorinated organic solvent, the spatial and temporal distribution of the organic liquid is of great interest when considering efforts to prevent groundwater contamination or restore contaminated groundwater. An accurate prediction of immiscible organic liquid migration requires the incorporation of relevant physical principles in models of multiphase flow in porous media; these physical principles must be determined from physical experiments. This report presents a series of such experiments performed during the 1970s at the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland. The experiments were designed to study the transient, two-dimensional displacement of three immiscible fluids in a porous medium. This experimental study appears to be the most detailed published to date. The data obtained from these experiments are suitable for the validation and test calibration of multiphase flow codes. 73 refs., 140 figs.

McBride, J.F. (ed.) (Pacific Northwest Lab., Richland, WA (USA)); Graham, D.N. (ed.); Schiegg, H.O. (SIMULTEC Ltd., Meilen/Zurich (Switzerland))

1990-10-01T23:59:59.000Z

129

Metal recovery from porous materials  

DOE Patents (OSTI)

A method is described for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a porous matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF[sub 4] and HNO[sub 3] and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200 C. The porous material can be pulverized before immersion to further increase the leach rate.

Sturcken, E.F.

1992-10-13T23:59:59.000Z

130

POROUS WALL, HOLLOW GLASS MICROSPHERES  

DOE Green Energy (OSTI)

Hollow Glass Microspheres (HGM) is not a new technology. All one has to do is go to the internet and Google{trademark} HGM. Anyone can buy HGM and they have a wide variety of uses. HGM are usually between 1 to 100 microns in diameter, although their size can range from 100 nanometers to 5 millimeters in diameter. HGM are used as lightweight filler in composite materials such as syntactic foam and lightweight concrete. In 1968 a patent was issued to W. Beck of the 3M{trademark} Company for 'Glass Bubbles Prepared by Reheating Solid Glass Particles'. In 1983 P. Howell was issued a patent for 'Glass Bubbles of Increased Collapse Strength' and in 1988 H. Marshall was issued a patent for 'Glass Microbubbles'. Now Google{trademark}, Porous Wall, Hollow Glass Microspheres (PW-HGMs), the key words here are Porous Wall. Almost every article has its beginning with the research done at the Savannah River National Laboratory (SRNL). The Savannah River Site (SRS) where SRNL is located has a long and successful history of working with hydrogen and its isotopes for national security, energy, waste management and environmental remediation applications. This includes more than 30 years of experience developing, processing, and implementing special ceramics, including glasses for a variety of Department of Energy (DOE) missions. In the case of glasses, SRS and SRNL have been involved in both the science and engineering of vitreous or glass based systems. As a part of this glass experience and expertise, SRNL has developed a number of niches in the glass arena, one of which is the development of porous glass systems for a variety of applications. These porous glass systems include sol gel glasses, which include both xerogels and aerogels, as well as phase separated glass compositions, that can be subsequently treated to produce another unique type of porosity within the glass forms. The porous glasses can increase the surface area compared to 'normal glasses of a 1 to 2 order of magnitude, which can result in unique properties in areas such as hydrogen storage, gas transport, gas separations and purifications, sensors, global warming applications, new drug delivery systems and so on. One of the most interesting porous glass products that SRNL has developed and patented is Porous Wall, Hollow Glass Microspheres (PW-HGMs) that are being studied for many different applications. The European Patent Office (EPO) just recently notified SRS that the continuation-in-part patent application for the PW-HGMs has been accepted. The original patent, which was granted by the EPO on June 2, 2010, was validated in France, Germany and the United Kingdom. The microspheres produced are generally in the range of 2 to 100 microns, with a 1 to 2 micron wall. What makes the SRNL microspheres unique from all others is that the team in Figure 1 has found a way to induce and control porosity through the thin walls on a scale of 100 to 3000 {angstrom}. This is what makes the SRNL HW-HGMs one-of-a-kind, and is responsible for many of their unique properties and potential for various applications, including those in tritium storage, gas separations, H-storage for vehicles, and even a variety of new medical applications in the areas of drug delivery and MRI contrast agents. SRNL Hollow Glass Microspheres, and subsequent, Porous Wall, Hollow Glass Microspheres are fabricated using a flame former apparatus. Figure 2 is a schematic of the apparatus.

Sexton, W.

2012-06-30T23:59:59.000Z

131

Centrifuge Techniques and Apparatus for Transport Experiments in Porous Media  

SciTech Connect

This paper describes experimental approaches and apparatus that we have developed to study solute and colloid transport in porous media using Idaho National Laboratory's 2-m radius centrifuge. The ex-perimental techniques include water flux scaling with applied acceleration at the top of the column and sub-atmospheric pressure control at the column base, automation of data collection, and remote experimental con-trol over the internet. These apparatus include a constant displacement piston pump, a custom designed liquid fraction collector based on switching valve technology, and modified moisture monitoring equipment. Suc-cessful development of these experimental techniques and equipment is illustrated through application to transport of a conservative tracer through unsaturated sand column, with centrifugal acceleration up to 40 gs. Development of such experimental equipment that can withstand high accelerations enhances the centrifuge technique to conduct highly controlled unsaturated solute/colloid transport experiments and allows in-flight liquid sample collection of the effluent.

Earl D. Mattson; Carl D. Paler; Robert W. Smith; Markus Flury

2010-06-01T23:59:59.000Z

132

Activation of porous MOF materials  

DOE Patents (OSTI)

A method for the treatment of solvent-containing MOF material to increase its internal surface area involves introducing a liquid into the MOF in which liquid the solvent is miscible, subjecting the MOF to supercritical conditions for a time to form supercritical fluid, and releasing the supercritical conditions to remove the supercritical fluid from the MOF. Prior to introducing the liquid into the MOF, occluded reaction solvent, such as DEF or DMF, in the MOF can be exchanged for the miscible solvent.

Hupp, Joseph T; Farha, Omar K

2013-04-23T23:59:59.000Z

133

Transition to Three-dimensional Waves in Cocurrent Gas-liquid Flows  

E-Print Network (OSTI)

Chapter 1 Transition to Three-dimensional Waves in Cocurrent Gas-liquid Flows W. C. Kuru, M on the interface of a gas-liquid flow in a horizontal channel is studied experimentally. It is found of gas-liquid and liquid-liquid mixtures. For a general case, these flows will have at least 6

McCready, Mark J.

134

Web Browser Interface (WBUI)  

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

Browser Interface (WBUI) Browser Interface (WBUI) Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) OSCARS Case Study Documentation User Manual Web Browser Interface (WBUI) Web Service Interface (API) FAQ Design Specifications Functional Specifications Notifications Publications Authorization Policy Default Attributes Message Security Clients For Developers Interfaces Links Hardware Requirements DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Web Browser Interface (WBUI) 1. Login Before you can access the server you must login using the user name that

135

Porous Ceramics and Coatings - Programmaster.org  

Science Conference Proceedings (OSTI)

Oct 18, 2010 ... Gelcasting for Bulk, Laminate, and Porous Ceramics: Katherine Faber1; Noah Shanti1; 1Northwestern University Near-net forming gelcasting ...

136

Porous Coordination Polymer Composite Membranes for Gas ...  

Science Conference Proceedings (OSTI)

This novel architecture should allow the porous coordination polymer to sieve the gas molecules, while being bound into a sealable, gas-tight structure which is ...

137

Hierarchically Ordered Porous Carbon Films for Commercial ...  

for kinetic adsorption. The ORNL invention offers both a method for making new, hierarchically ordered porous carbon films and describes a capacitive deionization

138

POROUS SUBSTRATES FILLED WITH NANOMATERIALS - Energy ...  

A composition comprising: at least one porous carbon monolith, such as a carbon aerogel, comprising internal pores, and at least one nanomaterial, such as carbon ...

139

Gas sensor incorporating a porous framework  

DOE Patents (OSTI)

The disclosure provides sensor for gas sensing including CO.sub.2 gas sensors comprising a porous framework sensing area for binding an analyte gas.

Yaghi, Omar M.; Czaja, Alexander U.; Wang, Bo; Furukawa, Hiroyasu; Galatsis, Kosmas; Wang, Kang L.

2013-07-09T23:59:59.000Z

140

Digital Construction and Characterization of Reticulated Porous ...  

Science Conference Proceedings (OSTI)

In this approach, a porous structure is numerically generated starting with Powell's ... Application of Conical Beam X-Ray Tomography to Multi-Phase Materials.

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Hierarchically Ordered Porous Carbon Films for Commercial ...  

Technology Marketing Summary Porous carbon films that can be optimized and assembled as electrodes in a device to desalinate water have been ...

142

Mechanical Reliability Study on Porous Brittle Materials  

Science Conference Proceedings (OSTI)

Presentation Title, Mechanical Reliability Study on Porous Brittle Materials. Author(s), Xiaofeng Fan, Eldon D Case, Fei Ren, Yutian Shu, Melissa J Baumann .

143

THE RANDOM CHOICE METHOD FOR CALCULATING FLUID DISPLACEMENT IN A POROUS MEDIUM  

E-Print Network (OSTI)

Abstract Multiphase fluid displacement in a porous mediumIntroduction Multiphase fluid displacement in a porous

Albright, N.

2011-01-01T23:59:59.000Z

144

A Parallel Second-Order Adaptive Mesh Algorithm for Incompressible Flow in Porous Media  

E-Print Network (OSTI)

solving multiphase, incompressible ?ows in porous media. Wemultiphase, multicomponent incompressible ?ow in hetero- geneous porous

Pau, George Shu Heng

2009-01-01T23:59:59.000Z

145

Computing the Seismic Attenuation in Complex Porous Materials  

E-Print Network (OSTI)

and dispersion of compressional waves in ?uid- ?lled porous rocks with partial gasand dispersion of compressional waves in ?uid- ?lled porous rocks with partial gas

Masson, Yder Jean

2010-01-01T23:59:59.000Z

146

Supported liquid membrane system  

DOE Patents (OSTI)

A cell apparatus for a supported liquid membrane including opposing faceplates, each having a spirally configured groove, an inlet groove at a first end of the spirally configured groove, and an outlet groove at the other end of the spirally configured groove, within the opposing faces of the faceplates, a microporous membrane situated between the grooved faces of the faceplates, said microporous membrane containing an extractant mixture selective for a predetermined chemical species within the pores of said membrane, means for aligning the grooves of the faceplates in an directly opposing configuration with the porous membrane being situated therebetween, such that the aligned grooves form a pair of directly opposing channels, separate feed solution and stripping solution compartments connected to respective channels between the faceplates and the membrane, separate pumping means for passing feed solution and stripping solution through the channels is provided.

Takigawa, D.Y.; Bush, H. Jr.

1990-12-31T23:59:59.000Z

147

Porous Power Technologies LLC | Open Energy Information  

Open Energy Info (EERE)

Porous Power Technologies LLC Porous Power Technologies LLC Jump to: navigation, search Logo: Porous Power Technologies LLC Name Porous Power Technologies LLC Address 2765 Dagny Way, Suite 200 Place Lafayette, Colorado Zip 80026 Sector Efficiency Product Laminable, porous, absorbent Li-ion batteries Website http://www.porouspower.com/ Coordinates 40.0130129°, -105.1327972° 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":40.0130129,"lon":-105.1327972,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

148

Microelectromechanical pump utilizing porous silicon  

DOE Patents (OSTI)

A microelectromechanical (MEM) pump is disclosed which includes a porous silicon region sandwiched between an inlet chamber and an outlet chamber. The porous silicon region is formed in a silicon substrate and contains a number of pores extending between the inlet and outlet chambers, with each pore having a cross-section dimension about equal to or smaller than a mean free path of a gas being pumped. A thermal gradient is provided along the length of each pore by a heat source which can be an electrical resistance heater or an integrated circuit (IC). A channel can be formed through the silicon substrate so that inlet and outlet ports can be formed on the same side of the substrate, or so that multiple MEM pumps can be connected in series to form a multi-stage MEM pump. The MEM pump has applications for use in gas-phase MEM chemical analysis systems, and can also be used for passive cooling of ICs.

Lantz, Jeffrey W. (Albuquerque, NM); Stalford, Harold L. (Norman, OK)

2011-07-19T23:59:59.000Z

149

Transportation Storage Interface | Department of Energy  

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

Storage Interface Transportation Storage Interface Regulation of Future Extended Storage and Transportation. Transportation Storage Interface More Documents & Publications Status...

150

Teaching user interface prototyping  

Science Conference Proceedings (OSTI)

User interface prototyping is a proven technique for evaluating design alternatives and for obtaining user feedback. It is heavily employed by software development organizations. However, it is often ignored in computer science education. This paper ...

Charles E. Frank; David Naugler; Michael Traina

2005-06-01T23:59:59.000Z

151

METHOD OF IMPREGNATING A POROUS MATERIAL  

DOE Patents (OSTI)

A method of impregnating a porous body with an inorganic uranium- containing salt is outlined and comprises dissolving a water-soluble uranium- containing salt in water; saturating the intercommunicating pores of the porous body with the salt solution; infusing ammonia gas into the intercommunicating pores of the body, the ammonia gas in water chemically reacting with the water- soluble uranium-containing salt in the water solvent to form a nonwater-soluble uranium-containing precipitant; and evaporating the volatile unprecipitated products from the intercommunicating pores whereby the uranium-containing precipitate is uniformly distributed in the intercommunicating peres of the porous body.

Steele, G.N.

1960-06-01T23:59:59.000Z

152

Catalyst for hydrotreating carbonaceous liquids  

DOE Patents (OSTI)

A catalyst for denitrogenating and desulfurating carbonaceous liquid such as solvent refined coal includes catalytic metal oxides impregnated within a porous base of mostly alumina with relatively large pore diameters, surface area and pore volume. The base material includes pore volumes of 0.7-0.85 ml/g, surface areas of 200-350 m.sup.2 /g and pore diameters of 85-200 Angstroms. The catalytic metals impregnated into these base materials include the oxides of Group VI metals, molybdenum and tungsten, and the oxides of Group VIII metals, nickel and cobalt, in various combinations. These catalysts and bases in combination have effectively promoted the removal of chemically combined sulfur and nitrogen within a continuous flowing mixture of carbonaceous liquid and hydrogen gas.

Berg, Lloyd (Bozeman, MT); McCandless, Frank P. (Bozeman, MT); Ramer, Ronald J. (Idaho Falls, ID)

1982-01-01T23:59:59.000Z

153

Simulation of a Heat Transfer in Porous Media  

E-Print Network (OSTI)

We are motivated to model a heat transfer to a multiple layer regime and their optimization for heat energy resources. Such a problem can be modeled by a porous media with different phases (liquid and solid). The idea arose of a geothermal energy reservoir which can be used by cities, e.g. Berlin. While hot ground areas are covered to most high populated cites, the energy resources are important and a shift to use such resources are enormous. We design a model of the heat transport via the flow of water through the heterogeneous layer of the underlying earth sediments. We discuss a multiple layer model, based on mobile and immobile zones. Such numerical simulations help to economize on expensive physical experiments and obtain control mechanisms for the delicate heating process.

Juergen Geiser

2012-05-11T23:59:59.000Z

154

Porous Power Technologies | Open Energy Information  

Open Energy Info (EERE)

Porous Power Technologies Porous Power Technologies Jump to: navigation, search Name Porous Power Technologies Place Lafayette, Colorado Zip 80026 Product Porous Power is a Colorado-based developer of microporous, laminatable battery separators. Coordinates 42.706102°, -88.48126° 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":42.706102,"lon":-88.48126,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

155

Multiphase flow in fractured porous media  

Science Conference Proceedings (OSTI)

The major goal of this research project was to improve the understanding of the gas-oil two-phase flow in fractured porous media. In addition, miscible displacement was studied to evaluate its promise for enhanced recovery.

Firoozabadi, A.

1995-02-01T23:59:59.000Z

156

Electrolytic Infiltration into Laser Sintered Porous Graphite  

Science Conference Proceedings (OSTI)

Symposium, Green Technologies for Materials Manufacturing and Processing V. Presentation Title, Electrolytic Infiltration into Laser Sintered Porous Graphite ... Tensile and Fatigue Testing of 304 Stainless Steel after Gaseous Hydrogen ...

157

Porous polymeric materials for hydrogen storage  

DOE Patents (OSTI)

A porous polymer, poly-9,9'-spirobifluorene and its derivatives for storage of H.sub.2 are prepared through a chemical synthesis method. The porous polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.

Yu, Luping; Liu, Di-Jia; Yuan, Shengwen; Yang, Junbing

2013-04-02T23:59:59.000Z

158

Method for preparing porous metal hydride compacts  

DOE Patents (OSTI)

A method for preparing porous metallic-matrix hydride compacts which can be repeatedly hydrided and dehydrided without disintegration. A mixture of a finely divided metal hydride and a finely divided matrix metal is contacted with a poison which prevents the metal hydride from dehydriding at room temperature and atmospheric pressure. The mixture of matrix metal and poisoned metal hydride is then compacted under pressure at room temperature to form porous metallic-matrix hydride compacts.

Ron, M.; Gruen, D.M.; Mendelsohn, M.H.; Sheft, I.

1980-01-21T23:59:59.000Z

159

Three-dimensional effect on the effective thermal conductivity of porous media  

E-Print Network (OSTI)

conductivity of multiphase random porous media. The energymorphology of multiphase random porous media. Wang’sfor multiphase conjugate heat transfer through a porous

Wang, Moran R Dr.; Wang, J K; Pan, N; Chen, S Y; He, J H

2007-01-01T23:59:59.000Z

160

Mesoscopic simulations of phase distribution effects on the effective thermal conductivity of microgranular porous media  

E-Print Network (OSTI)

will be weakened. For multiphase porous media, the degree ofmicrostructures of multiphase porous media with emphasis onmaterials [38,39]. For multiphase porous media systems ( n ?

Wang, Moran Dr.; Pan, Ning; Wang, Jinku; Chen, Shiyi

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Efficient Schemes for Reducing Numerical Dispersion in Modeling Multiphase Transport through Porous and Fractured Media  

E-Print Network (OSTI)

within a fluid in a multiphase- porous-medium system isand radiation in a multiphase, multicomponent, porous mediumModeling Multiphase Transport through Porous and Fractured

Wu, Yu-Shu; Forsyth, Peter A.

2006-01-01T23:59:59.000Z

162

Analytical Solution to the Riemann Problem of Three-Phase Flow in Porous Media  

E-Print Network (OSTI)

properties governing multiphase ?ow in porous media. Waterof multicomponent, multiphase displacement in porous media.e?ects We study multiphase ?ow in porous media under the

Juanes, Ruben; Patzek, Tadeusz W.

2002-01-01T23:59:59.000Z

163

Derivation of effective macroscopic Stokes-Cahn-Hilliard equations for periodic immiscible flows in porous media  

E-Print Network (OSTI)

Using thermodynamic and variational principles we examine a basic phase field model for a mixture of two incompressible fluids in strongly perforated domains. With the help of the multiple scale method with drift and our recently introduced splitting strategy for Ginzburg-Landau/Cahn-Hilliard type equations [1], we rigorously derive an effective macroscopic phase field formulation under the assumption of periodic flow and a sufficiently large Peclet number. As for classical convection-diffusion problems, we obtain systematically diffusion-dispersion relations (including Taylor-Aris-dispersion). Our results also provide a convenient computational framework to macroscopically track interfaces in porous media. In view of the well-known versatility of phase field models, our study proposes a promising model for many engineering and scientific applications such as multiphase flows in porous media, microfluidics, and fuel cells.

Schmuck, Markus; Kalliadasis, Serafim

2012-01-01T23:59:59.000Z

164

Derivation of effective macroscopic Stokes-Cahn-Hilliard equations for periodic immiscible flows in porous media  

E-Print Network (OSTI)

Using thermodynamic and variational principles we examine a basic phase field model for a mixture of two incompressible fluids in strongly perforated domains. With the help of the multiple scale method with drift and our recently introduced splitting strategy for Ginzburg-Landau/Cahn-Hilliard-type equations [Schmuck et al., Proc. R. Soc. A 468:3705-3724, 2012.], we rigorously derive an effective macroscopic phase field formulation under the assumption of periodic flow and a sufficiently large P\\'eclet number. As for classical convection-diffusion problems, we obtain systematically diffusion-dispersion relations (including Taylor-Aris-dispersion). Our results also provide a convenient analytical and computational framework to macroscopically track interfaces in porous media. In view of the well-known versatility of phase field models, our study proposes a promising model for many engineering and scientific applications such as multiphase flows in porous media, microfluidics, and fuel cells.

Markus Schmuck; Marc Pradas; Gregorios A. Pavliotis; Serafim Kalliadasis

2012-10-23T23:59:59.000Z

165

On the interface instability during rapid evaporation in microgravity  

Science Conference Proceedings (OSTI)

The rapid evaporation of a superheated liquid (vapor explosion) under microgravity conditions is studied by direct numerical simulation. The time-dependent Navier-Stokes and energy equations coupled to the interface dynamics are solved using a two-dimensional finite-difference/front-tracking method. Large interface deformations, topology change, latent heat, surface tension and unequal material properties between the liquid and vapor phases are included in the simulations. A comparison of numerical results to the exact solution of a one-dimensional test problem shows excellent agreement. For the two-dimensional rapid evaporation problem, the vapor volume growth rate and unstable interface dynamics are studied for increasing levels of initial liquid superheat. As the superheat is increased the liquid-vapor interface experiences increasingly unstable energetic growth. These results indicate that heat transfer plays a very important role in the instability mechanism leading to vapor explosions. It is suggested that the Mullins-Sekerka instability could play a role in the instability initiation mechanism.

Juric, D. [Los Alamos National Lab., NM (United States). Theoretical Div.

1997-05-01T23:59:59.000Z

166

Interfacing to accelerator instrumentation  

SciTech Connect

As the sensory system for an accelerator, the beam instrumentation provides a tremendous amount of diagnostic information. Access to this information can vary from periodic spot checks by operators to high bandwidth data acquisition during studies. In this paper, example applications will illustrate the requirements on interfaces between the control system and the instrumentation hardware. A survey of the major accelerator facilities will identify the most popular interface standards. The impact of developments such as isochronous protocols and embedded digital signal processing will also be discussed.

Shea, T.J.

1995-12-31T23:59:59.000Z

167

SRNL POROUS WALL GLASS MICROSPHERES  

DOE Green Energy (OSTI)

The Savannah River National Laboratory (SRNL) has developed a new medium for storage of hydrogen and other gases. This involves fabrication of thin, Porous Walled, Hollow Glass Microspheres (PW-HGMs), with diameters generally in the range of 1 to several hundred microns. What is unique about the glass microballons is that porosity has been induced and controlled within the thin, one micron thick walls, on the scale of 10 to several thousand Angstroms. This porosity results in interesting properties including the ability to use these channels to fill the microballons with special absorbents and other materials, thus providing a contained environment even for reactive species. Gases can now enter the microspheres and be retained on the absorbents, resulting in solid-state and contained storage of even reactive species. Also, the porosity can be altered and controlled in various ways, and even used to filter mixed gas streams within a system. SRNL is involved in about a half dozen different programs involving these PW-HGMs and an overview of some of these activities and results emerging are presented.

Wicks, G; Leung Heung, L; Ray Schumacher, R

2008-04-15T23:59:59.000Z

168

Guidance Document Cryogenic Liquids  

E-Print Network (OSTI)

liquefies them. Cryogenic liquids are kept in the liquid state at very low temperatures. Cryogenic liquids are liquid nitrogen, liquid argon and liquid helium. The different cryogens become liquids under different. In addition, when they vaporize the liquids expand to enormous volumes. For example, liquid nitrogen

169

Unconventional human computer interfaces  

Science Conference Proceedings (OSTI)

This course focuses on how we can use the potential of the human body in experimental or unconventional interface techniques. It explores the biological or physiological characteristics of the separate parts of the body, from head to toe, and from skin ...

Steffi Beckhaus; Ernst Kruijff

2004-08-01T23:59:59.000Z

170

Silent speech interfaces  

Science Conference Proceedings (OSTI)

The possibility of speech processing in the absence of an intelligible acoustic signal has given rise to the idea of a 'silent speech' interface, to be used as an aid for the speech-handicapped, or as part of a communications system operating in silence-required ... Keywords: Cellular telephones, Silent speech, Speech pathologies, Speech recognition, Speech synthesis

B. Denby; T. Schultz; K. Honda; T. Hueber; J. M. Gilbert; J. S. Brumberg

2010-04-01T23:59:59.000Z

171

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen...  

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

Dry Ice vs. Liquid Nitrogen Previous Video (Dry Ice vs. Liquid Nitrogen) Frostbite Theater Main Index Next Video (Shattering Pennies) Shattering Pennies Liquid Nitrogen Cooled...

172

Definition of a facility for experimental studies of two-phase flows and heat transfer in porous materials  

DOE Green Energy (OSTI)

A facility-development effort is currently underway at Sandia National Laboratories in order to create an experimental capability for the study of two-phase, steam/water flows through a variety of porous media. The facility definition phase of this project is described. Equations are derived for the steady, adiabatic, macroscopically-linear two-phase flow of a single-component fluid through a porous medium, including energy transfer both by convection and conduction. These equations are then solved to give relative permeabilities for the steam and water phases as functions of known and/or measurable quantities. A viable experimental approach was thereby formulated, leading to the definition of facility components and instrumentation requirements, including the application of gamma-beam densitometry for the measurement of liquid-saturation distributions in porous media. Finally, a state-of-the-art computer code was utilized to numerically simulate the proposed experiments, providing an estimate of the facility operating envelope.

Reda, D.C.; Eaton, R.R.

1981-12-31T23:59:59.000Z

173

Asymptotic behavior of two-phase flows in heterogeneous porous media for capillarity depending only on space. II. Non-classical shocks to model oil-trapping  

E-Print Network (OSTI)

We consider a one-dimensional problem modeling two-phase flow in heterogeneous porous media made of two homogeneous subdomains, with discontinuous capillarity at the interface between them. We suppose that the capillary forces vanish inside the domains, but not on the interface. Under the assumption that the gravity forces and the capillary forces are oriented in opposite directions, we show that the limit, for vanishing diffusion, is not the entropy solution of the hyperbolic scalar conservation law. A non-classical shock occurs on the interface, modeling oil-trapping.

Cancès, Clément

2009-01-01T23:59:59.000Z

174

Easy-to-use interface  

SciTech Connect

Easy-to-use interfaces are a class of interfaces that fall between public access interfaces and graphical user interfaces in usability and cognitive difficulty. We describe characteristics of easy-to-use interfaces by the properties of four dimensions: selection, navigation, direct manipulation, and contextual metaphors. Another constraint we introduced was to include as little text as possible, and what text we have will be in at least four languages. Formative evaluations were conducted to identify and isolate these characteristics. Our application is a visual interface for a home automation system intended for a diverse set of users. The design will be expanded to accommodate the visually disabled in the near future.

Blattner, M M; Blattner, D O; Tong, Y

1999-04-01T23:59:59.000Z

175

Theoretical Studies of Non-Newtonian and Newtonian Fluid Flow through Porous Media  

E-Print Network (OSTI)

for Modeling Fluid and Heat Flow in Fractured Porous Media,"Newtonian fluid flow through porous or fractured media. The

Wu, Y.S.

1990-01-01T23:59:59.000Z

176

Low-frequency dilatational wave propagation through unsaturated porous media containing two immiscible fluids  

E-Print Network (OSTI)

of the porous medium frame K b , the multiphase interstitialin a porous medium to be represented by a single multiphase

Lo, W.-C.

2009-01-01T23:59:59.000Z

177

Upscaling solute transport in naturally fractured porous media with the continuous time random walk method  

E-Print Network (OSTI)

fracture model for multiphase ?ow in porous media. AIChEsingle- and multiphase transport in fractured porous media

Geiger, S.

2012-01-01T23:59:59.000Z

178

interface | OpenEI Community  

Open Energy Info (EERE)

interface Home Kyoung's picture Submitted by Kyoung(155) Contributor 7 January, 2013 - 10:09 Happy New Year analysis BHFS Colorado interface Legal review Texas As we welcome the...

179

Transient Steam Flow in Porous Media - Theory and Experiment  

SciTech Connect

The adsorption of steam in porous media, leading to a delay in steam pressure breakthrough, has been incorporated into a revised model of steam flow in a porous medium.

Herkelrath, W.N.; Moench, A.F.

1980-12-16T23:59:59.000Z

180

Investigation of polarization anisotropy in individual porous silicon nanoparticles  

Science Conference Proceedings (OSTI)

Polarization anisotropy is investigated in single porous silicon nanoparticles containing multiple chromophores. Two forms of nanoparticle samples are studied; low current density (LCD) and high current density (HCD). Photoluminescence measurements reveal ... Keywords: Anisotropy, Photoluminescence, Polarization, Porous silicon, Silicon nanocrystal

Daniel J. Gargas; Donald J. Sirbuly; Michael D. Mason; Paul J. Carson; Steven K. Buratto

2008-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Standard interface file handbook  

SciTech Connect

This handbook documents many of the standard interface file formats that have been adopted by the US Department of Energy to facilitate communications between and portability of, various large reactor physics and radiation transport software packages. The emphasis is on those files needed for use of the VENTURE/PC diffusion-depletion code system. File structures, contents and some practical advice on use of the various files are provided.

Shapiro, A.; Huria, H.C. (Cincinnati Univ., OH (United States))

1992-10-01T23:59:59.000Z

182

Virtual button interface  

DOE Patents (OSTI)

An apparatus and method of issuing commands to a computer by a user interfacing with a virtual reality environment. To issue a command, the user directs gaze at a virtual button within the virtual reality environment, causing a perceptible change in the virtual button, which then sends a command corresponding to the virtual button to the computer, optionally after a confirming action is performed by the user, such as depressing a thumb switch.

Jones, Jake S. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

183

Virtual button interface  

DOE Patents (OSTI)

An apparatus and method of issuing commands to a computer by a user interfacing with a virtual reality environment are disclosed. To issue a command, the user directs gaze at a virtual button within the virtual reality environment, causing a perceptible change in the virtual button, which then sends a command corresponding to the virtual button to the computer, optionally after a confirming action is performed by the user, such as depressing a thumb switch. 4 figs.

Jones, J.S.

1999-01-12T23:59:59.000Z

184

Flow of particle suspensions through porous media  

DOE Green Energy (OSTI)

A new attempt is made to study the mechanisms of particle invasions into porous media. The following subjects are described: A critical survey of the literature indicating that the mechanism of particle invasions is not known in sufficient detail. The pros and cons of existing particle measuring devices are briefly described. Results from a new laboratory study on particle characterizations are given. The results of the laboratory studies on the flow of particle suspensions through porous media (up to 200 md) are discussed. The effects of flow rate and particle concentrations on the amount of damage (i.e., permeability impairment) and depth of penetration (from core inlet towards outlet) are particularly emphasized. Filter methods (e.g., using millipore filter) cannot be used to determine particle invasions into porous medium. Any predictions of the injection problems based on millipore (or any other filter) measurements are useless and should be discarded.

Vetter, O.J.; Kandarpa, V.; Harouaka, A.

1982-06-22T23:59:59.000Z

185

Joining of porous silicon carbide bodies  

DOE Patents (OSTI)

A method of joining two porous bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the porous bodies, including the sintering aids, and a binder to initially join the porous bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.

Bates, Carl H. (Worcester, MA); Couhig, John T. (Worcester, MA); Pelletier, Paul J. (Thompson, CT)

1990-05-01T23:59:59.000Z

186

Fundamentals of Porous Materials from Development to Applications  

Science Conference Proceedings (OSTI)

About this Symposium. Meeting, Materials Science & Technology 2012. Symposium, Frontiers of Materials Science: Fundamentals of Porous Materials from ...

187

The Effect of Pressure in Gas Separations Utilizing Porous ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Porous graphene, a stable 2-D polyphenylene network resembling graphene with periodically missing benzene rings, has recently been  ...

188

Impact dynamics of porous powder. Final report  

SciTech Connect

The shock adiabats have been built experimentally in the range of moderate pressures for three porous materials: Al{sub 2}O{sub 3} wheat flour, and their mixture. The model, which describes the behavior of porous powder materials under large-amplitude dynamic loading, has been constructed. The model applicability to describing the shock wave processes is confirmed by good agreement of the calculated shock adiabats and the data obtained in the experiments. The compressive strength of compacted samples has been determined. The possible trend of further researches is presented in conclusion. 15 refs., 19 figs., 6 tabs.

Titov, V.M.

1995-12-31T23:59:59.000Z

189

Porous polymeric materials for hydrogen storage  

SciTech Connect

Porous polymers, tribenzohexazatriphenylene, poly-9,9'-spirobifluorene, poly-tetraphenyl methane and their derivatives for storage of H.sub.2 prepared through a chemical synthesis method. The porous polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.

Yu, Luping (Hoffman Estates, IL); Liu, Di-Jia (Naperville, IL); Yuan, Shengwen (Chicago, IL); Yang, Junbing (Westmont, IL)

2011-12-13T23:59:59.000Z

190

Porous polymeric materials for hydrogen storage  

DOE Patents (OSTI)

Porous polymers, tribenzohexazatriphenylene, poly-9,9'-spirobifluorene, poly-tetraphenyl methane and their derivatives for storage of H.sub.2 prepared through a chemical synthesis method. The porous polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.

Yu, Luping (Hoffman Estates, IL); Liu, Di-Jia (Naperville, IL); Yuan, Shengwen (Chicago, IL); Yang, Junbing (Westmont, IL)

2011-12-13T23:59:59.000Z

191

Bounds on Transport Coefficients of Porous Media  

DOE Green Energy (OSTI)

An analytical formulation of conductivity bounds by Bergman and Milton is used in a different way to obtain rigorous bounds on the real transport coefficients (electrical conductivity, thermal conductivity, and/or fluid permeability) of a fluid-saturated porous medium. These bounds do not depend explicitly on the porosity, but rather on two formation factors--one associated with the pore space and the other with the solid frame. Hashin-Shtrikman bounds for transport in random polycrystals of porous-material laminates will also be discussed.

Berryman, J G

2005-03-21T23:59:59.000Z

192

AC impedance analysis of Au/porous silicon contacts  

Science Conference Proceedings (OSTI)

In this paper we present the AC impedance analysis of Au/porous silicon contacts in order to investigate their conduction mechanisms. The porous silicon layer was obtained by electrochemical etching of the p-Si wafer. The measurements were made between ... Keywords: AC electrical conductivity, Electrical equivalent circuit, Porous silicon

F. Fonthal; T. Trifonov; A. Rodriguez; L. F. Marsal; J. Pallarès

2006-11-01T23:59:59.000Z

193

A Magnetomechanical Thermal Energy Harvester With A Reversible Liquid Interface  

E-Print Network (OSTI)

and Mechanical Model of a Thermal Energy Harvesting Device”,M, and Ferrari V. , “Thermal energy harvesting throughand G. P. Carman, “Thermal energy harvesting device using

He, Hong

2012-01-01T23:59:59.000Z

194

Photophysics of Two-dimensional Semiconductor Nanoparticle/Liquid Interfaces  

Science Conference Proceedings (OSTI)

These studies have investigated the optical properties of two very different types of two-dimensional semiconductor nanoclusters and superlattices of these nanoclusters.

Kelley, David F.

2003-11-14T23:59:59.000Z

195

A Magnetomechanical Thermal Energy Harvester With A Reversible Liquid Interface  

E-Print Network (OSTI)

difference. A series of piezoelectric energy harvesters withinto electrical energy by piezoelectric materials andinto electrical energy using piezoelectric materials. The

He, Hong

2012-01-01T23:59:59.000Z

196

Instabilities during liquid migration into superheated hydrothermal systems  

DOE Green Energy (OSTI)

Hydrothermal systems typically consist of hot permeable rock which contains either liquid or liquid and saturated steam within the voids. These systems vent fluids at the surface through hot springs, fumaroles, mud pools, steaming ground and geysers. They are simultaneously recharged as meteoric water percolates through the surrounding rock or through the active injection of water at various geothermal reservoirs. In a number of geothermal reservoirs from which significant amounts of hot fluid have been extracted and passed through turbines, superheated regions of vapor have developed. As liquid migrates through a superheated region of a hydrothermal system, some of the liquid vaporizes at a migrating liquid-vapor interface. Using simple physical arguments, and analogue laboratory experiments we show that, under the influence of gravity, the liquid-vapor interface may become unstable and break up into fingers.

Fitzgerald, Shaun D.; Woods, Andrew W.

1995-01-26T23:59:59.000Z

197

Method of making porous ceramic fluoride  

DOE Patents (OSTI)

A process for making a porous ceramic composite where fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, Robert H. (Knoxville, TN); Holcombe, Cressie E. (Farragut, TN)

1990-01-01T23:59:59.000Z

198

Heat and mass transfer in porous media  

DOE Green Energy (OSTI)

Field test data on the OOSI MR3 experiments are used as a basis for exhibiting the computational capabilities of the WAFE computer code, which is a generalized tool for the analysis of heat and mass transfer in multi-dimensional domains of porous geothermal materials.

Cook, T.L.; Harlow, F.H.; Travis, B.J.; Bartel, T.J.; Tyner, C.E.

1981-01-01T23:59:59.000Z

199

Zein Recovery Using Non-Porous Membranes  

DOE Patents (OSTI)

A membrane process for treating zein solutions to increase the zein concentration in the solution. The process uses a non-porous membrane that preferentially permeates the solvent and rejects the zein. Optionally, the process can be operated as a diafiltration process to yield a concentrate of high zein purity.

Mairal, Anurag P. (Fremont, CA); Ng, Alvin (Palo Alto, CA); Wijmans, Johannes G. (Menlo Park, CA)

2005-01-25T23:59:59.000Z

200

Porous ceramics and method for making  

DOE Patents (OSTI)

The fabrication of a porous ceramic composite is described. Fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, R.H.; Holcombe, C.E.

1989-06-08T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Multiple network interface core apparatus and method  

DOE Patents (OSTI)

A network interface controller and network interface control method comprising providing a single integrated circuit as a network interface controller and employing a plurality of network interface cores on the single integrated circuit.

Underwood, Keith D. (Albuquerque, NM); Hemmert, Karl Scott (Albuquerque, NM)

2011-04-26T23:59:59.000Z

202

Modeling of thermal transport properties of multiphase porous materials  

Science Conference Proceedings (OSTI)

This work presents a numerical framework for modeling thermal transport properties of multiphase porous materials with complex internal microstructures. The framework includes two steps. First, a random generation-growth algorithm is highlighted for reproducing multiphase microstructures, statistically equivalent to the actual systems, based on the geometrical and morphological information obtained from measurements and experimental estimations. Then a high-efficiency lattice Boltzmann solver for the corresponding governing equations is described, which, while assuring energy conservation and appropriate continuities at the interfaces in a complex system, has demonstrated its numerical power in yielding accurate solutions. Various applications are provided to validate the feasibility, effectiveness and robustness of this new framework by comparing the predictions with existing experimental data for different transport processes, accounting for the effects due to internal morphology, microstructural anisotropy, and multi phase interactions. The examples given also suggest potential applicability of this methodology to other problems as long as they are governed by similar partial differential equation(s). Thus, for given composition and structure, this numerical methodology is in essence a model built on sound physics principles with prior validity, without resorting to any ad hoc empirical treatment. Therefore, it is useful for design and optimization of new materials, beyond just predicting and analyzing the existing ones.

Wang, Moran [Los Alamos National Laboratory; Kang, Qinjun [Los Alamos National Laboratory; Robinson, Bruce [Los Alamos National Laboratory; Ning, Pan [UC DAVIS

2010-01-01T23:59:59.000Z

203

Deformation of a liquid surface due to an impinging gas jet: A conformal mapping approach  

E-Print Network (OSTI)

Deformation of a liquid surface due to an impinging gas jet: A conformal mapping approach Andong He on it. The problem of a gas jet impinging on a liquid surface arises in several important industrial and Stewart11 observed two types of instabilities of the gas-liquid system: oscillations of the interface

204

Nuclear data interface retrospective  

SciTech Connect

The Nuclear Data Interface (NDI) code library and data formats are the standards for multigroup nuclear data at Los Alamos National Laboratory. NDI's analysis, design, implementation, testing, integration, and maintenance required a ten person-year and ongoing effort by the Nuclear Data Team. Their efforts provide a unique, contemporary experience in producing a standard component library. In reflection upon that experience at NDI's decennial, we have identified several factors critical to NDI's success: it addressed real problems with appropriate simplicity, it fully supported all users, it added extra value through the code to the raw nuclear data, and its team went the distance from analysis through maintenance. In this report we review these critical success factors and discuss their implications for future standardization projects.

Gray, Mark G [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

205

The Common Communication Interface (CCI)  

SciTech Connect

There are many APIs for connecting and exchanging data between network peers. Each interface varies wildly based on metrics including performance, portability, and complexity. Specifically, many interfaces make design or implementation choices emphasizing some of the more desirable metrics (e.g., performance) while sacrificing others (e.g., portability). As a direct result, software developers building large, network-based applications are forced to choose a specific network API based on a complex, multi-dimensional set of criteria. Such trade-offs inevitably result in an interface that fails to deliver some desirable features. In this paper, we introduce a novel interface that both supports many features that have become standard (or otherwise generally expected) in other communication interfaces, and strives to export a small, yet powerful, interface. This new interface draws upon years of experience from network-oriented software development best practices to systems-level implementations. The goal is to create a relatively simple, high-level communication interface with low barriers to adoption while still providing important features such as scalability, resiliency, and performance. The result is the Common Communications Interface (CCI): an intuitive API that is portable, efficient, scalable, and robust to meet the needs of network-intensive applications common in HPC and cloud computing.

Shipman, Galen M [ORNL; Atchley, Scott [ORNL; Dillow, David A [ORNL; Geoffray, Patrick [ORNL; Bosilca, George [University of Tennessee, Knoxville (UTK); Squyres, Jeffrey M [ORNL; Minnich, Ronald [Sandia National Laboratories (SNL)

2011-01-01T23:59:59.000Z

206

Thin Films and Interfaces Committee  

Science Conference Proceedings (OSTI)

The Thin Films and Interfaces Committee is part of the Electronic, Magnetic, and Photonic Materials Division;. Our Mission: Promotes knowledge of the science ...

207

Interface Evolution under Mechanical Loading  

Science Conference Proceedings (OSTI)

Mar 12, 2012... video digital image correlation (DIC) to obtain full-field deformation mapping of dog-bone specimens perpendicular to the bonded interface.

208

BNL | CFN: Interface Science & Catalysis  

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

Interface Science & Catalysis Contact: Peter Sutter The world is facing unprecedented challenges in satisfying a rapidly growing demand for energy while reducing negative impacts...

209

Carbon films produced from ionic liquid carbon precursors  

Science Conference Proceedings (OSTI)

The invention is directed to a method for producing a film of porous carbon, the method comprising carbonizing a film of an ionic liquid, wherein the ionic liquid has the general formula (X.sup.+a).sub.x(Y.sup.-b).sub.y, wherein the variables a and b are, independently, non-zero integers, and the subscript variables x and y are, independently, non-zero integers, such that ax=by, and at least one of X.sup.+ and Y.sup.- possesses at least one carbon-nitrogen unsaturated bond. The invention is also directed to a composition comprising a porous carbon film possessing a nitrogen content of at least 10 atom %.

Dai, Sheng; Luo, Huimin; Lee, Je Seung

2013-11-05T23:59:59.000Z

210

Molecular Design of Branched and Binary Molecules at Ordered Interfaces  

SciTech Connect

This study examined five different branched molecular architectures to discern the effect of design on the ability of molecules to form ordered structures at interfaces. Photochromic monodendrons formed kinked packing structures at the air-water interface due to the cross-sectional area mismatch created by varying number of alkyl tails and the hydrophilic polar head group. The lower generations formed orthorhombic unit cell with long range ordering despite the alkyl tails tilted to a large degree. Favorable interactions between liquid crystalline terminal groups and the underlying substrate were observed to compel a flexible carbosilane dendrimer core to form a compressed elliptical conformation which packed stagger within lamellae domains with limited short range ordering. A twelve arm binary star polymer was observed to form two dimensional micelles at the air-water interface attributed to the higher polystyrene block composition. Linear rod-coil molecules formed a multitude of packing structures at the air-water interface due to the varying composition. Tree-like rod-coil molecules demonstrated the ability to form one-dimensional structures at the air-water interface and at the air-solvent interface caused by the preferential ordering of the rigid rod cores. The role of molecular architecture and composition was examined and the influence chemically competing fragments was shown to exert on the packing structure. The amphiphilic balance of the different molecular series exhibited control on the ordering behavior at the air-water interface and within bulk structures. The shell nature and tail type was determined to dictate the preferential ordering structure and molecular reorganization at interfaces with the core nature effect secondary.

Kirsten Larson Genson

2005-12-27T23:59:59.000Z

211

A unified numerical framework model for simulating flow, transport, and heat transfer in porous and fractured media  

E-Print Network (OSTI)

or chemical species in a multiphase porous medium system canand radiation in a multiphase, multicomponent, porous mediummultiphase flow, multicomponent transport, and heat transfer in porous

Wu, Yu-Shu

2004-01-01T23:59:59.000Z

212

Numerical simulation of single-phase and multiphase non-Darcy flow in porous and fractured reservoirs  

E-Print Network (OSTI)

well tests, multiphase flow, porous and fracturedin modeling multiphase flow in porous and fractured media,”description of multiphase flow through porous media: S w + S

Wu, Yu-Shu

2000-01-01T23:59:59.000Z

213

Plasma Propagation Through Porous Dielectric Sheets  

E-Print Network (OSTI)

Abstract—The propagation of plasmas through porous materials is one extreme example of a packed-bed reactor. Mechanisms for atmospheric-pressure plasmas flowing through porous dielectric films are computationally investigated. Images of this plasma flow are discussed. Index Terms—Photoionization, plasma functionalization. ATMOSPHERIC-PRESSURE plasmas (APPs) in dielectric barrier discharge (DBD) configurations are widely used for remediation of toxic gases. One such configuration is a packed-bed reactor where the plasma flows along the surface of high-dielectric-constant (?) beads where electric fields are intensified by the gradient in ? [1]. Typical DBD plasmas operate in air at atmospheric pressure at a few to tens of kilohertz, having electrode separations of a few millimeters to a centimeter. One extreme example of a packed-bed DBD reactor

Mingmei Wang; John E. Foster; Mark J. Kushner

2011-01-01T23:59:59.000Z

214

Porous fission fragment tracks in fluorapatite  

Science Conference Proceedings (OSTI)

Fission tracks caused by the spontaneous fission of {sup 238}U in minerals, as revealed by chemical etching, are extensively used to determine the age and thermal history of Earth's crust. Details of the structure and annealing of tracks at the atomic scale have remained elusive, as the original track is destroyed during chemical etching. By combining transmission electron microscopy with in situ heating, we demonstrate that fission tracks in fluorapatite are actually porous tubes, instead of having an amorphous core, as generally assumed. Direct observation shows thermally induced track fragmentation in fluoapatite, in clear contrast to the amorphous tracks in zircon, which gradually ''fade'' without fragmentation. Rayleigh instability and the thermal emission of vacancies control the annealing of porous fission tracks in fluorapatite.

Li Weixing; Ewing, Rodney C. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005 (United States); Wang Lumin [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Sun Kai [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Lang, Maik [Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005 (United States); Trautmann, Christina [GSI Helmholtz Centre for Heavy Ion Research, Planckstr. 1, 64291 Darmstadt (Germany)

2010-10-01T23:59:59.000Z

215

Experimentally Measured Interfacial Area during Gas Injection into Saturated Porous Media: An Air Sparging Analogy  

Science Conference Proceedings (OSTI)

The amount of interfacial area (awn) between air and subsurface liquids during air-sparging can limit the rate of site remediation. Lateral movement within porous media could be encountered during air-sparging operations when air moves along the bottom of a low-permeability lens. This study was conducted to directly measure the amount of awn between air and water flowing within a bench-scale porous flow cell during the lateral movement of air along the upper edge of the cell during air injections into an initially water-saturated flow cell. Four different cell orientations were used to evaluate the effect of air injection rates and porous media geometries on the amount of awn between fluids. Air was injected at flow rates that varied by three orders of magnitude, and for each flow cellover this range of injection rates little change in awn was noted. A wider variation in awn was observed when air moved through different regions for the different flow cell orientations. These results are in good agreement with the experimental findings of Waduge et al. (2007), who performed experiments in a larger sand-pack flow cell, and determined that air-sparging efficiency is nearly independent of flow rate but highly dependent on the porous structure. By directly measuring the awn, and showing that awn does not vary greatly with changes in injection rate, we show that the lack of improvement to remediation rates is because there is a weak dependence of the awn on the air injection rate.

Crandall, Dustin; Ahmadi, Goodarz; Smith, Duane H., Bromhal, Grant

2010-01-01T23:59:59.000Z

216

Liquid electrode  

DOE Patents (OSTI)

A dropping electrolyte electrode for use in electrochemical analysis of non-polar sample solutions, such as benzene or cyclohexane. The liquid electrode, preferably an aqueous salt solution immiscible in the sample solution, is introduced into the solution in dropwise fashion from a capillary. The electrolyte is introduced at a known rate, thus, the droplets each have the same volume and surface area. The electrode is used in making standard electrochemical measurements in order to determine properties of non-polar sample solutions.

Ekechukwu, Amy A. (Augusta, GA)

1994-01-01T23:59:59.000Z

217

Pore-scale analysis of solubilization and mobilization of trapped NAPL blobs in porous media  

E-Print Network (OSTI)

NAPL (non-aqueous phase liquid) blob mobilization and solubilization models were developed to predict residual NAPL fate and describe flow dynamics of various displacing phases (water and surfactant foam). The models were achieved by pore-scale mass and force balances and were focused on the understanding of the physico-chemical interactions between NAPL blobs and the displacing phases. The pore-level mass balance indicated changes in NAPL saturation instead of mass reduction occurring with blob solubilization. The force balance was used to explain the complex flow configurations among NAPL blobs and the displacing phases. Some factors such as the wettability and the spreading/entering coefficients were useful in determining flow configurations. From the models developed in this study, dimensional analysis was performed to identify NAPL blob motion during water or surfactant foam flooding. In non-dimensionalized forms, a Trapping number employed as an indicator of blob displacement performance was modified to quantify the onset of blob mobilization. Its value for water flooding was nearly 2-3 orders of magnitude greater than that of surfactant foam flooding. Next, to investigate the blob flow regime in porous media, a blob velocity was computed. Regardless of the displacing phases, a blob’s velocity increased with increasing blob sizes after commencement of blob motion, and the velocity of DNAPL (dense non-aqueous phase liquid) blobs was greater than that of LNAPL (light non-aqueous phase liquid) blobs. From this investigation, it is expected that the pore-scale solubilization and mobilization models would provide better understanding leading to a predictive capability for the flow behavior of NAPL blobs removed by various displacing phases in a porous medium. Additionally, the models based on newly approached concepts and modified governing equations would be useful in conceptualization, as well as the model prediction of other immiscible or miscible fluids flowing through a porous medium. Further, the models developed in our study would be a useful contribution to the study of small-scale contaminants or substances such as particle and bacterial transport in porous media.

Yoon, Sun Hee

2007-08-01T23:59:59.000Z

218

SPUTTERING FROM A POROUS MATERIAL BY PENETRATING IONS  

Science Conference Proceedings (OSTI)

Porous materials are ubiquitous in the universe and weathering of porous surfaces plays an important role in the evolution of planetary and interstellar materials. Sputtering of porous solids in particular can influence atmosphere formation, surface reflectivity, and the production of the ambient gas around materials in space. Several previous studies and models have shown a large reduction in the sputtering of a porous solid compared to the sputtering of the non-porous solid. Using molecular dynamics simulations we study the sputtering of a nanoporous solid with 55% of the solid density. We calculate the electronic sputtering induced by a fast, penetrating ion, using a thermal spike representation of the deposited energy. We find that sputtering for this porous solid is, surprisingly, the same as that for a full-density solid, even though the sticking coefficient is high.

Rodriguez-Nieva, J. F. [Instituto Balseiro, Universidad Nacional de Cuyo, 8400 Bariloche (Argentina); Bringa, E. M. [CONICET and Instituto de Ciencias Basicas, Universidad Nacional de Cuyo, 5500 Mendoza (Argentina); Cassidy, T. A. [CalTech/JPL, Pasadena, CA 91109 (United States); Johnson, R. E.; Fama, M.; Baragiola, R. A. [Laboratory for Atomic and Surface Physics, University of Virginia, Charlottesville, VA 22903 (United States); Caro, A. [Los Alamos National Laboratory, Los Alamos, NM 94551 (United States); Loeffler, M. J. [NASA Goddard Space Flight Center, Astrochemistry Branch, Code 691, Greenbelt, MD 20771 (United States); Farkas, D. [Department of Materials Sciences, Virginia Tech, Blacksburg, VA 24061 (United States)

2011-12-10T23:59:59.000Z

219

Porous Polymer Coatings: a Versatile Approach to ...  

The low surface energy of apolar liquids makes super- ... membrane only diesel fuel passes through it by gravity and it can

220

Li batteries with porous sol-gel cathodes  

Science Conference Proceedings (OSTI)

The structure presented is a high-capacity micro battery, lithium based, consisting of porous cathode, solid electrolyte and silver anode. A spinel LiNi"0"."4La"0"."1Mn"1"."5O"4 sol-gel layer was deposited on a porous ceramic substrate to give high specific ... Keywords: Layer oxides, Li ion batteries, Porous cathode, Sol-gel

Antonela Dima; Francesco Della Corte; Maurizio Casalino; Ivo Rendina

2007-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Malicious interface design: exploiting the user  

Science Conference Proceedings (OSTI)

In an ideal world, interface design is the art and science of helping users accomplish tasks in a timely, efficient, and pleasurable manner. This paper studies the inverse situation, the vast emergence of deliberately constructed malicious interfaces ... Keywords: adversarial interface design, design principles, evil interfaces, malicious interfaces, web usability guidelines

Gregory Conti; Edward Sobiesk

2010-04-01T23:59:59.000Z

222

A7: Adaptive Porous Materials for Gas Storage  

Science Conference Proceedings (OSTI)

The presentation will report the synthesis of alternative porous materials, ... A14: Study on the Combustion Characteristics and Kinetics of Pulverized Coal in ...

223

High Co2 Emissions Through Porous Media- Transport Mechanisms...  

Open Energy Info (EERE)

Page Edit with form History Facebook icon Twitter icon High Co2 Emissions Through Porous Media- Transport Mechanisms And Implications For Flux Measurement And Fractionation Jump...

224

Ice-templated Porous Ceramic Structures for Energy Applications  

Science Conference Proceedings (OSTI)

We have studied the ice-templating method for filters and battery electrode applications with the hierarchical pore structure. The porous Si structure was ...

225

Towards improved methods for determining porous media multiphase flow functions.  

E-Print Network (OSTI)

??The mathematical modeling and simulation of the flow of fluid through porous media are important in many areas. Relative permeability and capillary pressure functions are… (more)

Xue, Song

2004-01-01T23:59:59.000Z

226

Modeling multiphase flow in porous medium systems at multiple scales.  

E-Print Network (OSTI)

??Problems involving multiphase flow and transport in porous media arise in a number of scientific and engineering applications including oil reservoir engineering and groundwater remediation.… (more)

Li, Huina.

2006-01-01T23:59:59.000Z

227

013 Characterization of the Sintered Porous Zirconia Dissolves the ...  

Science Conference Proceedings (OSTI)

Porous zirconia was synthesized in order to overcome this problem. To avoid .... 166 Multi-Phase-Field Simulation in a Low Carbon Steel for Continuous Cooling  ...

228

Human Liver Cell Culturing in Porous Hydroxyapatite/Hydrogel ...  

Science Conference Proceedings (OSTI)

Effect of Cold Work and Aging on a Cobalt-Nickel Based Multiphase Alloy ... Freeze-Cast Preparation of Porous Bioceramics with Controlled Silver Release.

229

Fabrication of Highly Porous Alumina Prepared by Gelation ...  

Science Conference Proceedings (OSTI)

Author(s), Manabu Fukushima, Sakae Tsuda, Yu-ichi Yoshizawa. On-Site Speaker (Planned), Manabu Fukushima. Abstract Scope, Macro-porous alumina

230

Liquid electrode  

DOE Patents (OSTI)

A dropping electrolyte electrode is described for use in electrochemical analysis of non-polar sample solutions, such as benzene or cyclohexane. The liquid electrode, preferably an aqueous salt solution immiscible in the sample solution, is introduced into the solution in dropwise fashion from a capillary. The electrolyte is introduced at a known rate, thus, the droplets each have the same volume and surface area. The electrode is used in making standard electrochemical measurements in order to determine properties of non-polar sample solutions. 2 figures.

Ekechukwu, A.A.

1994-07-05T23:59:59.000Z

231

Flow-Assisted Flame Propagation Through a Porous Combustible in Microgravity  

E-Print Network (OSTI)

P.J. Pagni and T.G. Peterson, “Flame Spread Through PorousT. Niioka, ”Flow-Assisted Flame Propagation Through a PorousMarch 2002 Flow-Assisted Flame Propagation Through a Porous

Bar-Ilan, Amnon; Rich, David B; Rein, Guillermo; Fernandez-Pello, Carlos; Hanai, H.; Niioka, T.

2002-01-01T23:59:59.000Z

232

Theoretical Studies of Non-Newtonian and Newtonian Fluid Flow through Porous Media  

E-Print Network (OSTI)

of Multicomponent, Multiphase Displacement in Porous Media,"C. M. (1981) : Multiphase Flow in Porous Media, Technip,porous media can always be considered as a special case of the multiphase

Wu, Y.S.

1990-01-01T23:59:59.000Z

233

Non-darcy flow behavior mean high-flux injection wells in porous and fractured formations  

E-Print Network (OSTI)

Phase and Multiphase Non-Darcy Flow in Porous and FracturedFormulation A multiphase system in a porous or fracturedand multiphase non-Darcy flow in multidimensional porous and

Wu, Yu-Shu

2003-01-01T23:59:59.000Z

234

Interface physics in microporous media : LDRD final report.  

Science Conference Proceedings (OSTI)

This document contains a summary of the work performed under the LDRD project entitled 'Interface Physics in Microporous Media'. The presence of fluid-fluid interfaces, which can carry non-zero stresses, distinguishes multiphase flows from more readily understood single-phase flows. In this work the physics active at these interfaces has been examined via a combined experimental and computational approach. One of the major difficulties of examining true microporous systems of the type found in filters, membranes, geologic media, etc. is the geometric uncertainty. To help facilitate the examination of transport at the pore-scale without this complication, a significant effort has been made in the area of fabrication of both two-dimensional and three-dimensional micromodels. Using these micromodels, multiphase flow experiments have been performed for liquid-liquid and liquid-gas systems. Laser scanning confocal microscopy has been utilized to provide high resolution, three-dimensional reconstructions as well as time resolved, two-dimensional reconstructions. Computational work has focused on extending lattice Boltzmann (LB) and finite element methods for probing the interface physics at the pore scale. A new LB technique has been developed that provides over 100x speed up for steady flows in complex geometries. A new LB model has been developed that allows for arbitrary density ratios, which has been a significant obstacle in applying LB to air-water flows. A new reduced order model has been developed and implemented in finite element code for examining non-equilibrium wetting in microchannel systems. These advances will enhance Sandia's ability to quantitatively probe the rich interfacial physics present in microporous systems.

Yaklin, Melissa A.; Knutson, Chad E.; Noble, David R.; Aragon, Alicia R.; Chen, Ken Shuang; Giordano, Nicholas J. (Purdue University, West Lafayette, IN); Brooks, Carlton, F.; Pyrak-Nolte, Laura J. (Purdue University, West Lafayette, IN); Liu, Yihong (Purdue University, West Lafayette, IN)

2008-09-01T23:59:59.000Z

235

Appendix 9 - iManage Interfaces  

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

8 - iManage Interfaces 8 - iManage Interfaces STARS, STRIPES, IDW/iPortal utilize a number of internal and external interfaces to interconnect and share information within iManage, and other systems, both DOE and non-DOE. The PWS is not limited to the interfaces listed below as other interfaces may be required to be developed and/or supported during the performance of this contract. The current interfaces are described below. STARS The STARS interface programs utilize standard API's and Interface tables built into the Oracle Applications E-Business software suite. Standard Concurrent Requests within the financial system are configured to process the interface records once they are loaded into the interface tables. Successful interface records that process through the interface API's are inserted and

236

Emergent Phenomena at Complex Oxide Interfaces  

E-Print Network (OSTI)

Complex Oxide Interfaces by Pu Yu A dissertation submittedOxide Interfaces Copyright 2011 by Pu Yu Abstract Emergentat Complex Oxide Interfaces by Pu Yu Doctor of Philosophy in

Yu, Pu

2011-01-01T23:59:59.000Z

237

Cohesion Web Interface to EmStar  

E-Print Network (OSTI)

Networked Sensing Cohesion: Web Interface to EmStar SaharSolution: Easy to Use Web Interface Title of Interface:of CGI-based World Wide Web applications. Common Gateway

Sahar Kashef; Jia Ning (Jane) Qu; Karen Weeks

2005-01-01T23:59:59.000Z

238

The Bevatron liquid nitrogen circulation system  

SciTech Connect

A nitrogen liquefier and computer controlled valving system have been added to the Bevatron cryoliner vacuum system to cut operating costs by reducing liquid nitrogen consumption. The computer and interface electronic systems, which control the temperatures of twenty-eight liquid nitrogen circuits, have been chosen and designed to operate in the Bevatron's pulsating magnetic field. The nitrogen exhaust is routed back to a liquefier, of about five kilowatt capacity, liquefied, and rerouted through the cooling circuits. A description of the system and operating results are presented.

Hunt, D.; Stover, G.

1987-03-01T23:59:59.000Z

239

Capillary Rise and Imbibition of Liquids in Nanoporous Matrices: Rheological Concepts and Experiments  

E-Print Network (OSTI)

Liquid flow propelled by capillary forces is one of the most important transport mechanisms in porous environments. It is governed by a fascinating interplay of interfacial, viscous drag as well as gravitational forces which liquids encounter upon invasion into geometries with often complex topologies, such as capillary networks of trees or interconnected fractures in soils and ice. Here, we present fundamentals, concepts and an experimental, gravimetric study on the capillarity-driven invasion dynamics of liquids in networks of pores a few nanometers across in monolithic, nanoporous silica glass (porous Vycor). A variation of the complexity of the building blocks of the liquids investigated along with a variation of the humidity and the temperature upon spontaneous imbibition allows us to gain information regarding the fluidity and capillarity of liquids in such nanoporous environments. We observe square-root of time imbibition dynamics for all liquids applied, which we can quantitatively describe by both a conserved bulk fluidity in the pore center and bulk capillarity at the advancing menisci, if we assume a sticky boundary layer (negative velocity slip length). Moreover, pecularities of nanopore-confined liquids, such as transport via the vapor phase leading to preadsorbed liquid layers, have to be properly accounted for. Upon increasing the chain-length in the case of the n-alkanes, we found hints towards a transition from stick- to slip-flow at the pore walls with increasing chain-length and thus polymeric behavior. Meniscus freezing is reported for n-tetracosane confined in porous Vycor. For the rheology of a rod-like liquid nematogen (8OCB) we found no hints of the viscosity drop upon entering into the nematic phase, typical of the bulk rheology of this liquid crystal.

Simon Gruener; Patrick Huber

2010-05-05T23:59:59.000Z

240

Characterizing unsaturated diffusion in porous tuff gravel  

SciTech Connect

Evaluation of solute diffusion in unsaturated porous gravel is very important for investigations of contaminant transport and remediation, risk assessment, and waste disposal (for example, the potential high-level nuclear waste repository at Yucca Mountain, Nevada). For a porous aggregate medium such as granular tuff, the total water content is comprised of surface water and interior water. The surface water component (water film around grains and pendular water between the grain contacts) could serve as a predominant diffusion pathway. To investigate the extent to which surface water films and contact points affect solute diffusion in unsaturated gravel, we examined the configuration of water using x-ray computed tomography in partially saturated gravel, and made quantitative measurements of diffusion at multiple water contents using two different techniques. In the first, diffusion coefficients of potassium chloride in 2-4 mm granular tuff at multiple water contents were calculated from electrical conductivity measurements using the Nernst-Einstein equation. In the second, we used laser ablation with inductively coupled plasma-mass spectrometry to perform micro-scale mapping, allowing the measurement of diffusion coefficients for a mixture of chemical tracers for tuff cubes and tetrahedrons having two contact geometries (cube-cube and cube-tetrahedron). The x-ray computed tomography images show limited contact between grains, and this could hinder the pathways for diffusive transport. Experimental results show the critical role of surface water in controlling transport pathways and hence the magnitude of diffusion. Even with a bulk volumetric water content of 1.5%, the measured solute diffusion coefficient is as low as 1.5 x 10{sup -14} m{sup 2}/s for tuff gravel. Currently used diffusion models relating diffusion coefficients to total volumetric water content inadequately describe unsaturated diffusion behavior in porous gravel at very low water contents.

Hu, Qinhong; Kneafsey, Timothy J.; Roberts, Jeffery J.; Tomutsa, Liviu; Wang, Joseph, S.Y.

2003-11-12T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

A Physically Based Approach for Modeling Multiphase Fracture-Matrix Interaction in Fractured Porous Media  

E-Print Network (OSTI)

modeling fluid and heat flow in fractured porous media, Soc.flow through unsaturated fractured porous media, Proceedings of the Second International Symposium on Dynamics of Fluids

Wu, Yu-Shu; Pan, Lehua; Pruess, Karsten

2004-01-01T23:59:59.000Z

242

A Physically Based Approach for Modeling Multiphase Fracture-Matrix Interaction in Fractured Porous Media  

E-Print Network (OSTI)

in modeling multiphase flow in porous and fractured media,multiphase tracer transport in heterogeneous fractured porousof multiphase flow through fractured or porous media.

Wu, Yu-Shu; Pan, Lehua; Pruess, Karsten

2004-01-01T23:59:59.000Z

243

High-throughput Characterization of Porous Materials Using Graphics Processing Units  

E-Print Network (OSTI)

A.E. ; Purcell, T. Computer Graphics Forum 2007, 26(1), 80-of Porous Materials Using Graphics Processing Units Jihanof Porous Materials Using Graphics Processing Units Jihan

Kim, Jihan

2013-01-01T23:59:59.000Z

244

Blasting, graphical interfaces and Unix  

SciTech Connect

A discrete element computer program, DMC (Distinct Motion Code) was developed to simulate blast-induced rock motion. To simplify the complex task of entering material and explosive design parameters as well as bench configuration, a full-featured graphical interface has been developed. DMC is currently executed on both Sun SPARCstation 2 and Sun SPARCstation 10 platforms and routinely used to model bench and crater blasting problems. This paper will document the design and development of the full-featured interface to DMC. The development of the interface will be tracked through the various stages, highlighting the adjustments made to allow the necessary parameters to be entered in terms and units that field blasters understand. The paper also discusses a novel way of entering non-integer numbers and the techniques necessary to display blasting parameters in an understandable visual manner. A video presentation will demonstrate the graphics interface and explains its use.

Knudsen, S. [RE/SPEC, Inc., Albuquerque, NM (United States); Preece, D.S. [Sandia National Labs., Albuquerque, NM (United States)

1993-11-01T23:59:59.000Z

245

Interfacing to the Programmer's Apprentice  

E-Print Network (OSTI)

In this paper, we discuss the design of a user interface to the Knowledge Based Editor (KBE), a prototype implementation of the Programmer's Apprentice. Although internally quite sophisticated, the KBE hides most of its ...

Pitman, Kent

246

Biological Interfaces | Clean Energy | ORNL  

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

Biological Interfaces A scientist examines bacteria isolated from the rhizosphere of a poplar tree as part of research on plant-microbe interactions.Source: ORNL Flickr site ORNL...

247

A Reliable Natural Language Interface  

E-Print Network (OSTI)

As household appliances grow in complexity and sophistication, they become harder and harder to use, particularly because of their tiny display screens and limited keyboards. This paper describes a strategy for building natural language interfaces to appliances that circumvents these problems. Our approach leverages decades of research on planning and natural language interfaces to databases by reducing the appliance problem to the database problem; the reduction provably maintains desirable properties of the database interface. The paper goes on to describe the implementation and evaluation of the EXACT interface to appliances, which is based on this reduction. EXACT maps each English user request to an SQL query, which is transformed to create a PDDL goal, and uses the Blackbox planner [13] to map the planning problem to a sequence of appliance commands that satisfy the original request. Both theoretical arguments and experimental evaluation show that EXACT is highly reliable.

To Household Appliances; Alexander Yates

2003-01-01T23:59:59.000Z

248

Electrode With Porous Three-Dimensional Support  

DOE Patents (OSTI)

Electrode including a paste containing particles of electrochemically active material and a conductive support consisting of a three-dimensional porous material comprising strands delimiting contiguous pores communicating via passages, characterized in that the average width L in .mu.m of said passages is related to the average diameter .O slashed. in .mu.m of said particles by the following equation, in which W and Y are dimensionless coefficients: wherein W=0.16 Y=1.69 X=202.4 .mu.m and Z=80 .mu.m

Bernard, Patrick (Massy, FR); Dauchier, Jean-Michel (Martignas, FR); Simonneau, Olivier (Dourdan, FR)

1999-07-27T23:59:59.000Z

249

A rigid porous filter and filtration method  

DOE Patents (OSTI)

The present invention involves a porous rigid filter comprising a plurality of concentric filtration elements having internal flow passages and forming external flow passages there between. The present invention also involves a pressure vessel containing the filter for the removal of particulate from high pressure particulate containing gases, and further involves a method for using the filter to remove such particulate. The present filter has the advantage of requiring fewer filter elements due to the high surface area- to-volume ratio provided by the filter, requires a reduced pressure vessel size, and exhibits enhanced mechanical design properties, improved cleaning properties, configuration options, modularity and ease of fabrication.

Chiang, Ta-Kuan; Straub, Douglas, Straub L.; Dennis, Richard A.

1998-12-01T23:59:59.000Z

250

Lithium intercalation in porous carbon anodes  

DOE Green Energy (OSTI)

Carbon foams derived from the phase separation of polyacrylonitrile/solvent mixtures were investigated as lithium intercalation anodes for rechargeable lithium-ion batteries. The carbon foams have a bulk density of 0.35--0.5 g/cm{sup 3}, low surface area (< 50 m{sup 2}/g), and an average cell size of 5--10 {mu}m. Polyacrylonitrile-based carbon foams doped with phosphoric acid had capacity as high as 450 mAh/g. Carbon capacity increased with increasing phosphoric acid concentration in the doping solution. The doped porous carbon anodes exhibited good cyclability and excellent coulombic efficiency.

Tran, T.D.; Pekala, R.W. [Lawrence Livermore National Lab., CA (United States). Chemistry and Materials Science Dept.; Mayer, S.T. [Polystor Corp., Livermore, CA (United States)

1994-11-23T23:59:59.000Z

251

Production of porous coating on a prosthesis  

DOE Patents (OSTI)

Preselected surface areas of a prosthesis are covered by a blend of matching primary metallic particles and expendable particles. The particles are compressed and heated to assure that deformation and metallurgical bonding occurs between them and between the primary particles and the surface boundaries of the prosthesis. Porosity is achieved by removal of the expendable material. The result is a coating including discrete bonded particles separated by a network of interconnected voids presenting a homogeneous porous coating about the substrate. It has strength suitable for bone implant usage without intermediate adhesives, and adequate porosity to promote subsequent bone ingrowth.

Sump, Kenneth R. (Richland, WA)

1987-01-01T23:59:59.000Z

252

Mechanical Behavior Related to Interface Physics  

Science Conference Proceedings (OSTI)

Jul 31, 2011 ... Interface Bond Strength of HIP-Clad Depleted Uranium and 6061-Aluminum · Interface Role in the Shock Response of Cu/Nb Metallic ...

253

HVAC Sensors, Controls, and Human Feedback Interfaces  

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

HVAC Sensors, HVAC Sensors, Controls, and Human Controls, and Human Feedback Interfaces Feedback Interfaces April 26, 2010 Dr. Amr Gado Emerson Climate Technologies Heating And...

254

Are Patents on Interfaces Impeding Interoperability?  

E-Print Network (OSTI)

disclosure as to and enablement of interface inventions,disclosure of any innovation the interface embodies. 64 Council on the Patentability of Computer-Implemented Inventions,

Samuelson, Pamela

2008-01-01T23:59:59.000Z

255

A viscoelastic representation of wave attenuation in porous media  

Science Conference Proceedings (OSTI)

The theories developed by White and co-workers describe the complex moduli of a medium partially saturated with spherical gas pockets and those of stratified layers composed of two heterogeneous porous media. A generalization to gas patches of arbitrary ... Keywords: Mesoscopic loss, Porous media, Wave attenuation, Zener model

Stefano Picotti; José M. Carcione; J. Germán Rubino; Juan E. Santos; Fabio Cavallini

2010-01-01T23:59:59.000Z

256

Tritium labeling of organic compounds deposited on porous structures  

DOE Patents (OSTI)

An improved process for labeling organic compounds with tritium is carried out by depositing the selected compound on the extensive surface of a porous structure such as a membrane filter and exposing the membrane containing the compound to tritium gas activated by the microwave discharge technique. The labeled compound is then recovered from the porous structure.

Ehrenkaufer, Richard L. E. (Speonk, NY); Wolf, Alfred P. (Setauket, NY); Hembree, Wylie C. (Woodcliff Lake, NJ)

1979-01-01T23:59:59.000Z

257

Combustion fronts in porous media with two layers Steve Schecter  

E-Print Network (OSTI)

Combustion fronts in porous media with two layers layer 1 layer 2 Steve Schecter North Carolina Subject: Propagation of a combustion front through a porous medium with two parallel layers having different properties. · Each layer admits a traveling combustion wave. · The layers are coupled by heat

Schecter, Stephen

258

Nitrogen modification of highly porous carbon for improved supercapacitor performance  

E-Print Network (OSTI)

Nitrogen modification of highly porous carbon for improved supercapacitor performance Stephanie L for supercapacitor applications. Surface modification increases the amount of nitrogen by four times when compared elements in highly porous carbon used for electric double-layer supercapacitors.1 These elements modify

Cao, Guozhong

259

Estimating Liquid Fluxes in Thermally Perturbed Fractured Rock Using Measured Temperature Profiles  

DOE Green Energy (OSTI)

A new temperature-profile method was recently developed for analyzing perturbed flow conditions in superheated porous media. The method uses high-resolution temperature data to estimate the magnitude of the heat-driven liquid and gas fluxes that form as a result of boiling, condensation, and recirculation of pore water. In this paper, we evaluate the applicability of this new method to the more complex flow behavior in fractured formations with porous rock matrix. In such formations, with their intrinsic heterogeneity, the porous but low-permeable matrix provides most of the mass and heat storage capacity, and dominates conductive heat transfer, Fractures, on the other hand, offer highly effective conduits for gas and liquid flow, thereby generating significant convective heat transfer. After establishing the accuracy of the temperature-profile method for fractured porous formations, we apply the method in analyzing the perturbed flow conditions in a large-scale underground heater test conducted in unsaturated fractured porous tuff. The flux estimates for this test indicate a significant reflux of water near the heat source, on the order of a few hundred millimeter per year-much larger than the ambient percolation flux of only a few millimeter per year.

J.T. Birkholzer

2005-02-14T23:59:59.000Z

260

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents (OSTI)

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent tc the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, D.K.; Burrows, R.W.

1991-03-13T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents (OSTI)

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, D.K.; Burrows, R.W.

1993-04-13T23:59:59.000Z

262

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents (OSTI)

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, D.K.; Burrows, R.W.

1992-12-31T23:59:59.000Z

263

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents (OSTI)

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, David K. (Golden, CO); Burrows, Richard W. (Conifer, CO)

1993-01-01T23:59:59.000Z

264

Heat exchangers comprising at least one porous member positioned within a casing  

Science Conference Proceedings (OSTI)

A heat exchanger and associated methods for sublimating solid particles therein, for conveying fluids therethrough, or both. The heat exchanger includes a chamber, and a porous member having a porous wall having pores in communication with the chamber and an interior of the porous member. A first fluid is conveyed into the porous member while a second fluid is conveyed into the porous member through the porous wall. The second fluid may form a positive flow boundary layer along the porous wall to reduce or eliminate substantial contact between the first fluid and the interior of the porous wall. The combined first and second fluids are conveyed out of the porous member. Additionally, the first fluid and the second fluid may each be conveyed into the porous member at different temperatures and may exit the porous member at substantially the same temperature.

Turner, Terry D. (Idaho Falls, ID); Wilding, Bruce M (Idaho Falls, ID)

2011-11-22T23:59:59.000Z

265

Fluid Flow Within Fractured Porous Media  

Science Conference Proceedings (OSTI)

Fractures provide preferential flow paths to subterranean fluid flows. In reservoir scale modeling of geologic flows fractures must be approximated by fairly simple formulations. Often this is accomplished by assuming fractures are parallel plates subjected to an applied pressure gradient. This is known as the cubic law. An induced fracture in Berea sandstone has been digitized to perform numerical flow simulations. A commercially available computational fluid dynamics software package has been used to solve the flow through this model. Single phase flows have been compared to experimental works in the literature to evaluate the accuracy with which this model can be applied. Common methods of fracture geometry classification are also calculated and compared to experimentally obtained values. Flow through regions of the fracture where the upper and lower fracture walls meet (zero aperture) are shown to induce a strong channeling effect on the flow. This model is expanded to include a domain of surrounding porous media through which the flow can travel. The inclusion of a realistic permeability in this media shows that the regions of small and zero apertures contribute to the greatest pressure losses over the fracture length and flow through the porous media is most prevalent in these regions. The flow through the fracture is shown to be the largest contributor to the net flow through the media. From this work, a novel flow relationship is proposed for flow through fractured media.

Crandall, D.M.; Ahmadi, G. (Clarkson Univ., Potsdam, NY); Smith, D.H.; Bromhal, G.S.

2006-10-01T23:59:59.000Z

266

A note on the evaporation of a stagnant liquid  

SciTech Connect

The main objective of this report was the understanding of the effect of higher pressures on the velocity of the gas-liquid interface. Experimental evidence (Le Romancer et al.) suggests that high-pressure gas injection results under certain conditions in a decrease of the rate of the interface motion, a result that may be due to gas dissolution and diffusion in the liquid phase. To explore this possibility, it was considered in this paper a simple 1-D model of this process as illustrated schematically in a figure. A liquid A, originally occupying a semi-infinite medium, is subject to evaporation and diffusion in a flowing gas B, the composition of which at the top of the medium (at z = 0) remains constant. Due to the possible high pressure in the gas, component B may solubilize and counter-diffuse in the liquid phase.

Tsimpanogiannis, Ioannis N.; Yortsos, Yanis C.; Stubos, A.K.

2000-03-06T23:59:59.000Z

267

Glossary Term - Liquid Nitrogen  

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

Lepton Previous Term (Lepton) Glossary Main Index Next Term (Mercury) Mercury Liquid Nitrogen Liquid nitrogen boils in a frying pan on a desk. The liquid state of the element...

268

Radiological Issues for the Thin Liquid Walls of ARIES-IFE Study  

SciTech Connect

Heavy ion beam driven inertial fusion energy (IFE) power plants employ liquid wall materials to protect the structure against the energetic x-rays, ions, and debris emitted from the target following each shot. The objective of this assessment is to identify the radiological issues of the candidate liquid wall materials (Pb, LiPb, Sn, and Flibe) using the ARIES-IFE radiation chamber environment. The issues to be addressed include the radioactivity level and liquid waste minimization for waste management. Specifically, the liquids are evaluated with regard to the Class C limitation for waste disposal, a top-level requirement for all ARIES power plant designs. Two extreme cases were analyzed; the worst case is separation of the liquid wall material (highest radiation exposure) and the breeder (lowest radiation exposure), and the best case is the mixing of the two liquid streams. Both tangential and porous wall injection schemes were examined. Pb and LiPb are more radioactive than Sn and Flibe. For the liquid breeder system, the porous wall injection scheme with mixed liquid flows results in the lowest waste disposal rating and smallest waste stream achieved in our study.

El-Guebaly, L. [University of Wisconsin-Madison (United States); Wilson, P. [University of Wisconsin-Madison (United States); Henderson, D. [University of Wisconsin-Madison (United States); Waganer, L. [Boeing Company (United States); Raffray, R. [University of California-San Diego (United States)

2003-09-15T23:59:59.000Z

269

X-ray Microtomography Determination of Air?Water Interfacial Area?Water Saturation Relationships in Sandy Porous Media  

Science Conference Proceedings (OSTI)

In this work, total smooth air-water interfacial areas were measured for a series of nine natural and model sandy porous media as a function of water saturation using synchrotron X-ray microtomography. Interfacial areas decreased linearly with water saturation, while the estimated maximum interfacial area compared favorably to the media geometric surface areas. Importantly, relative interfacial area (i.e., normalized by geometric surface area) versus water saturation plots for all media collapsed into a single linear cluster (r{sup 2} = 0.93), suggesting that geometric surface area is an important, and perhaps sufficient, descriptor of sandy media that governs total smooth interfacial area?water saturation relationships. Measured relationships were used to develop an empirical model for estimating interfacial area-water saturation relationships for sandy porous media. Model-based interfacial area estimates for independent media were generally slightly higher than interfacial areas measured using aqueous-phase interfacial tracer methods, which may indicate that microtomography captures regions of the air-water interface that are not accessible to aqueous-phase interfacial tracers. The empirical model presented here requires only average particle diameter and porosity as input parameters and can be used to readily estimate air-water interfacial area?water saturation relationships for sandy porous media.

Costanza-Robinson, Molly S.; Harrold, Katherine H.; Lieb-Lappen, Ross M. (Middlebury)

2008-08-06T23:59:59.000Z

270

Breathing liquid oxygen  

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

question is interesting though because it would be desirable to breath liquid instead of gas under certain conditions. Special liquids are being designed to carry dissolved...

271

Liquid Nitrogen Ice Cream  

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

Liquid Nitrogen Ice Cream If you have access to liquid nitrogen and the proper safety equipment and training, try this in place of your normal cryogenics demonstration Download...

272

Multi-robot control interface  

DOE Patents (OSTI)

Methods and systems for controlling a plurality of robots through a single user interface include at least one robot display window for each of the plurality of robots with the at least one robot display window illustrating one or more conditions of a respective one of the plurality of robots. The user interface further includes at least one robot control window for each of the plurality of robots with the at least one robot control window configured to receive one or more commands for sending to the respective one of the plurality of robots. The user interface further includes a multi-robot common window comprised of information received from each of the plurality of robots.

Bruemmer, David J. (Idaho Falls, ID); Walton, Miles C. (Idaho Falls, ID)

2011-12-06T23:59:59.000Z

273

PinBus Interface Design  

SciTech Connect

On behalf of the U.S. Department of Energy, PNNL has explored and expanded upon a simple control interface that might have merit for the inexpensive communication of smart grid operational objectives (demand response, for example) to small electric end-use devices and appliances. The approach relies on bi-directional communication via the electrical voltage states of from one to eight shared interconnection pins. The name PinBus has been suggested and adopted for the proposed interface protocol. The protocol is defined through the presentation of state diagrams and the pins’ functional definitions. Both simulations and laboratory demonstrations are being conducted to demonstrate the elegance and power of the suggested approach. PinBus supports a very high degree of interoperability across its interfaces, allowing innumerable pairings of devices and communication protocols and supporting the practice of practically any smart grid use case.

Hammerstrom, Donald J.; Adgerson, Jewel D.; Sastry, Chellury; Pratt, Richard M.; Pratt, Robert G.

2009-12-30T23:59:59.000Z

274

Frostbite Theater - Liquid Oxygen vs. Liquid Nitrogen - Liquid Oxygen and  

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

Cells vs. Liquid Nitrogen! Cells vs. Liquid Nitrogen! Previous Video (Cells vs. Liquid Nitrogen!) Frostbite Theater Main Index Next Video (Paramagnetism) Paramagnetism Liquid Oxygen and Fire! What happens when nitrogen and oxygen are exposed to fire? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is a test tube of liquid nitrogen! Steve: And this is a test tube of liquid oxygen! Joanna: Let's see what happens when nitrogen and oxygen are exposed to fire. Steve: Fire?! Joanna: Yeah! Steve: Really?! Joanna: Why not! Steve: Okay! Joanna: As nitrogen boils, it changes into nitrogen gas. Because it's so cold, it's denser than the air in the room. The test tube fills up with

275

Level set simulation of coupled advection-diffusion and pore structure evolution due to mineral precipitation in porous media  

SciTech Connect

The nonlinear coupling of fluid flow, reactive chemical transport and pore structure changes due to mineral precipitation (or dissolution) in porous media play a key role in a wide variety of processes of scientific interest and practical importance. Significant examples include the evolution of fracture apertures in the subsurface, acid fracturing stimulation for enhanced oil recovery and immobilizations of radionuclides and heavy metals in contaminated groundwater. We have developed a pore-scale simulation technique for modeling coupled reactive flow and structure evolution in porous media and fracture apertures. Advection, diffusion, and mineral precipitation resulting in changes in pore geometries are treated simultaneously by solving fully coupled fluid momentum and reactive solute transport equations. In this model, the reaction-induced evolution of solid grain surfaces is captured using a level set method. A sub-grid representation of the interface, based on the level set approach, is used instead of pixel representations of the interface often used in cellular-automata and most lattice-Boltzmann methods. The model is validated against analytical solutions for simplified geometries. Precipitation processes were simulated under various flow conditions and reaction rates, and the resulting pore geometry changes are discussed. Quantitative relationships between permeability and porosity under various flow conditions and reaction rates are reported.

Xiaoyi Li; Hai Huang; Paul Meakin

2008-09-01T23:59:59.000Z

276

Argonne CNM: Nanobio Interfaces Capabilities  

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

Nanobio Interfaces Capabilities Nanobio Interfaces Capabilities Synthesis Synthesis of metal oxide, semiconducting, metallic, and magnetic nanoparticles Self-assembly of monodisperse nanoparticles into two- and three-dimensional crystals and binary superlattices Bioconjugation and biochemical techniques with a focus on the synthetic biology and recombinant DNA/protein techniques Peptide synthesis (CSBio CS136XT) Functionalization of nanocrystalline surfaces with biomolecules, such as DNA, peptides, proteins and antibodies, using biochemical, electrochemical, and photochemical techniques Equipment Centrifuges (Beckman Coulter Optima L-100 XP Ultracentrifuge and Avanti J-E Centrifuge) Biological safety cabinets [Labconco Purifier Delta Series (Class II, B2)] Glovebox (MBraun LabMaster 130)

277

Light-Matter Quantum Interface  

E-Print Network (OSTI)

We propose a quantum interface which applies multiple passes of a pulse of light through an atomic sample with phase/polarization rotations in between the passes. Our proposal does not require nonclassical light input or measurements on the system, and it predicts rapidly growing unconditional entanglement of light and atoms from just coherent inputs. The proposed interface makes it possible to achieve a number of tasks within quantum information processing including teleportation between light and atoms, quantum memory for light and squeezing of atomic and light variables.

K. Hammerer; K. Molmer; E. S. Polzik; J. I. Cirac

2003-12-18T23:59:59.000Z

278

User interfaces to expert systems  

Science Conference Proceedings (OSTI)

Expert Systems are becoming increasingly popular in environments where the user is not well versed in computers or the subject domain. They offer expert advice and can also explain their lines of reasoning. As these systems are applied to highly technical areas, they become complex and large. Therefore, User Systems Interfaces (USIs) become critical. This paper discusses recent technologies that can be applied to improved user communication. In particular, bar menus/graphics, mouse interfaces, touch screens, and voice links will be highlighted. Their applications in the context of SOFTMAN (The Software Manager Apprentice) a knowledge-based system are discussed. 18 refs., 2 figs.

Agarwal, A.; Emrich, M.L.

1988-10-01T23:59:59.000Z

279

Matched interface and boundary (MIB) method for elliptic problems with sharp-edged interfaces  

Science Conference Proceedings (OSTI)

Elliptic problems with sharp-edged interfaces, thin-layered interfaces and interfaces that intersect with geometric boundary, are notoriously challenging to existing numerical methods, particularly when the solution is highly oscillatory. This work generalizes ... Keywords: Elliptic equations, Ghost fluid method, Immersed boundary method, Immersed interface method, Sharp-edged interfaces

Sining Yu; Yongcheng Zhou; G. W. Wei

2007-06-01T23:59:59.000Z

280

Synthesis and Characterization of Porous Metal Phosphonates  

E-Print Network (OSTI)

This dissertation focuses on the challenge of developing porous metal arylphosphonates with both high crystallinity and functional porosity by using different synthetic approaches. Metal phosphonates are an extensive class of materials based upon extended inorganic-organic architectures such as chains, layers and three-dimensional networks. Metal phosphonates generally favor extended inorganic architectures leading to pillared materials with no porosity. We found that the use of template molecules, type of ligand and choice of metal ions could be used to deviate from the pillared structure. Many of these structures had interesting properties that were explored. The results can be divided into three areas: We developed non-pillared monovalent metal phosphonates by investigating both the role of water and template molecules in the solvothermal synthesis. The role of water in solvothermal reactions was found to have a profound influence on the structure of monovalent metal phosphonates and the structures could be tailored from zero/one-dimensional to two-dimensional. Non-pillared structures could be synthesized by using template molecules. For a zinc phosphonate, we converted a layered structure into a three-dimensional framework by using small template molecules in the solvothermal reaction. The compound exhibited reversible dehydration behavior. The change in the framework structure and guest positions was monitored during this process. Two different ligands were used in the development of porous aluminum phosphonates. One series exhibited reversible dehydration behavior, which had a dramatic influence on permanent porosity of the material. The stability of the dehydrated phase is a result of the geometry of the aluminum atom, which in some cases has coordinatively unsaturated metal sites. The second series was developed with ion exchange applications in mind therefore the pore environment was tailored to favor ion exchange processes. The most important aspect is that these compounds exhibit high selectivity for Th^(4+) ions. In total 28 new compounds were prepared, and their utility and structures clarified.

Kinnibrugh, Tiffany Lewis

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Pore-scale simulations of drainage of heterogeneous and anisotropic porous media  

Science Conference Proceedings (OSTI)

A numerical model based on smoothed particle hydrodynamics (SPH) was used to simulate pore-scale liquid and gas flow in synthetic two-dimensional porous media consisting of non-overlapping grains. The model was used to study effects of pore scale heterogeneity and anisotropy on unsaturated flow and the saturation-pressure relationship. Pore scale anisotropy was created by using co-oriented non overlapping elliptical grains, and heterogeneity was created by inserting a micro-fracture in the middle of the porous domain consisting of non-overlapping circular grains. The effect of wetting fluid properties on drainage was also investigated. Capillary-pressure saturation curves resulting from fluid drainage through boundaries parallel and perpendicular the fracture alignment were qualitatively similar to those observed in gap-graded sediments with bimodal grain-size and pore-size distributions. Those derived from drainage on a boundary oriented perpendicular to particle and fracture alignment were qualitatively similar to those for mono-modal pore-size distributions. It is shown that pore-scale heterogeneity and anisotropy can gave rise to capillary pressure-saturation relationships and entry (bubbling) pressures that depend on flow direction suggesting that these properties should be described by tensor rather than scalar quantities.

Tartakovsky, Alexandre M.; Ward, Anderson L.; Meakin, Paul

2007-10-01T23:59:59.000Z

282

Mixing-Demixing Phase Diagram for Simple Liquids in Non-Uniform Electric Fields  

E-Print Network (OSTI)

We deduce the mixing-demixing phase diagram for binary liquid mixtures in an electric field for various electrode geometries and arbitrary constitutive relation for the dielectric constant. By focusing on the behavior of the liquid-liquid interface, we produce simple analytic expressions for the dependence of the interface location on experimental parameters. We also show that the phase diagram contains regions where liquid separation cannot occur under any applied field. The analytic expression for the boundary "electrostatic binodal" line reveals that the regions' size and shape depend strongly on the dielectric relation between the liquids. Moreover, we predict the existence of an "electrostatic spinodal" line that identifies conditions where the liquids are in a metastable state. We finally construct the phase diagram for closed systems by mapping solutions onto those of an open system via an effective liquid composition. For closed systems at a fixed temperature and mixture composition, liquid separation occurs in a finite "window" of surface potential (or charge density). Larger potentials or charge densities counterintuitively destroy the interface, leading to liquid mixing. These results give valuable guides for experiments by providing easily testable predictions for how liquids behave in non-uniform electric fields.

Jennifer Galanis; Yoav Tsori

2013-07-17T23:59:59.000Z

283

Fabrication of a Miniaturized Room Temperature Ionic Liquid Gas Sensor for Human Health and  

E-Print Network (OSTI)

Fabrication of a Miniaturized Room Temperature Ionic Liquid Gas Sensor for Human Health and Safety temperature ionic liquid (RTIL) gas sensors utilizing electrochemical instrumentation demonstrate promising that enables miniaturized, rapid response, gas sensors to be realized using RTIL interfaces on a permeable

Mason, Andrew

284

Nonlinear dynamics of capacitive charging and desalination by porous electrodes  

E-Print Network (OSTI)

The rapid and efficient exchange of ions between porous electrodes and aqueous solutions is important in many applications, such as electrical energy storage by supercapacitors, water desalination and purification by ...

Bazant, Martin Z.

285

Simulation of filtration for suspension transport in porous media  

E-Print Network (OSTI)

This thesis describes the development and application of a novel method for analyzing the filtration of particles transported through a granular porous medium. The proposed analysis considers the deposition of particles ...

Kim, Yun Sung, 1974-

2005-01-01T23:59:59.000Z

286

Comparison of porous and nonporous materials for methane storage  

SciTech Connect

Sublimed, low-density p-tert-buytlcalix(4)arene absorbs methane more readily at room temperature and 1 atm pressure than do either single wall carbon nanotubes (SWNT) or a comparaitive porous metal-organic framework (MOF-1).

Thallapally, Praveen K.; Kirby, Karen A.; Atwood, Jerry L.

2007-05-10T23:59:59.000Z

287

Non-equilibrium effects and multiphase flow in porous media.  

E-Print Network (OSTI)

??We encounter flow in porous media, knowingly or otherwise, on a daily basis; percolation of precipitation into top soil, ground-water supplies obtained from aquifers (ground-water… (more)

Aryana, Saman Afqahi.

2012-01-01T23:59:59.000Z

288

Modeling of Porous Electrodes in Molten-Salt Systems  

E-Print Network (OSTI)

of Porous Electrodes in Molten-Salt Systems^ John Newmanon High-Temperature Molten Salt B a t - teries, Argonneby the modeling of molten-salt cells, including some

Newman, John

1986-01-01T23:59:59.000Z

289

Gasification and combustion modeling for porous char particles  

E-Print Network (OSTI)

Gasification and combustion of porous char particles occurs in many industrial applications. Reactor-scale outputs of importance depend critically on processes that occur at the particle-scale. Because char particles often ...

Singer, Simcha Lev

2012-01-01T23:59:59.000Z

290

An overview of instability and fingering during immiscible fluid flow in porous and fractured media  

SciTech Connect

Wetting front instability is an important phenomenon affecting fluid flow and contaminant transport in unsaturated soils and rocks. It causes the development of fingers which travel faster than would a uniform front and thus bypass much of the medium. Water saturation and solute concentration in such fingers tend to be higher than in the surrounding medium. During infiltration, fingering may cause unexpectedly rapid arrival of water and solute at the water-table. This notwithstanding, most models of subsurface flow and transport ignore instability and fingering. In this report, we survey the literature to assess the extent to which this may or may not be justified. Our overview covers experiments, theoretical studies, and computer simulations of instability and fingering during immiscible two-phase flow and transport, with emphasis on infiltration into soils and fractured rocks. Our description of instability in an ideal fracture (Hele-Shaw cell) includes an extension of existing theory to fractures and interfaces having arbitrary orientations in space. Our discussion of instability in porous media includes a slight but important correction of existing theory for the case of an inclined interface. We conclude by outlining some potential directions for future research. Among these, we single out the effect of soil and rock heterogeneities on instability and preferential flow as meriting special attention in the context of nuclear waste storage in unsaturated media.

Chen, G.; Neuman, S.P. [Univ. of Arizona, Tucson, AZ (United States). Dept. of Hydrology and Water Resources; Taniguchi, M. [Nara Univ. of Education (Japan). Dept. of Earth Sciences

1995-04-01T23:59:59.000Z

291

Gas phase fractionation method using porous ceramic membrane  

DOE Patents (OSTI)

Flaw-free porous ceramic membranes fabricated from metal sols and coated onto a porous support are advantageously used in gas phase fractionation methods. Mean pore diameters of less than 40 .ANG., preferably 5-20 .ANG. and most preferably about 15 .ANG., are permeable at lower pressures than existing membranes. Condensation of gases in small pores and non-Knudsen membrane transport mechanisms are employed to facilitate and increase membrane permeability and permselectivity.

Peterson, Reid A. (Madison, WI); Hill, Jr., Charles G. (Madison, WI); Anderson, Marc A. (Madison, WI)

1996-01-01T23:59:59.000Z

292

Porous solid ion exchange wafer for immobilizing biomolecules  

DOE Patents (OSTI)

A porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer. Also disclosed is a porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer containing a biomolecule with a tag. A separate bioreactor is also disclosed incorporating the wafer described above.

Arora, Michelle B. (Woodridge, IL); Hestekin, Jamie A. (Morton Grove, IL); Lin, YuPo J. (Naperville, IL); St. Martin, Edward J. (Libertyville, IL); Snyder, Seth W. (Lincolnwood, IL)

2007-12-11T23:59:59.000Z

293

Interface Control Document for the Interface between the Central Solenoid Insert Coil and the Test Facility  

SciTech Connect

This document provides the interface definition and interface control between the Central Solenoid Insert Coil and the Central Solenoid Model Coil Test Facility in Japan.

Smirnov, Alexandre [ORNL; Martovetsky, Nicolai N [ORNL; Nunoya, Yoshihiko [Japan Atomic Energy Agency (JAEA), Naka

2011-06-01T23:59:59.000Z

294

Liquid-permeable electrode. [Patent application  

SciTech Connect

This invention relates to electrodes for use in electrolytic cells and to a method for preparing the electrodes. It specifically relates to fluid-permeable electrodes suitable for use as anodes and cathodes in electrolytic hydrogen generation cells in which it is necessary to continuously remove the products of the electrochemical reaction. The electrode is prepared by mixing about 10 parts by weight of activated charcoal with from 6 to 10 parts by weight of a powdered thermosetting phenolic resin to form a mixture, compacting the mixture in a heated mold of the desired shape to melt the resin and form a green electrode and heating the green electrode to from about 550 to 750/sup 0/C in a nonoxidizing atmosphere for a period of time sufficient to pyrolyze the resin and volatilize from about 40 to 60 weight percent of the resin present in the green compact to form a porous, rigid, liquid-permeable structure.

Folser, G.R

1978-08-30T23:59:59.000Z

295

Directx 9 User Interfaces: Design and Implementation  

Science Conference Proceedings (OSTI)

This unique book presents a comprehensive solution for creating good interfaces using the latest version of DirectX, which involves building an interface library from the ground up.

Alan Thorn

2004-04-01T23:59:59.000Z

296

Multi-fidelity prototyping of user interfaces  

Science Conference Proceedings (OSTI)

Multi-fidelity prototyping combines within a single user interface prototype several elements whose representations are reproduced with different levels of fidelity with respect to the final user interface: no fidelity at all, low fidelity, medium fidelity, ...

Adrien Coyette; Suzanne Kieffer; Jean Vanderdonckt

2007-09-01T23:59:59.000Z

297

Liquid level detector  

DOE Patents (OSTI)

A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

Grasso, Albert P. (Vernon, CT)

1986-01-01T23:59:59.000Z

298

Liquid level detector  

DOE Patents (OSTI)

A liquid level detector for low pressure boilers. A boiler tank, from which vapor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

Grasso, A.P.

1984-02-21T23:59:59.000Z

299

Electric and Magnetic Walls on Dielectric Interfaces  

E-Print Network (OSTI)

Sufficient conditions of the existence of electric or magnetic walls on dielectric interfaces are given for a multizone uniform dielectric waveguiding system. If one of two adjacent dielectric zones supports a TEM field distribution while the other supports a TM (TE) field distribution, then the common dielectric interface behaves as an electric (magnetic) wall, that is, the electric (magnetic) field line is perpendicular to the interface while the magnetic (electric) field line is parallel to the interface.

Changbiao Wang

2010-07-20T23:59:59.000Z

300

Science and Technology of Interfaces - International Symposium ...  

Science Conference Proceedings (OSTI)

SCIENCE AND TECHNOLOGY. OF INTERFACES. International Symposium Honoring the. Contributions of Dr. Bhakta Rath. Proceedings of a symposium ...

Note: This page contains sample records for the topic "liquid porous interfaces" 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

5. Natural Gas Liquids Statistics  

U.S. Energy Information Administration (EIA)

5. Natural Gas Liquids Statistics Natural Gas Liquids Proved Reserves U.S. natural gas liquids proved reserves decreased 7 percent to 7,459 million ...

302

Liquid Hydrogen Absorber for MICE  

E-Print Network (OSTI)

REFERENCES Figure 5: Liquid hydrogen absorber and test6: Cooling time of liquid hydrogen absorber. Eight CernoxLIQUID HYDROGEN ABSORBER FOR MICE S. Ishimoto, S. Suzuki, M.

Ishimoto, S.

2010-01-01T23:59:59.000Z

303

User interface design with matrix algebra  

Science Conference Proceedings (OSTI)

It is usually very hard, both for designers and users, to reason reliably about user interfaces. This article shows that 'push button' and 'point and click' user interfaces are algebraic structures. Users effectively do algebra when they interact, and ... Keywords: Matrix algebra, feature interaction, usability analysis, user interface design

Harold Thimbleby

2004-06-01T23:59:59.000Z

304

Proxying location update for idle mode interfaces  

Science Conference Proceedings (OSTI)

In cellular networks it is the mobile node's responsibility to update the network about its location change, especially when this one enters idle mode. We developed a new framework [8] where the idle interface is powered-off to save energy and thus could ... Keywords: MIH services, idle/active mode, location-update, proxied interface, proxied multi-radio interface, proxy entity

Hicham Mahkoum; Abdelhakim S. Hafid; Behcet Sarikaya

2010-06-01T23:59:59.000Z

305

Taking stock of user interface history  

Science Conference Proceedings (OSTI)

The user interface is coming of age and papers adressing UI history have appeared in fair amounts in the last 25 years. Most of them address particular aspects such as an innovative interface paradigm or the contribution of a visionary or a research ... Keywords: HCI history, history of computing, history of technology, user interface history

Anker Helms Jørgensen

2008-10-01T23:59:59.000Z

306

A Concurrent General Purpose Operator Interface  

Science Conference Proceedings (OSTI)

Compact interactive control consoles are rephcing traditional control rooms as operator interfaces for physical processes. In the irust major application of concurrent programming outside the area of operating systems, this paper presents a design for ... Keywords: Computer graphics, Concurrent Pascal, concurrent programming, interactive system, man-machine interface, operator interface, process control

Neil B. Corrigan; J. Denbigh Starkey

1984-11-01T23:59:59.000Z

307

Poroelastic response of orthotropic fractured porous media  

SciTech Connect

An algorithm is presented for inverting either laboratory or field poroelastic data for all the drained constants of an anisotropic (specifically orthotropic) fractured poroelastic system. While fractures normally weaken the system by increasing the mechanical compliance, any liquids present in these fractures are expected to increase the stiffness somewhat, thus negating to some extent the mechanical weakening influence of the fractures themselves. The analysis presented quantifies these effects and shows that the key physical variable needed to account for the pore-fluid effects is a factor of (1 - B), where B is Skempton's second coe#14;fficient and satisfies 0 {<=} #20; B < 1. This scalar factor uniformly reduces the increase in compliance due to the presence of communicating fractures, thereby stiffening the fractured composite medium by a predictable amount. One further goal of the discussion is to determine how many of the poroelastic constants need to be known by other means in order to determine the rest from remote measurements, such as seismic wave propagation data in the field. Quantitative examples arising in the analysis show that, if the fracture aspect ratio a{sub f} ~ 0.1 and the pore fluid is liquid water, then for several cases considered Skempton's B ~ 0:9, so the stiffening effect of the pore-liquid reduces the change in compliance due to the fractures by a factor 1-B ~ 0.1, in these examples. The results do however depend on the actual moduli of the unfractured elastic material, as well as on the pore-liquid bulk modulus, so these quantitative predictions are just examples, and should not be treated as universal results. Attention is also given to two previously unremarked poroelastic identities, both being useful variants of Gassmann's equations for homogeneous -- but anisotropic -- poroelasticity. Relationships to Skempton's analysis of saturated soils are also noted. The paper concludes with a discussion of alternative methods of analyzing and quantifying fluid-substitution behavior in poroelastic systems, especially for those systems having heterogeneous constitution.

Berryman, J.G.

2010-12-01T23:59:59.000Z

308

Novel user interface technologies and conversational user interfaces for information appliances  

Science Conference Proceedings (OSTI)

The metaphor of a 'desktop' as a user interface was useful for the migration from mainframe applications to personal computers. But it must be re-evaluated when thinking about new concepts and implementations of user interfaces for modern working and ... Keywords: agents, delegation, mobile appliances, multimodality, peripheral perception, user interface, user-interface agent

Norbert Gerfelder; Ulrike Spierling; Wolfgang Müller

2000-04-01T23:59:59.000Z

309

Window Interfaces: A Taxonomy of Window Manager User Interfaces  

E-Print Network (OSTI)

This article presents a taxonomy for the user-visible parts of window managers. It is interesting that there are actually very few significant differences, and the differences can be classified in a taxonomy with fairly limited branching. This taxonomy should be useful in evaluating the similarities and differences of various window managers, and it will also serve as a guide for the issues that need to be addressed by designers of future window manager user interfaces. The advantages and disadvantages of the various options are also presented. Since many modern window managers allow the user interface to be customized to a large degree, it is important to study the choices available. A window manager is a software package that helps the user monitor and control different contexts by separating them physically onto different parts of one or more display screens. At its simplest, a window manager provides many separate terminals on the same screen, each with its own connection to a time-sharing computer. At its most advanced, a window manager supports many different activities, each of which uses many windows, and each window, in turn, can contain many different kinds of information including text, graphics, and even video. Window managers are sometimes implemented as part of a computer’s operating system and sometimes as a server that can be used if desired. They September 1988 0272-1;1618810900-0065s0100 198R ltEE 65

Brad A. Myers

1988-01-01T23:59:59.000Z

310

Surface rheology and interface stability.  

SciTech Connect

We have developed a mature laboratory at Sandia to measure interfacial rheology, using a combination of home-built, commercially available, and customized commercial tools. An Interfacial Shear Rheometer (KSV ISR-400) was modified and the software improved to increase sensitivity and reliability. Another shear rheometer, a TA Instruments AR-G2, was equipped with a du Nouey ring, bicone geometry, and a double wall ring. These interfacial attachments were compared to each other and to the ISR. The best results with the AR-G2 were obtained with the du Nouey ring. A Micro-Interfacial Rheometer (MIR) was developed in house to obtain the much higher sensitivity given by a smaller probe. However, it was found to be difficult to apply this technique for highly elastic surfaces. Interfaces also exhibit dilatational rheology when the interface changes area, such as occurs when bubbles grow or shrink. To measure this rheological response we developed a Surface Dilatational Rheometer (SDR), in which changes in surface tension with surface area are measured during the oscillation of the volume of a pendant drop or bubble. All instruments were tested with various surfactant solutions to determine the limitations of each. In addition, foaming capability and foam stability were tested and compared with the rheology data. It was found that there was no clear correlation of surface rheology with foaming/defoaming with different types of surfactants, but, within a family of surfactants, rheology could predict the foam stability. Diffusion of surfactants to the interface and the behavior of polyelectrolytes were two subjects studied with the new equipment. Finally, surface rheological terms were added to a finite element Navier-Stokes solver and preliminary testing of the code completed. Recommendations for improved implementation were given. When completed we plan to use the computations to better interpret the experimental data and account for the effects of the underlying bulk fluid.

Yaklin, Melissa A.; Cote, Raymond O.; Moffat, Harry K.; Grillet, Anne Mary; Walker, Lynn; Koehler, Timothy P.; Reichert, Matthew D. (Carnegie Mellon University, Pittsburgh, PA); Castaneda, Jaime N.; Mondy, Lisa Ann; Brooks, Carlton, F.

2010-11-01T23:59:59.000Z

311

Metawidgets in the multimodal interface  

SciTech Connect

We analyze two intertwined and fundamental issues concerning computer-to-human communication in the multimodal interfaces: the interplay between sound and graphics, and the role of object persistence. Our observations lead us to introduce metawidgets as abstract entities capable of manifesting themselves to users as image, as sound, or as various combinations and/or sequences of the two media. We show examples of metawidgets in action, and discuss mechanisms for choosing among alternative media for metawidget instantiation. Finally, we describe a couple of experimental microworlds we have implemented to test out some of our ideas. 17 refs., 7 figs.

Blattner, M.M. (Lawrence Livermore National Lab., CA (United States) Anderson (M.D.) Cancer Center, Houston, TX (United States)); Glinert, E.P.; Jorge, J.A.; Ormsby, G.R. (Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Computer Science)

1991-01-01T23:59:59.000Z

312

Vibrations of a Hollow Nanosphere with a Porous Thin Shell in Liquid  

E-Print Network (OSTI)

*,, The Open Laboratory of Bond-Selective Chemistry, Departmental of Chemical Physics, University of Science time, Rayleigh3 discussed the flexural vibrations of an open shell or bowl, which is different from

Wu, Chi

313

Numerical simulation of single-phase and multiphase non-Darcy flow in porous and fractured reservoirs  

E-Print Network (OSTI)

modeling fluid and heat flow in fractured porous media, Soc.flow of single-phase and multi-phase fluids in porous and fractured media.

Wu, Yu-Shu

2000-01-01T23:59:59.000Z

314

Non-isothermal flow in low permeable porous media: A comparison of Richards' and two-phase flow approaches  

E-Print Network (OSTI)

A model for multiphase ?ow and transport in porous mediaMultiphase ?ow ?elds in in-situ air sparging and its effect on remediation. Transp Porous

Wang, W.

2010-01-01T23:59:59.000Z

315

A unified numerical framework model for simulating flow, transport, and heat transfer in porous and fractured media  

E-Print Network (OSTI)

Flow, Transport, and Heat Transfer in Porous and Fracturedtransport, and heat transfer in porous and fracturedflow, chemical transport, and heat transfer in rock. These

Wu, Yu-Shu

2004-01-01T23:59:59.000Z

316

Discrete particle transport in porous media : discrete observations of physical mechanisms influencing particle behavior  

E-Print Network (OSTI)

An understanding of how discrete particles in the micron to submicron range behave in porous media is important to a number of environmental problems. Discrete particle behavior in the interior of a porous medium is complex ...

Yoon, Joon Sik, 1973-

2005-01-01T23:59:59.000Z

317

Study of gas flow dynamics in porous and granular media with laser-polarized ¹²?Xe NMR  

E-Print Network (OSTI)

This thesis presents Nuclear Magnetic Resonance (NMR) studies of gas flow dynamics in porous and granular media by using laser-polarized ¹²?Xe . Two different physical processes, the gas transport in porous rock cores and ...

Wang, Ruopeng, 1972-

2005-01-01T23:59:59.000Z

318

Phenomenological study of Au and Pt nanowires grown in porous alumina scaffolds  

E-Print Network (OSTI)

Porous anodic aluminum oxide, commonly known as AAO, has been widely used as a scaffold to synthesize nanowires and nanotubes. The porous alumina structure can be obtained from a simple electrochemical oxidation process, ...

Shin, Yong Cheol, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

319

Cracking in liquid petroleum gas Horton spheres  

Science Conference Proceedings (OSTI)

A gas processing plant on the western coast of India produces sweet gas after processing sour natural gas. Liquid petroleum gas (LPG) is recovered from the sweet gas. The LPG, containing a H{sub 2}S concentration of 10 ppm to 20 ppm, is stored in Horton spheres, each 17 m in diameter with a capacity of {minus}27 C to 55 C. Horton spheres for containing liquid petroleum gas (LPG) were fabricated on-site using prestressed plates of high-strength carbon steel (CS) SA 537 Class-1 with post-weld heat treatment. High-residual tensile stresses and hydrogen absorption from H{sub 2}S present in LPG could be the cause of cracking at weld and heat-affected zone interfaces at high hardness locations. Recommendations are given for inspection and use of lower-strength CS and improved welding procedures.

Trivedi, D.K. Gupta, S.C. [Oil and Natural Gas Corp., Surat (India). Hazari Gas Processing Complex

1997-07-01T23:59:59.000Z

320

High Co2 Emissions Through Porous Media- Transport Mechanisms And  

Open Energy Info (EERE)

Co2 Emissions Through Porous Media- Transport Mechanisms And Co2 Emissions Through Porous Media- Transport Mechanisms And Implications For Flux Measurement And Fractionation Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: High Co2 Emissions Through Porous Media- Transport Mechanisms And Implications For Flux Measurement And Fractionation Details Activities (1) Areas (1) Regions (0) Abstract: Diffuse emissions of CO2 are known to be large around some volcanoes and hydrothermal areas. Accumulation-chamber measurements of CO2 flux are increasingly used to estimate the total magmatic or metamorphic CO2 released from such areas. To assess the performance of accumulation chamber systems at fluxes one to three orders of magnitude higher than normally encountered in soil respiration studies, a test system was

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Surface and Interfacial Properties of Nonaqueous-Phase Liquid Mixtures Released to the Subsurface at the Hanford Site  

Science Conference Proceedings (OSTI)

Surface and interfacial tensions that arise at the interface between different phases are key parameters affecting Nonaqueous Phase Liquid (NAPL) movement and redistribution in the vadose zone after spill events. In this study, the impact of major additive components on surface and interfacial tensions for organic mixtures and wastewater was investigated. Organic mixture and wastewater compositions are based upon carbon tetrachloride (CT) mixtures released at the Hanford site, where CT was discharged simultaneously with dibutyl butyl phosphonate (DBBP), tributyl phosphate (TBP), dibutyl phosphate (DBP), and a machining lard oil (LO). A considerable amount of wastewater consisting primarily of nitrates and metal salts was also discharged. The tension values measured in this study revealed that the addition of these additive components caused a significant lowering of the interfacial tension with water or wastewater and the surface tension of the wastewater phase in equilibrium with the organic mixtures, compared to pure CT, but had minimal effect on the surface tension of the NAPL itself. These results lead to large differences in spreading coefficients for several mixtures, where the additives caused both a higher (more spreading) initial spreading coefficient and a lower (less spreading) equilibrium spreading coefficient. This indicates that if these mixtures migrate into uncontaminated areas, they will tend to spread quickly, but form a higher residual NAPL saturation after equilibrium, as compared to pure CT. Over time, CT likely volatilizes more rapidly than other components in the originally disposed mixtures and the lard oil and phosphates would become more concentrated in the remaining NAPL, resulting in a lower interfacial tension for the mixture. Spreading coefficients are expected to increase and perhaps change the equilibrated organic mixtures from nonspreading to spreading in water-wetting porous media. These results show that the behavior of organic chemical mixtures should be accounted for in numerical flow and transport models.

Nellis, Scott; Yoon, Hongkyu; Werth, Charlie; Oostrom, Martinus; Valocchi, Albert J.

2009-05-01T23:59:59.000Z

322

Porous electrolyte retainer for molten carbonate fuel cell. [lithium aluminate  

DOE Patents (OSTI)

A porous tile for retaining molten electrolyte within a fuel cell is prepared by sintering particles of lithium aluminate into a stable structure. The tile is assembled between two porous metal plates which serve as electrodes with fuels gases such as H/sub 2/ and CO opposite to oxidant gases such as O/sub 2/ and CO/sub 2/. The tile is prepared with a porosity of 55 to 65% and a pore size distribution selected to permit release of sufficient molten electrolyte to wet but not to flood the adjacent electrodes.

Singh, R.N.; Dusek, J.T.

1979-12-27T23:59:59.000Z

323

Convective instabilities in superposed porous and fluid layers in the presence of Coriolis forces  

Science Conference Proceedings (OSTI)

Thermal convection in a two-layer system consisting of a horizontal fluid layer overlying a layer of porous medium saturated with the same fluid, with uniform heating from below in the presence of Coriolis forces is investigated. The flow in porous medium ... Keywords: Brinkman model, Coriolis forces, superposed porous/fluid layers, thermal convection

Abdullah A. Abdullah; Hanadi M. Banjar

2011-01-01T23:59:59.000Z

324

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents (OSTI)

An illumination source comprising a porous silicon having a source of electrons on the surface and/or interticies thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon.

Tam, Shiu-Wing (Downers Grove, IL)

1998-01-01T23:59:59.000Z

325

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents (OSTI)

An illumination source comprising a porous silicon having a source of electrons on the surface and/or interticies thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon.

Tam, Shiu-Wing (Downers Grove, IL)

1997-01-01T23:59:59.000Z

326

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents (OSTI)

Disclosed is an illumination source comprising a porous silicon having a source of electrons on the surface and/or interstices thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon. 1 fig.

Tam, S.W.

1997-02-25T23:59:59.000Z

327

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents (OSTI)

An illumination source is disclosed comprising a porous silicon having a source of electrons on the surface and/or interstices thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon. 1 fig.

Tam, S.W.

1998-06-16T23:59:59.000Z

328

Performance of cryogenically cooled, high-heat-load silicon crystal monochromators with porous media augmentation  

SciTech Connect

The performance of two Si crystal x-ray monochromators internally cooled with liquid nitrogen was tested on the F2-wiggler beamline at the Cornell High Energy Synchrotron Source (CHESS). Both crystals were (111)-oriented blocks of rectangular cross section having identical dimensions. Seven 6.4-mm-diameter coolant channels were drilled through the crystals along the beam direction. In one of the crystals, porous Cu mesh inserts were bonded into the channels to enhance the heat transfer. The channels of the second crystal were left as drilled. Symmetric, double-crystal rocking curves were recorded simultaneously for both the first and third order reflections at 8 and 24 keV. The power load on the cooled crystal was adjusted by varying the horizontal beam size using slits. The measured Si(333) rocking curve of the unenhanced crystal at 24 keV at low power was 1.9 arcsec FWHM. The theoretical width is 0.63 arcsec. The difference is due to residual fabrication and mounting strain. For a maximum incident power of 601 W and an average power density of about 10 W/MM{sup 2}, the rocking curve was 2.7 arcsec. The rocking curve for the enhanced crystal at low power was 2.4 arcsec. At a maximum incident power of 1803 W and an average power density of about 19 W/mm{sup 2} the rocking curve width was 2.2 arcsec FWHM. The use of porous mesh augmentation is a simple, but very effective, means to improve the performance of cryogenically cooled Si monochromators exposed to high power x-ray beams.

Rogers, C.S.; Mills, D.M.; Assoufid, L.; Graber, T.

1996-01-01T23:59:59.000Z

329

Generating Remote Control Interfaces for Complex Appliances  

E-Print Network (OSTI)

The personal universal controller (PUC) is an approach for improving the interfaces to complex appliances by introducing an intermediary graphical or speech interface. A PUC engages in two-way communication with everyday appliances, first downloading a specification of the appliance's functions, and then automatically creating an interface for controlling that appliance. The specification of each appliance includes a high-level description of every function, a hierarchical grouping of those functions, and dependency information, which relates the availability of each function to the appliance's state. Dependency information makes it easier for designers to create specifications and helps the automatic interface generators produce a higher quality result. We describe the architecture that supports the PUC, and the interface generators that use our specification language to build high-quality graphical and speech interfaces.

Jeffrey Nichols; Brad A. Myers; Michael Higgins; Joseph Hughes; Thomas K. Harris; Roni Rosenfeld; Mathilde Pignol

2002-01-01T23:59:59.000Z

330

New User Interface Capabilities for Control Systems  

Science Conference Proceedings (OSTI)

Latest technologies promise new control system User Interface (UI) features and greater interoperability of applications. New developments using Java and Eclipse aim to unify diverse control systems and make communication between applications seamless. Web based user interfaces can improve portability and remote access. Modern programming tools improve efficiency, support testing and facilitate shared code. This paper will discuss new developments aimed at improving control system interfaces and their development environment.

Kasemir, Kay [ORNL

2009-01-01T23:59:59.000Z

331

High Performance Thermal Interface Technology Overview  

E-Print Network (OSTI)

An overview on recent developments in thermal interfaces is given with a focus on a novel thermal interface technology that allows the formation of 2-3 times thinner bondlines with strongly improved thermal properties at lower assembly pressures. This is achieved using nested hierarchical surface channels to control the particle stacking with highly particle-filled materials. Reliability testing with thermal cycling has also demonstrated a decrease in thermal resistance after extended times with longer overall lifetime compared to a flat interface.

R. Linderman; T. Brunschwiler; B. Smith; B. Michel

2008-01-07T23:59:59.000Z

332

Liquid level detector  

DOE Patents (OSTI)

A liquid level detector for conductive liquids for vertical installation in a tank, the detector having a probe positioned within a sheath and insulated therefrom by a seal so that the tip of the probe extends proximate to but not below the lower end of the sheath, the lower end terminating in a rim that is provided with notches, said lower end being tapered, the taper and notches preventing debris collection and bubble formation, said lower end when contacting liquid as it rises will form an airtight cavity defined by the liquid, the interior sheath wall, and the seal, the compression of air in the cavity preventing liquid from further entry into the sheath and contact with the seal. As a result, the liquid cannot deposit a film to form an electrical bridge across the seal.

Tshishiku, Eugene M. (Augusta, GA)

2011-08-09T23:59:59.000Z

333

Sandia National Laboratories Fluid Interface Position Optical ...  

The fiber optic technology of this Sandia ... absorbed light in the system and calculate the position of the interface between opaque and clear ...

334

Designing Success - Industrial Process Interface Development.  

E-Print Network (OSTI)

??This master thesis describes and treats the conflict between usability and safety in designing industrial interfaces. With literature studies and case studies as a base… (more)

Persson, Markus

2004-01-01T23:59:59.000Z

335

Fourier Grid Hamiltonian 1D Program Interface  

Science Conference Proceedings (OSTI)

Fourier Grid Hamiltonian 1D Program Interface Description. ... The number of points used in the grid is also set in the Range Frame. ...

2012-10-18T23:59:59.000Z

336

Are Patents on Interfaces Impeding Interoperability?  

E-Print Network (OSTI)

Leveraging, and Essential Facilities: InteroperabilityU.S. and EU caselaw on essential facilities and refusals tos interfaces are an “essential facility” which Microsoft, as

Samuelson, Pamela

2008-01-01T23:59:59.000Z

337

User interfaces in space science instrumentation .  

E-Print Network (OSTI)

??This thesis examines user interaction with instrumentation in the specific context of space science. It gathers together existing practice in machine interfaces with a look… (more)

McCalden, A.J.

2006-01-01T23:59:59.000Z

338

RENEWABLE LIQUID GETTERING PUMP  

DOE Patents (OSTI)

A method and structure were developed for pumping gases by simple absorption into a liquid gettering material. The invention comprises means ror continuously pumping a liquid getterrng material from a reservoir to the top of a generally vertical surface disposed in a vacuum pumping chamber to receive gaseous and other particles in the liquid gettering material which continuously flows downward over the vertical suiface. Means are provided for continuous removal, degassing, and return of a portion of the liquid gettering material from the reservoir connected with collectrng means at the base of the generally vertical plate. (AEC)

Batzer, T.H.

1962-08-21T23:59:59.000Z

339

Liquid level detection  

Science Conference Proceedings (OSTI)

This paper discusses a method. It is for detecting presence of a liquid level at a first predetermined point along the depth of a borehole.

Fryer, C.D.; Stie, K.E.; Wedel, M.W.; Stamper, K.R.

1990-11-27T23:59:59.000Z

340

Gas scrubbing liquids  

DOE Patents (OSTI)

Fully chlorinated and/or fluorinated hydrocarbons are used as gas scrubbing liquids for preventing noxious gas emissions to the atmosphere.

Lackey, Walter J. (Oak Ridge, TN); Lowrie, Robert S. (Oak Ridge, TN); Sease, John D. (Knoxville, TN)

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Domain decomposition strategies for nonlinear flow problems in porous media  

Science Conference Proceedings (OSTI)

Domain decomposition (DD) methods, such as the additive Schwarz method, are almost exclusively applied to linearized equations. In the context of nonlinear problems, these linear systems appear as part of a Newton iteration. However, applying DD methods ... Keywords: ASPIN, Domain decomposition, Nonlinear multiphase flow, Nonlinear preconditioning, Nonlinear solvers, Porous media

Jan Ole Skogestad; Eirik Keilegavlen; Jan M. Nordbotten

2013-02-01T23:59:59.000Z

342

High-strength porous carbon and its multifunctional applications  

SciTech Connect

High-strength porous carbon and a method of its manufacture are described for multifunctional applications, such as ballistic protection, structural components, ultracapacitor electrodes, gas storage, and radiation shielding. The carbon is produced from a polymer precursor via carbonization, and optionally by surface activation and post-treatment.

Wojtowicz, Marek A; Rubenstein, Eric P; Serio, Michael A; Cosgrove, Joseph E

2013-12-31T23:59:59.000Z

343

Boundary layer solutions for natural convection in porous media  

DOE Green Energy (OSTI)

An approximate solution is developed for natural convection in porous media resulting from localized heat sources. The method is applicable for moderate levels of convection. Results of the method compare well with those of other calculational methods and with experimental data. The solution for a spherical source can be used as an indirect method for the determination of permeability in some cases.

Hardee, H.C.

1976-05-01T23:59:59.000Z

344

Simulations of strongly phase-separated liquid-gas systems  

E-Print Network (OSTI)

Lattice Boltzmann simulations of liquid-gas systems are believed to be restricted to modest density ratios of less than 10. In this article we show that reducing the speed of sound and, just as importantly, the interfacial contributions to the pressure allows lattice Boltzmann simulations to achieve high density ratios of 1000 or more. We also present explicit expressions for the limits of the parameter region in which the method gives accurate results. There are two separate limiting phenomena. The first is the stability of the bulk liquid phase. This consideration is specific to lattice Boltzmann methods. The second is a general argument for the interface discretization that applies to any diffuse interface method.

A. J. Wagner; C. M. Pooley

2006-08-22T23:59:59.000Z

345

Towards a cultural user interface generation principles  

Science Conference Proceedings (OSTI)

As ubiquitous computing, and pervasive computing technology are being applied rapidly to the service industry, in the field of HCI, more complex and in-depth research are required at the moment. The efforts to make user experience more valuable using ... Keywords: CTT, Cultural dimensions model, Cultural markers, Cultural user interface, Culture centered design, MB-UID, User interface generation

Jung-Min Oh; Nammee Moon

2013-03-01T23:59:59.000Z

346

Gender Differences in Interface Type Task Analysis  

Science Conference Proceedings (OSTI)

The three pillars of usability are efficiency, effectiveness and satisfaction. Today's human-computer interface HCI, used in cellular phone, software, Internet, personal digital assistants and others should be designed to meet these three pillars. This ... Keywords: Gender, Icon, Interface, Menu, Perceived Ease of Use, Perceived Usefulness, Task Completion

Raafat George Saadé; Dennis Kira; Camille Alexandre Otrakji

2012-04-01T23:59:59.000Z

347

Standardization of user interfaces for lighting controls  

Science Conference Proceedings (OSTI)

Standardization of human-machine interfaces has proved beneficial in a number of technology areas. Lighting control is a home and office technology that is of central importance in energy efficiency and could potentially benefit from standardization, ... Keywords: CIE, Concepts, HVAC, IEANA, IEC, ISO, Indicators, LED, Lighting controls, NEMA, SAE, Standards, Symbols, User interfaces

Bruce Nordman; Jessica Granderson; Kelly Cunningham

2012-02-01T23:59:59.000Z

348

Stability of Java interfaces: a preliminary investigation  

Science Conference Proceedings (OSTI)

The attribute of stability is regarded by some as an important attribute of software. Some claims regarding software design quality imply that what are called interfaces in Java are stable. This paper introduces some new metrics for investigating ... Keywords: java interface, software metrics, stability

Jonathan Chow; Ewan Tempero

2011-05-01T23:59:59.000Z

349

Second international workshop on organic user interfaces  

Science Conference Proceedings (OSTI)

Advances in display, sensor and actuator technology are changing the field of TEI, and opening new research areas. While modern interfaces have been designed for traditional planar and static display devices, next-generation UI allow digital objects ... Keywords: flexible displays, organic user interfaces, tangibles

Audrey Girouard; Roel Vertegaal; Ivan Poupyrev

2011-01-01T23:59:59.000Z

350

Liquid-liquid interfacial nanoparticle assemblies  

DOE Patents (OSTI)

Self-assembly of nanoparticles at the interface between two fluids, and methods to control such self-assembly process, e.g., the surface density of particles assembling at the interface; to utilize the assembled nanoparticles and their ligands in fabrication of capsules, where the elastic properties of the capsules can be varied from soft to tough; to develop capsules with well-defined porosities for ultimate use as delivery systems; and to develop chemistries whereby multiple ligands or ligands with multiple functionalities can be attached to the nanoparticles to promote the interfacial segregation and assembly of the nanoparticles. Certain embodiments use cadmium selenide (CdSe) nanoparticles, since the photoluminescence of the particles provides a convenient means by which the spatial location and organization of the particles can be probed. However, the systems and methodologies presented here are general and can, with suitable modification of the chemistries, be adapted to any type of nanoparticle.

Emrick, Todd S. (South Deerfield, MA); Russell, Thomas P. (Amherst, MA); Dinsmore, Anthony (Amherst, MA); Skaff, Habib (Amherst, MA); Lin, Yao (Amherst, MA)

2008-12-30T23:59:59.000Z

351

Aging of SRC liquids  

Science Conference Proceedings (OSTI)

The viscosity of SRC?LL liquid increases when subjected to accelerated aging by bubbling oxygen in the presence of copper strip at 62°C. Precipitates are formed and can be separated from the aged liquid by Soxhlet extraction with pentane. A 30?70 blend of SRC?I with SRC?LL was subjected to oxygen aging in the absence of copper

T. Hara; L. Jones; K. C. Tewari; N. C. Li

1981-01-01T23:59:59.000Z

352

INEEL Liquid Effluent Inventory  

Science Conference Proceedings (OSTI)

The INEEL contractors and their associated facilities are required to identify all liquid effluent discharges that may impact the environment at the INEEL. This liquid effluent information is then placed in the Liquid Effluent Inventory (LEI) database, which is maintained by the INEEL prime contractor. The purpose of the LEI is to identify and maintain a current listing of all liquid effluent discharge points and to identify which discharges are subject to federal, state, or local permitting or reporting requirements and DOE order requirements. Initial characterization, which represents most of the INEEL liquid effluents, has been performed, and additional characterization may be required in the future to meet regulations. LEI information is made available to persons responsible for or concerned with INEEL compliance with liquid effluent permitting or reporting requirements, such as the National Pollutant Discharge Elimination System, Wastewater Land Application, Storm Water Pollution Prevention, Spill Prevention Control and Countermeasures, and Industrial Wastewater Pretreatment. The State of Idaho Environmental Oversight and Monitoring Program also needs the information for tracking liquid effluent discharges at the INEEL. The information provides a baseline from which future liquid discharges can be identified, characterized, and regulated, if appropriate. The review covered new and removed buildings/structures, buildings/structures which most likely had new, relocated, or removed LEI discharge points, and at least 10% of the remaining discharge points.

Major, C.A.

1997-06-01T23:59:59.000Z

353

Synthesis of ionic liquids  

DOE Patents (OSTI)

Ionic compounds which are liquids at room temperature are formed by the method of mixing a neutral organic ligand with the salt of a metal cation and its conjugate anion. The liquids are hydrophobic, conductive and stable and have uses as solvents and in electrochemical devices.

Dai, Sheng (Knoxville, TN); Luo, Huimin (Knoxville, TN)

2011-11-01T23:59:59.000Z

354

Radioactive Liquid Processing Guidelines  

Science Conference Proceedings (OSTI)

This report presents guidance for utility liquid radwaste processing program managers. The document is a summation of utility and vendor processing experience, and is intended for use as a tool to enhance liquid radwaste processing programs. Utilization of this information will result in optimized system performance, and a reduction in waste volumes and program costs.

2005-11-22T23:59:59.000Z

355

Liquid heat capacity lasers  

DOE Patents (OSTI)

The heat capacity laser concept is extended to systems in which the heat capacity lasing media is a liquid. The laser active liquid is circulated from a reservoir (where the bulk of the media and hence waste heat resides) through a channel so configured for both optical pumping of the media for gain and for light amplification from the resulting gain.

Comaskey, Brian J. (Walnut Creek, CA); Scheibner, Karl F. (Tracy, CA); Ault, Earl R. (Livermore, CA)

2007-05-01T23:59:59.000Z

356

Intelligent interface for design and simulation  

Science Conference Proceedings (OSTI)

We are developing a system composed of intelligent interfaces, expert systems, and databases that uses artificial intelligence techniques to simplify the use of large simulation codes and to help design complicated physical devices. The simulation codes are used in analyzing and designing weapons, and the devices are themselves parts of weapon systems. From a designer's point of view, the simulation process is the same no matter what is being simulated. In the course of developing two intelligent interfaces for the design of nuclear weapons, we have found that data-driven programming is a useful technique for implementing an open-ended user interface to assist the designer. We discuss the simulation process as it is done now and as it could be done with intelligent interfaces. We then discuss the use of data-driven programming in a database environment to support an interface for an arbitrary number of simulation codes. 3 figs.

Draisin, W.; Peter, E.

1986-01-01T23:59:59.000Z

357

Liquid Fuels Market Module  

U.S. Energy Information Administration (EIA) Indexed Site

Liquid Fuels Market Module Liquid Fuels Market Module This page inTenTionally lefT blank 145 U.S. Energy Information Administration | Assumptions to the Annual Energy Outlook 2013 Liquid Fuels Market Module The NEMS Liquid Fuels Market Module (LFMM) projects petroleum product prices and sources of supply for meeting petroleum product demand. The sources of supply include crude oil (both domestic and imported), petroleum product imports, unfinished oil imports, other refinery inputs (including alcohols, ethers, esters, corn, biomass, and coal), natural gas plant liquids production, and refinery processing gain. In addition, the LFMM projects capacity expansion and fuel consumption at domestic refineries. The LFMM contains a linear programming (LP) representation of U.S. petroleum refining

358

Reading Comprehension - Liquid Nitrogen  

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

Liquid Nitrogen Liquid Nitrogen Nitrogen is the most common substance in Earth's _________ crust oceans atmosphere trees . In the Earth's atmosphere, nitrogen is a gas. The particles of a gas move very quickly. They run around and bounce into everyone and everything. The hotter a gas is, the _________ slower faster hotter colder the particles move. When a gas is _________ cooled warmed heated compressed , its particles slow down. If a gas is cooled enough, it can change from a gas to a liquid. For nitrogen, this happens at a very _________ strange warm low high temperature. If you want to change nitrogen from a gas to a liquid, you have to bring its temperature down to 77 Kelvin. That's 321 degrees below zero _________ Kelvin Celsius Centigrade Fahrenheit ! Liquid nitrogen looks like water, but it acts very differently. It

359

The Orientation Distributions of Lines, Surfaces, and Interfaces Around Three-Phase Boundaries in Solid Oxide Fuel Cell Cathodes  

Science Conference Proceedings (OSTI)

Three-dimensional electron backscatter diffraction was used to measure the crystallographic distribution of the electrochemically relevant triple phase boundary lines and surfaces near them in SOFC cathodes made up of a porous mixture of yttria-stabilized zirconia and lanthanum strontium manganese oxide, both before and after mild electrochemical loading. All distributions were observed to be nearly isotropic, but non-random textures above the detection threshold were observed. The distributions differ between the two cells, as do the phase fractions and the electrochemical history. The different distributions are interpreted as evidence that steady-state distributions vary locally with phase fractions or that they evolve during the initial operation of the fuel cell. The rates at which triple lines, pore surfaces, and interface boundaries in the porous mixture approach a steady-state value appear to decrease with the average amount of mass transport required to reorient that specific feature. This work provides initial insights into the crystallography of interfaces in a multiphase ceramic material.

Dillon, Shen; Helmick, Lam; Miller, Herbert M.; Johnson, Christopher; Wilson, Lane; Gemmen, Randall; Petrova, Rumyana; Barmak, Katayun; Gerdes, Kirk; Rohrer, Gregory S.; Salvador, Paul A.

2011-11-01T23:59:59.000Z

360

Comminution employing liquid nitrogen pretreatments  

SciTech Connect

The goal of this project is to develop a methodology that will lead to the establishment of an effective, efficient technique for ultrafine grinding of coal. We believe that the key to successful coal grinding is strongly dependent upon the change of the brittleness of coal under a freezing temperature pretreatment. Furthermore, a cryogenic grinding process may provide the basis for the development of advanced technologies involving the separation of the pyritic minerals from coal. Specific objectives of the program are to: determine the effect of low temperature pretreatments on the microfracture development along the coal/pyrite interface and on the fracture resistance (brittleness) of coal. Specifically, we intend to examine the effect of direct contact of coal with liquid nitrogen, dry ice, and dry-iced acetone. Also, we intend to study pyrite liberation as a result of these treatments; determine the fracture resistance of coal under different low temperature pretreatments; determine the relationships between the fracture resistance of coal and the effectiveness of a grinding process; determine the effect of the frozen coal grinding on the pyrite liberation; evaluate factors which might effect process design, scale-up, and economics; and make a first pass economic assessment of the process. 15 refs., 13 figs., 3 tabs.

Yen, S.C. (Southern Illinois Univ., Carbondale, IL (USA). Dept. of Civil Engineering and Mechanics); Hippo, E.J. (Southern Illinois Univ., Carbondale, IL (USA). Dept. of Mechanical Engineering and Energy Processes)

1990-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Liquid Cryogen Absorber for MICE  

E-Print Network (OSTI)

connected to the cooler and condenser through a liquid feedmixed with liquid) to a condenser attached to the coolervacuum failure. Tube to Condenser Magnet Coil Magnet Mandrel

2005-01-01T23:59:59.000Z

362

Liquid sampling system  

DOE Patents (OSTI)

A conduit extends from a reservoir through a sampling station and back to the reservoir in a closed loop. A jet ejector in the conduit establishes suction for withdrawing liquid from the reservoir. The conduit has a self-healing septum therein upstream of the jet ejector for receiving one end of a double-ended cannula, the other end of which is received in a serum bottle for sample collection. Gas is introduced into the conduit at a gas bleed between the sample collection bottle and the reservoir. The jet ejector evacuates gas from the conduit and the bottle and aspirates a column of liquid from the reservoir at a high rate. When the withdrawn liquid reaches the jet ejector the rate of flow therethrough reduces substantially and the gas bleed increases the pressure in the conduit for driving liquid into the sample bottle, the gas bleed forming a column of gas behind the withdrawn liquid column and interrupting the withdrawal of liquid from the reservoir. In the case of hazardous and toxic liquids, the sample bottle and the jet ejector may be isolated from the reservoir and may be further isolated from a control station containing remote manipulation means for the sample bottle and control valves for the jet ejector and gas bleed.

Larson, Loren L. (Idaho Falls, ID)

1987-01-01T23:59:59.000Z

363

Liquid sampling system  

DOE Patents (OSTI)

A conduit extends from a reservoir through a sampling station and back to the reservoir in a closed loop. A jet ejector in the conduit establishes suction for withdrawing liquid from the reservoir. The conduit has a self-healing septum therein upstream of the jet ejector for receiving one end of a double-ended cannula, the other end of which is received in a serum bottle for sample collection. Gas is introduced into the conduit at a gas bleed between the sample collection bottle and the reservoir. The jet ejector evacuates gas from the conduit and the bottle and aspirates a column of liquid from the reservoir at a high rate. When the withdrawn liquid reaches the jet ejector the rate of flow therethrough reduces substantially and the gas bleed increases the pressure in the conduit for driving liquid into the sample bottle, the gas bleed forming a column of gas behind the withdrawn liquid column and interrupting the withdrawal of liquid from the reservoir. In the case of hazardous and toxic liquids, the sample bottle and the jet ejector may be isolated from the reservoir and may be further isolated from a control station containing remote manipulation means for the sample bottle and control valves for the jet ejector and gas bleed. 5 figs.

Larson, L.L.

1984-09-17T23:59:59.000Z

364

Emergent Phenomena at Oxide Interfaces  

Science Conference Proceedings (OSTI)

Transition metal oxides (TMOs) are an ideal arena for the study of electronic correlations because the s-electrons of the transition metal ions are removed and transferred to oxygen ions, and hence the strongly correlated d-electrons determine their physical properties such as electrical transport, magnetism, optical response, thermal conductivity, and superconductivity. These electron correlations prohibit the double occupancy of metal sites and induce a local entanglement of charge, spin, and orbital degrees of freedom. This gives rise to a variety of phenomena, e.g., Mott insulators, various charge/spin/orbital orderings, metal-insulator transitions, multiferroics, and superconductivity. In recent years, there has been a burst of activity to manipulate these phenomena, as well as create new ones, using oxide heterostructures. Most fundamental to understanding the physical properties of TMOs is the concept of symmetry of the order parameter. As Landau recognized, the essence of phase transitions is the change of the symmetry. For example, ferromagnetic ordering breaks the rotational symmetry in spin space, i.e., the ordered phase has lower symmetry than the Hamiltonian of the system. There are three most important symmetries to be considered here. (i) Spatial inversion (I), defined as r {yields} -r. In the case of an insulator, breaking this symmetry can lead to spontaneous electric polarization, i.e. ferroelectricity, or pyroelectricity once the point group belongs to polar group symmetry. (ii) Time-reversal symmetry (T) defined as t {yields} -t. In quantum mechanics, the time-evolution of the wave-function {Psi} is given by the phase factor e{sup -iEt/{h_bar}} with E being the energy, and hence time-reversal basically corresponds to taking the complex conjugate of the wave-function. Also the spin, which is induced by the 'spinning' of the particle, is reversed by time-reversal. Broken T-symmetry is most naturally associated with magnetism, since the spin operator changes sign with T-operation. (iii) Gauge symmetry (G), which is associated with a change in the phase of the wave-function as {Psi} {yields} e{sup i{theta}}{Psi}. Gauge symmetry is connected to the law of charge conservation, and broken G-symmetry corresponds to superconductivity/superfluidity. To summarize, the interplay among these electronic degrees of freedom produces various forms of symmetry breaking patterns of I, T, and G, leading to novel emergent phenomena, which can appear only by the collective behavior of electrons and cannot be expected from individual electrons. Figure 1 shows this schematically by means of several representative phenomena. From this viewpoint, the interfaces of TMOs offer a unique and important laboratory because I is already broken by the structure itself, and the detailed form of broken I-symmetry can often be designed. Also, two-dimensionality usually enhances the effects of electron correlations by reducing their kinetic energy. These two features of oxide interfaces produce many novel effects and functions that cannot be attained in bulk form. Given that the electromagnetic responses are a major source of the physical properties of solids, and new gauge structures often appear in correlated electronic systems, we put 'emergent electromagnetism' at the center of Fig. 1.

Hwang, H.Y.

2012-02-16T23:59:59.000Z

365

High Integrity Can Design Interfaces  

Science Conference Proceedings (OSTI)

The National Spent Nuclear Fuel Program is chartered with facilitating the disposition of DOE-owned spent nuclear fuel to allow disposal at a geologic repository. This is done through coordination with the repository program and by assisting DOE Site owners of SNF with needed information, standardized requirements, packaging approaches, etc. The High Integrity Can (HIC) will be manufactured to provide a substitute or barrier enhancement for normal fuel geometry and cladding. The can would be nested inside the DOE standardized canister which is designed to interface with the repository waste package. The HIC approach may provide the following benefits over typical canning approaches for DOE SNF. (a) It allows ready calculation and management of criticality issues for miscellaneous. (b) It segments and further isolates damaged or otherwise problem materials from normal SNF in the repository package. (c) It provides a very long term corrosion barrier. (d) It provides an extra internal pressure barrier for particulates, gaseous fission products, hydrogen, and water vapor. (e) It delays any potential release of fission products to the repository environment. (f) It maintains an additional level of fuel geometry control during design basis accidents, rock-fall, and seismic events. (g) When seal welded, it could provide the additional containment required for shipments involving plutonium content in excess of 20 Ci. (10 CFR 71.63.b) if integrated with an appropriate cask design. Long term corrosion protection is central to the HIC concept. The material selected for the HIC (Hastelloy C-22) has undergone extensive testing for repository service. The most severe theoretical interactions between iron, repository water containing chlorides and other repository construction materials have been tested. These expected chemical species have not been shown capable of corroding the selected HIC material. Therefore, the HIC should provide a significant barrier to DOE SNF dispersal long after most commercial SNF has degraded and begun moving into the repository environment.

Shaber, E.L.

1998-08-01T23:59:59.000Z

366

Smoothed particle hydrodynamics model of non-aqueous phase liquid flow and dissolution  

Science Conference Proceedings (OSTI)

A smoothed particle hydrodynamics model was developed to simulate the flow of mixtures of aqueous and non-aqueous phase liquids in porous media and the dissolution of the non-aqueous phase in the aqueous phase. The model was used to study the effects of pore-scale heterogeneity and anisotropy on the steady state dense non-aqueous phase liquid (DNAPL) saturation when gravity driven DNAPL displaces water from initially water saturated porous media. Pore-scale anisotropy was created by using co-oriented non overlapping elliptically shaped grains to represent the porous media. After a steady state DNAPL saturation was reached, water was injected until a new steady state DNAPL saturation was reached. The amount of trapped DNAPL was found to be greater when DNAPL is displaced in the direction of the major axes of the soil grains than when it is displaced in the direction of the minor axes of the soil grains. The amount of trapped DNAPL was also found to increase with decreasing initial saturation of the continuous DNAPL phase. For the conditions used in our simulations, the saturation of the trapped NAPL with a smaller initial DNAPL saturation was more than 3 times larger than the amount of trapped DNAPL with a larger initial saturation. These simulations were carried out assuming that the DNAPL did not dissolve in water. Simulations including the effect of dissolution of DNAPL in the aqueous phase were also performed, and effective (macroscopic) mass transfer coefficients were determined.

Tartakovsky, Alexandre M.; Meakin, Paul; Ward, Anderson L.

2009-01-01T23:59:59.000Z

367

Electrically Deformable Liquid Marbles  

E-Print Network (OSTI)

Liquid marbles, which are droplets coated with a hydrophobic powder, were exposed to a uniform electric field. It was established that a threshold value of the electric field, 15 cgse, should be surmounted for deformation of liquid marbles. The shape of the marbles was described as a prolate spheroid. The semi-quantitative theory describing deformation of liquid marbles in a uniform electric field is presented. The scaling law relating the radius of the contact area of the marble to the applied electric field shows a satisfactory agreement with the experimental data.

Edward Bormashenko; Roman Pogreb; Tamir Stein; Gene Whyman; Marcelo Schiffer; Doron Aurbach

2011-02-17T23:59:59.000Z

368

Property:User Interface | Open Energy Information  

Open Energy Info (EERE)

Interface Interface Jump to: navigation, search This is a property of type String. The allowed values for this property are: Website Spreadsheet Desktop Application Mobile Device Other Pages using the property "User Interface" Showing 25 pages using this property. (previous 25) (next 25) A A New Scheme for the Promotion of Renewable Energies in Developing Countries: The Renewable Energy Regulated Purchase Tariff + Website + AGI-32 + Desktop Application + APFED-Good Practice Database + Website + Accounting for Co-benefits in Asia's Transportation Sector: Methods and Applications + Spreadsheet + ActiveGreenScore + Mobile Device + Advanced Process Engineering Co-Simulator (APECS) + Desktop Application + Agriculture and Land Use National Greenhouse Gas Inventory Software + Desktop Application +

369

Nonlinear Dynamics of Capacitive Charging and Desalination by Porous Electrodes  

E-Print Network (OSTI)

The rapid and efficient exchange of ions between porous electrodes and aqueous solutions is important in many applications, such as electrical energy storage by super-capacitors, water desalination and purification by capacitive deionization (or desalination), and capacitive extraction of renewable energy from a salinity difference. Here, we present a unified mean-field theory for capacitive charging and desalination by ideally polarizable porous electrodes (without Faradaic reactions or specific adsorption of ions) in the limit of thin double layers (compared to typical pore dimensions). We illustrate the theory in the case of a dilute, symmetric, binary electrolyte using the Gouy-Chapman-Stern (GCS) model of the double layer, for which simple formulae are available for salt adsorption and capacitive charging of the diffuse part of the double layer. We solve the full GCS mean-field theory numerically for realistic parameters in capacitive deionization, and we derive reduced models for two limiting regimes wi...

Biesheuvel, P M

2009-01-01T23:59:59.000Z

370

Impact of wettability correlations on multiphase flow through porous media  

E-Print Network (OSTI)

In the last decades, significant progress has been made in understanding the multiphase displacement through porous media with homogeneous wettability and its relation to the pore geometry. However, the role of wettability at the scale of the pore remains still little understood. In the present study the displacement of immiscible fluids through a two-dimensional porous medium is simulated by means of a mesoscopic particle approach. The substrate is described as an assembly of non-overlapping circular disks whose preferential wettability is distributed according to prescribed spatial correlations, from pore scale up to domains at system size. We analyze how this well-defined heterogeneous wettability affects the flow and try to establish a relationship among wettability-correlations and large-scale properties of the multiphase flow.

Marta S. de La Lama; Martin Brinkmann

2012-05-31T23:59:59.000Z

371

Flow-induced channelization in a porous medium  

E-Print Network (OSTI)

We propose a theory for erosional channelization induced by fluid flow in a saturated granular porous medium. When the local fluid flow-induced stress is larger than a critical threshold, grains are dislodged and carried away so that the porosity of the medium is altered by erosion. This in turn affects the local hydraulic conductivity and pressure in the medium and results in the growth and development of channels that preferentially conduct the flow. Our multiphase model involves a dynamical porosity field that evolves along with the volume fraction of the mobile and immobile grains in response to fluid flow that couples the spatiotemporal dynamics of the three phases. Numerical solutions of the resulting initial boundary value problem show how channels form in porous media and highlights how heterogeneity in the erosion threshold dictates the form of the patterns and thus the ability to control them.

Mahadevan, Amala

2010-01-01T23:59:59.000Z

372

Methods for removing contaminant matter from a porous material  

DOE Patents (OSTI)

Methods of removing contaminant matter from porous materials include applying a polymer material to a contaminated surface, irradiating the contaminated surface to cause redistribution of contaminant matter, and removing at least a portion of the polymer material from the surface. Systems for decontaminating a contaminated structure comprising porous material include a radiation device configured to emit electromagnetic radiation toward a surface of a structure, and at least one spray device configured to apply a capture material onto the surface of the structure. Polymer materials that can be used in such methods and systems include polyphosphazine-based polymer materials having polyphosphazine backbone segments and side chain groups that include selected functional groups. The selected functional groups may include iminos, oximes, carboxylates, sulfonates, .beta.-diketones, phosphine sulfides, phosphates, phosphites, phosphonates, phosphinates, phosphine oxides, monothio phosphinic acids, and dithio phosphinic acids.

Fox, Robert V. (Idaho Falls, ID); Avci, Recep (Bozeman, MT); Groenewold, Gary S. (Idaho Falls, ID)

2010-11-16T23:59:59.000Z

373

Chemical cleaning of porous stainless steel cross-flow filter elements for nuclear waste applications  

Science Conference Proceedings (OSTI)

The Waste Treatment and Immobilization Plant (WTP) currently under construction for treatment of High-Level Waste (HLW) at the Hanford Site will rely on cross-flow ultrafiltration to provide solids-liquid separation as a core part of the treatment process. To optimize process throughput, periodic chemical cleaning of the porous stainless steel filter elements has been incorporated into the design of the plant. It is currently specified that chemical cleaning with nitric acid will occur after significant irreversible membrane fouling is observed. Irreversible fouling is defined as fouling that cannot be removed by backpulsing the filter. PNNL has investigated chemical cleaning processes as part of integrated tests with HLW simulants and with actual Hanford tank wastes. To quantify the effectiveness of chemical cleaning, the residual membrane resistance after cleaning was compared against the initial membrane resistance for each test in a series of long-term fouling tests. The impact of the small amount of residual resistance in these tests could not be separated from other parameters and the historical benchmark of >1 GPM/ft2 for clean water flux was determined to be an adequate metric for chemical cleaning. Using the results from these tests, a process optimization strategy is presented suggesting that for the simulant material under test, the value of chemical cleaning may be suspect. The period of enhanced filtration may not be enough to offset the down time required for chemical cleaning, without respect to the other associated costs.

Billing, Justin M.; Daniel, Richard C.; Hallen, Richard T.; Schonewill, Philip P.; Shimskey, Rick W.; Peterson, Reid A.

2011-05-10T23:59:59.000Z

374

Direct liquid injection of liquid petroleum gas  

SciTech Connect

A fuel injector and injection system for injecting liquified petroleum gas (LPG) into at least one air/fuel mixing chamber from a storage means that stores pressurized LPG in its liquid state. The fuel injector (including a body), adapted to receive pressurized LPG from the storage means and for selectively delivering the LPG to the air/fuel mixing chamber in its liquified state. The system including means for correcting the injector activation signal for pressure and density variations in the fuel.

Lewis, D.J.; Phipps, J.R.

1984-02-14T23:59:59.000Z

375

Porous coatings from wire mesh for bone implants  

DOE Patents (OSTI)

A method of coating areas of bone implant elements and the resulting implant having a porous coating are described. Preselected surface areas are covered by a preform made from continuous woven lengths of wire. The preform is compressed and heated to assure that diffusion bonding occurs between the wire surfaces and between the surface boundaries of the implant element and the wire surfaces in contact with it. Porosity is achieved by control of the resulting voids between the bonded wire portions.

Sump, Kenneth R. (Richland, WA)

1986-01-01T23:59:59.000Z

376

Free-standing luminescent layers of porous silicon  

Science Conference Proceedings (OSTI)

Free-standing layers of porous silicon with a thickness ranging from 50 to 200 {mu}m have been fabricated using an electrolyte composed of HF and acetic acid. Chemical aspects of the etching process associated with the evolution of gases that favor detachment of layers from substrates are considered. The layers exhibit stable photoluminescence in the visible spectral region observed from both of their sides.

Goryachev, D. N., E-mail: Dmitri.Goryachev@mail.ioffe.ru; Belyakov, L. V.; Sreseli, O. M. [Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)

2010-12-15T23:59:59.000Z

377

ENCAPSULATION OF PALLADIUM IN POROUS WALL HOLLOW GLASS MICROSPHERES  

DOE Green Energy (OSTI)

A new encapsulation method was investigated in an attempt to develop an improved palladium packing material for hydrogen isotope separation. Porous wall hollow glass microspheres (PWHGMs) were produced by using a flame former, heat treating and acid leaching. The PWHGMs were then filled with palladium salt using a soak-and-dry process. The palladium salt was reduced at high temperature to leave palladium inside the microspheres.

Heung, L; George Wicks, G; Ray Schumacher, R

2008-04-09T23:59:59.000Z

378

Liquidity facilities and signaling  

E-Print Network (OSTI)

This dissertation studies the role of signaling concerns in discouraging access to liquidity facilities like the IMF contingent credit lines (CCL) and the Discount Window (DW). In Chapter 1, I analyze the introduction of ...

Arregui, Nicolás

2010-01-01T23:59:59.000Z

379

Liquid level controller  

DOE Patents (OSTI)

A system for maintaining two distinct sodium levels within the shell of a heat exchanger having a plurality of J-shaped modular tube bundles each enclosed in a separate shell which extends from a common base portion. A lower liquid level is maintained in the base portion and an upper liquid level is maintained in the shell enwrapping the long stem of the J-shaped tube bundles by utilizing standpipes with a notch at the lower end which decreases in open area the distance from the end of the stand pipe increases and a supply of inert gas fed at a constant rate to produce liquid levels, which will remain generally constant as the flow of liquid through the vessel varies. (auth)

Mangus, J.D.; Redding, A.H.

1975-07-15T23:59:59.000Z

380

Sol-gel derived ceramic electrolyte films on porous substrates  

DOE Green Energy (OSTI)

A process for the deposition of sol-gel derived thin films on porous substrates has been developed; such films should be useful for solid oxide fuel cells and related applications. Yttria-stabilized zirconia films have been formed from metal alkoxide starting solutions. Dense films have been deposited on metal substrates and ceramic substrates, both dense and porous, through dip-coating and spin-coating techniques, followed by a heat treatment in air. X-ray diffraction has been used to determine the crystalline phases formed and the extent of reactions with various substrates which may be encountered in gas/gas devices. Surface coatings have been successfully applied to porous substrates through the control of substrate pore size and deposition parameters. Wetting of the substrate pores by the coating solution is discussed, and conditions are defined for which films can be deposited over the pores without filling the interiors of the pores. Shrinkage cracking was encountered in films thicker than a critical value, which depended on the sol-gel process parameters and on the substrate characteristics. Local discontinuities were also observed in films which were thinner than a critical value which depended on the substrate pore size. A theoretical discussion of cracking mechanisms is presented for both types of cracking, and the conditions necessary for successful thin formation are defined. The applicability of these film gas/gas devices is discussed.

Kueper, T.W.

1992-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Nonconventional Liquid Fuels  

Reports and Publications (EIA)

Higher prices for crude oil and refined petroleum products are opening the door for nonconventional liquids to displace petroleum in the traditional fuel supply mix. Growing world demand for diesel fuel is helping to jump-start the trend toward increasing production of nonconventional liquids, and technological advances are making the nonconventional alternatives more viable commercially. Those trends are reflected in the AEO2006 projections.

Information Center

2006-02-01T23:59:59.000Z

382

Ultrasonic characterization of interfaces in composite bonds  

SciTech Connect

The inverse determination of imperfect interfaces from reflection spectra of normal and oblique incident ultrasonic waves in adhesive bonds of multidirectional composites is investigated. The oblique measurements are complicated by the highly dispersed nature of oblique wave spectra at frequencies above 3MHz. Different strategies for bond property reconstruction, including a modulation method, are discussed. The relation of measured interfacial spring density to the physico-chemical model of a composite interface described by polymer molecular bonds to emulate loss of molecular strength on an adhesive composite interface is discussed. This potentially relates the interfacial (adhesion) strength (number of bonds at the adhesive substrate interface) to the spring constant (stiffness) area density (flux), which is an ultrasonically measurable parameter.

Wang, N.; Lobkis, O. I.; Rokhlin, S. I. [Ohio State University, Edison Joining Technology Center, 1248 Arthur E Adams Drive, Columbus OH 43221 (United States); Cantrell, J. H. [NASA Langley Research Center, Mail Stop 231, Hampton, Virginia 23681 (United States)

2011-06-23T23:59:59.000Z

383

Film bonded fuel cell interface configuration  

DOE Patents (OSTI)

The present invention relates to improved elements for use in fuel cell stacks, and more particularly, to a stack having a corrosion-resistant, electrally conductive, fluid-impervious interface member therein.

Kaufman, Arthur (West Orange, NJ); Terry, Peter L. (Chatham, NJ)

1989-01-01T23:59:59.000Z

384

Interface control of bulk ferroelectric polarization  

SciTech Connect

The control of material interfaces at the atomic level has led to no- vel interfacial properties and functionalities. In particular, the study of polar discontinuities at interfaces between complex oxides lies at the frontier of modern condensed matter research. Here we em- ploy a combination of experimental measurements and theoretical calculations to demonstrate the control of a bulk property, namely ferroelectric polarization, of a heteroepitaxial bilayer by precise atomic-scale interface engineering. More specifically, the control is achieved by exploiting the interfacial valence mismatch to influence the electrostatic potential step across the interface, which manifests itself as the biased-voltage in ferroelectric hysteresis loops and determines the ferroelectric state. A broad study of diverse systems comprising different ferroelectrics and conducting perovskite un- derlayers extends the generality of this phenomenon.

Yu, P [University of California, Berkeley; Luo, Weidong [ORNL; Yi, D. [University of California, Berkeley; Zhang, J.-X. [University of California, Berkeley; Rossell, M.D. [Lawrence Berkeley National Laboratory (LBNL); Yang, C.-H. [Korea Advanced Institute of Science and Technology; You, L. [University of California, Berkeley; Singh-Bhalla, G. B. [University of California, Berkeley & LBNL; Yang, S.Y [University of California, Berkeley; He, Q [University of California, Berkeley; Ramasse, Q. M. [Lawrence Berkeley National Laboratory (LBNL); Erni, R. [Lawrence Berkeley National Laboratory (LBNL); Martin, L. W. [University of Illinois, Urbana-Champaign; Chu, Y. H. [University of California, Berkeley; Pantelides, Sokrates T [ORNL; Pennycook, Stephen J [ORNL; Ramesh, R. [University of California, Berkeley

2012-01-01T23:59:59.000Z

385

Guidelines for Control Center Application Program Interfaces  

Science Conference Proceedings (OSTI)

Applying the interoperability concept to the utility control center requires application program interfaces (API) for energy management systems (EMS). This report contains guidelines for achieving plug compatibility of application programs in the control center EMS.

1996-07-02T23:59:59.000Z

386

Micro-polarimeter for high performance liquid chromatography  

DOE Patents (OSTI)

A micro-polarimeter interfaced with a system for high performance liquid chromatography, for quantitatively analyzing micro and trace amounts of optically active organic molecules, particularly carbohydrates. A flow cell with a narrow bore is connected to a high performance liquid chromatography system. Thin, low birefringence cell windows cover opposite ends of the bore. A focused and polarized laser beam is directed along the longitudinal axis of the bore as an eluent containing the organic molecules is pumped through the cell. The beam is modulated by air gap Faraday rotators for phase sensitive detection to enhance the signal to noise ratio. An analyzer records the beams's direction of polarization after it passes through the cell. Calibration of the liquid chromatography system allows determination of the quantity of organic molecules present from a determination of the degree to which the polarized beam is rotated when it passes through the eluent.

Yeung, Edward E. (Ames, IA); Steenhoek, Larry E. (Wilmington, DE); Woodruff, Steven D. (Morgantown, WV); Kuo, Jeng-Chung (Skokie, IL)

1985-01-01T23:59:59.000Z

387

Natural-gas liquids  

SciTech Connect

Casinghead gasoline or natural gasoline, now more suitably known as natural-gas liquids (NGL), was a nuisance when first found, but was developed into a major and profitable commodity. This part of the petroleum industry began at about the turn of the century, and more than 60 yr later the petroleum industry recovers approx. one million bbl of natural-gas liquids a day from 30 billion cu ft of natural gas processed in more than 600 gasoline plants. Although casinghead gasoline first was used for automobile fuel, natural-gas liquids now are used for fuel, industrial solvents, aviation blending stock, synthetic rubber, and many other petrochemical uses. Production from the individual plants is shipped by tank car, tank truck, pipeline, and tankers all over the world. Most of the natural-gas liquids come from wet natural gas which contains a considerable quantity of vapor, ranging from 0.5 to 6 gal/Mcf, and some particularly rich gases contain even more which can be liquefied. Nonassociated gas is generally clean, with a comparatively small quantity of gasoline, 0.1 to 0.5 gas/Mcf. The natural-gas liquids branch of the industry is build around the condensation of vapors in natural gas. Natural-gas liquids are processed either by the compression method or by adsorption processes.

Blackstock, W.B.; McCullough, G.W.; McCutchan, R.C.

1968-01-01T23:59:59.000Z

388

T-526: Microsoft Internet Explorer 'ReleaseInterface()' Remote...  

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

526: Microsoft Internet Explorer 'ReleaseInterface()' Remote Code Execution Vulnerability T-526: Microsoft Internet Explorer 'ReleaseInterface()' Remote Code Execution...

389

T-703: Cisco Unified Communications Manager Open Query Interface...  

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

703: Cisco Unified Communications Manager Open Query Interface Lets Remote Users Obtain Database Contents T-703: Cisco Unified Communications Manager Open Query Interface Lets...

390

Implementation of the Clinical Research Query Interface VISAGE.  

E-Print Network (OSTI)

??An innovative new query interface called VISAGE (VISual AGgregator and Explorer) has been developed for use in the PhysioMIMI system. This interface consists of three… (more)

Sandberg, Neil L.

2010-01-01T23:59:59.000Z

391

Atomic Cu/Nb Interface Structures Characterized by Transmission ...  

Science Conference Proceedings (OSTI)

To understand the interface effect on mechanical behavior, atomic Cu/Nb interface structures were studied by (scanning) transmission electron microscopy  ...

392

Advanced Thermal Interface Materials for Power Electronics (Presentation)  

DOE Green Energy (OSTI)

Advancing thermal interface materials for power electronics is a critical factor in power electronics equipment. NREL aims to improve thermal interface materials for power electronics technologies.

Narumanchi, S.

2007-11-08T23:59:59.000Z

393

Stationary liquid drops in Lorentz-Minkowski space  

E-Print Network (OSTI)

This paper analyzes the configurations of shapes that shows a spacelike liquid drop in Minkowski space deposited over a spacelike plane $\\Pi$. We assume the presence of a uniform gravity field directed toward $\\Pi$ and that the volume of the drop is prescribed. Our interest are the liquid drops that are critical points of the energy of the corresponding mechanical system and we will say then that the liquid drop is stationary. In such case, the liquid-air interface is determined by the condition that the mean curvature is a linear function of distance from $\\Pi$ and that the drop makes a constant hyperbolic angle of contact with the plate $\\Pi$. As first result, we shall prove that the liquid drop must be rotational symmetric with respect to an axis orthogonal to $\\Pi$. Then we prove the existence and uniqueness of symmetric solutions for a given angle of contact with $\\Pi$. Finally, we shall study the shapes that a liquid drop can adopt in terms of its size. So, we shall derive estimates of its height, volume and area of the wetted surface on $\\Pi$.

Rafael Lopez

2005-01-12T23:59:59.000Z

394

A Study of Heat Transfer in a Composite Wall Collector System with Porous Absorber  

E-Print Network (OSTI)

In this paper, heat transfer and flow in a composite solar wall with porous absorber has been studied. The unsteady numerical simulation is employed to analyze the performance of the flow and temperature field in the composite solar wall. The excess heat is stored in the porous absorber and wall by the incident solar radiation and there is a temperature gradient in the porous layer. Therefore, the porous absorber works as thermal insulator in a degree when no solar shining is available. The influence of the porosity within the porous absorber on the air flow in the porous absorber is significant. The results show that all these factors should be taken into account for a better design of a heating system.

Chen, W.

2006-01-01T23:59:59.000Z

395

High-performance porous silicon solar cell development. Final report, October 1, 1993--September 30, 1995  

DOE Green Energy (OSTI)

The goal of the program was to demonstrate use of porous silicon in new solar cell structures. Porous silicon technology has been developed at Spire for producing visible light-emitting diodes (LEDs). The major aspects that they have demonstrated are the following: porous silicon active layers have been made to show photovoltaic action; porous silicon surface layers can act as antireflection coatings to improve the performance of single-crystal silicon solar cells; and porous silicon surface layers can act as antireflection coatings on polycrystalline silicon solar cells. One problem with the use of porous silicon is to achieve good lateral conduction of electrons and holes through the material. This shows up in terms of poor blue response and photocurrents which increase with increasing reverse bias applied to the diode.

Maruska, P. [Spire Corp., Bedford, MA (United States)

1996-09-01T23:59:59.000Z

396

Gas-Phase Diffusion in Porous Media: Comparison of Models Stephen W. Webb  

Office of Scientific and Technical Information (OSTI)

Gas-Phase Diffusion in Porous Media: Comparison of Models Gas-Phase Diffusion in Porous Media: Comparison of Models Stephen W. Webb Sandia National Laboratories Albuquerque, New Mexico 87 185 ABSTRACT Two models are commonly used to analyze gas- phase diffusion in porous media in the presence of advection, the Advective-Dispersive Model (ADM) and the Dusty-gas Model (DGM). The ADM, which is used in TOUGH2, is based on a simple linear addition of advection calculated by Darcy's law and ordinary diffusion using Fick's law with a porosity- tortuosity-gas saturation multiplier to account for the porous medium. Another approach for gas-phase transport in porous media is the Dusty-Gas Model. This model applies the kinetic theory of gases to the gaseous components and the porous media (or "dust") to combine transport due to diffusion and

397

A Universal Speech Interface for Appliances  

E-Print Network (OSTI)

Can a single, universal speech interface look-and-feel be used to effectively control a wide variety of appliances? Can such an interface be automatically derived from a functional appliance specification? We built the Speech Graffiti Personal Universal Controller (SG-PUC), a universal interface and framework for human-appliance speech interaction, as a proof-of-concept. Its specification language and communications protocol effectively separate the SG-PUC from the appliances that it controls, enabling mobile and universal speech-based appliance control. To realize such an automatically derived dialog system, the controller employs a universal control language. The development of interfaces to numerous appliances and the results of user studies demonstrate the usefulness of the SG-PUC, indicating that high quality and low cost human-appliance speech interface can be largely appliance agnostic. This investigation also helps to validate the principles of Speech Graffiti as a speech interface paradigm, and provides a baseline for future studies in this area.

Thomas Kevin Harris

2004-01-01T23:59:59.000Z

398

Coupled modeling of non-isothermal multiphase flow, solutetransport and reactive chemistry in porous and fractured media: 1. ModelDevelopment and Validation  

Science Conference Proceedings (OSTI)

Coupled modeling of subsurface multiphase fluid and heat flow, solute transport and chemical reactions can be used for the assessment of acid mine drainage remediation, mineral deposition, waste disposal sites, hydrothermal convection, contaminant transport, and groundwater quality. Here they present a numerical simulation model, TOUGHREACT, which considers non-isothermal multi-component chemical transport in both liquid and gas phases. A wide range of subsurface thermo-physical-chemical processes is considered. The model can be applied to one-, two- or three-dimensional porous and fractured media with physical and chemical heterogeneity. The model can accommodate any number of chemical species present in liquid, gas and solid phases. A variety of equilibrium chemical reactions is considered, such as aqueous complexation, gas dissolution/exsolution, cation exchange, and surface complexation. Mineral dissolution/precipitation can proceed either subject to local equilibrium or kinetic conditions. The coupled model employs a sequential iteration approach with reasonable computing efficiency. The development of the governing equations and numerical approach is presented along with the discussion of the model implementation and capabilities. The model is verified for a wide range of subsurface physical and chemical processes. The model is well suited for flow and reactive transport in variably saturated porous and fractured media. In the second of this two-part paper, three applications covering a variety of problems are presented to illustrate the capabilities of the model.

Xu, Tianfu; Pruess, Karsten

1998-09-01T23:59:59.000Z

399

Fabrication of Porous Metals with Directional Pores through ...  

Science Conference Proceedings (OSTI)

Gas-forming compounds such as hydrides were added into the molten metal to ... of Iron Compounds Complex Particles by Pulsed Laser Irradiation in Liquids.

400

Fast, Low Cost Method for Manufacturing Porous Structures for ...  

Fuel cell or catalyst deposition supports; Gas diffusion layers; Filtration or reactive filtration structures for hot gas and liquid, water, air, ...

Note: This page contains sample records for the topic "liquid porous interfaces" 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

VOLUME 85, NUMBER 18 P H Y S I C A L R E V I E W L E T T E R S 30 OCTOBER 2000 Phonons, Rotons, and Layer Modes of Liquid 4He in Aerogel  

E-Print Network (OSTI)

, and Layer Modes of Liquid 4He in Aerogel B. Fåk* and O. Plantevin Département de Recherche Fondamentale sur filled aerogel. Using complementary high-energy resolution and high statistical precision neutron scattering instruments, and two different 87% porous aerogel samples, we show that the three-dimensional (3D

Glyde, Henry R.

402

Static and dynamic response of a fluid-fluid interface to electric point and line charge  

SciTech Connect

We consider the behavior of a dielectric fluid-fluid interface in the presence of a strong electric field from a point charge and line charge, respectively, both statically and, in the latter case, dynamically. The fluid surface is elevated above its undisturbed level until balance is reached between the electromagnetic lifting force, gravity and surface tension. We derive ordinary differential equations for the shape of the fluid-fluid interface which are solved numerically with standard means, demonstrating how the elevation depends on field strength and surface tension coefficient. In the dynamic case of a moving line charge, the surface of an inviscid liquid-liquid interface is left to oscillate behind the moving charge after it has been lifted against the force of gravity. We show how the wavelength of the oscillations depends on the relative strength of the forces of gravity and inertia, whereas the amplitude of the oscillations is a nontrivial function of the velocity at which the line charge moves. - Highlights: Black-Right-Pointing-Pointer Fluid surface elevation analyzed near a static point and line charge. Black-Right-Pointing-Pointer Elevation determined by interaction of gravity, dielectric force and surface tension. Black-Right-Pointing-Pointer Dynamic equation of motion for the moving line charge is derived. Black-Right-Pointing-Pointer Surface waves behind moving charge calculated and analysed for different velocities.

Ellingsen, Simen A, E-mail: simen.a.ellingsen@ntnu.no; Brevik, Iver, E-mail: iver.h.brevik@ntnu.no

2012-12-15T23:59:59.000Z

403

In-Situ Neutron Diffraction Study of Porous NiO-YSZ Composite ...  

Science Conference Proceedings (OSTI)

Presentation Title, In-Situ Neutron Diffraction Study of Porous NiO-YSZ Composite ... Gas Turbines of the Future: Hydrogen and Oxy-Combustion Environments.

404

Manipulation of surface chemistry and nanostructure in porous silicon-based chemical sensors  

E-Print Network (OSTI)

porous film followed by heating in an oven at 180 °C for 30in base, followed by heating in an oven at 70 ?C for 1 hour.

Ruminski, Anne Marie

2009-01-01T23:59:59.000Z

405

Heat transfer through porous multiphase systems measurement, modelling and applications in printing of coated papers.  

E-Print Network (OSTI)

??This work examines the thermal transfer through porous media by means of measurement of the effective thermal conductivity and modelling of the structural parameters. While… (more)

Gerstner, Philip

2010-01-01T23:59:59.000Z

406

Phase Field Simulation of Ni4Ti3 Precipitation in Porous NiTi Shape ...  

Science Conference Proceedings (OSTI)

Generally, porous NiTi alloys may undergo thermomechnical treatment which .... of First Derivative of Dilatation in Low Carbon Steels Multi-Phase Presenting.

407

On some problems in the simulation of flow and transport through porous media.  

E-Print Network (OSTI)

??The dynamic solution of multiphase flow through porous media is of special interest to several fields of science and engineering, such as petroleum, geology and… (more)

Thomas, Sunil George

2009-01-01T23:59:59.000Z

408

Heat transfer to and from a reversible thermosiphon placed in porous media.  

E-Print Network (OSTI)

??The primary focus of this work is an assessment of heat transfer to and from a reversible thermosiphon imbedded in porous media. The interest in… (more)

Kekelia, Bidzina

2012-01-01T23:59:59.000Z

409

Energy Absorption of Novel Macro-Porous Three-phase Syntactic ...  

Science Conference Proceedings (OSTI)

Presentation Title, Energy Absorption of Novel Macro-Porous Three-phase ... and high-momentum impacts to critical infrastructure, it has become increasingly ...

410

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

E-Print Network (OSTI)

insulation for building, porous heat exchangers and many others applications. Havstad and Burns [11] used practical applications. These include geothermal engineering, thermal insulation systems, packed bed

Lopez, John M.

411

Development of enzymatic biofuel cell based on carbon nanotube electrodes on porous silicon.  

E-Print Network (OSTI)

??The work presented in this thesis has focused on designing and characterizing biofuel cell electrodes using porous silicon (p-Si) as the substrate or current collecting… (more)

Yang, Fan

2007-01-01T23:59:59.000Z

412

Simulation of multiple fluids with solid–liquid phase?transition  

Science Conference Proceedings (OSTI)

Physically based multiphase fluid simulation has been a hot topic in computer graphics. Since there are complex changing interface topology and interactions among air, solid, and different fluids, few papers have devoted to simulate the multiple fluids ... Keywords: free surface, hierarchical lattice, multiple fluids, solid–liquid phase transition

Changbo Wang; Qiang Zhang; Huajun Xiao; Qiuyan Shen

2012-05-01T23:59:59.000Z

413

Frostbite Theater - Liquid Nitrogen Experiments - Dry Ice vs. Liquid  

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

Egg + Liquid Nitrogen + Time-lapse! Egg + Liquid Nitrogen + Time-lapse! Previous Video (Egg + Liquid Nitrogen + Time-lapse!) Frostbite Theater Main Index Next Video (Liquid Nitrogen Cooled Dry Ice in Water!) Liquid Nitrogen Cooled Dry Ice in Water! Dry Ice vs. Liquid Nitrogen! Dry ice is cold. Liquid nitrogen is cold, too. What happens when the two are mixed together? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Have you ever wondered what happens when you mix dry ice and liquid nitrogen? Steve: Well, we just happen to have a chunk of dry ice left over from when we filmed 'How to Make a Cloud Chamber,' and here at Jefferson Lab, liquid nitrogen flows like water, so we're going to find out!

414

An interface tracking model for droplet electrocoalescence.  

SciTech Connect

This report describes an Early Career Laboratory Directed Research and Development (LDRD) project to develop an interface tracking model for droplet electrocoalescence. Many fluid-based technologies rely on electrical fields to control the motion of droplets, e.g. microfluidic devices for high-speed droplet sorting, solution separation for chemical detectors, and purification of biodiesel fuel. Precise control over droplets is crucial to these applications. However, electric fields can induce complex and unpredictable fluid dynamics. Recent experiments (Ristenpart et al. 2009) have demonstrated that oppositely charged droplets bounce rather than coalesce in the presence of strong electric fields. A transient aqueous bridge forms between approaching drops prior to pinch-off. This observation applies to many types of fluids, but neither theory nor experiments have been able to offer a satisfactory explanation. Analytic hydrodynamic approximations for interfaces become invalid near coalescence, and therefore detailed numerical simulations are necessary. This is a computationally challenging problem that involves tracking a moving interface and solving complex multi-physics and multi-scale dynamics, which are beyond the capabilities of most state-of-the-art simulations. An interface-tracking model for electro-coalescence can provide a new perspective to a variety of applications in which interfacial physics are coupled with electrodynamics, including electro-osmosis, fabrication of microelectronics, fuel atomization, oil dehydration, nuclear waste reprocessing and solution separation for chemical detectors. We present a conformal decomposition finite element (CDFEM) interface-tracking method for the electrohydrodynamics of two-phase flow to demonstrate electro-coalescence. CDFEM is a sharp interface method that decomposes elements along fluid-fluid boundaries and uses a level set function to represent the interface.

Erickson, Lindsay Crowl

2013-09-01T23:59:59.000Z

415

Simple numerical simulation for liquid dominated geothermal reservoir  

SciTech Connect

A numerical model for geothermal reservoir has been developed. The model used is based on an idealized, two-dimensional case, where the porous medium is isotropic, nonhomogeneous, filled with saturated liquid. The fluids are assumed to have constant and temperature dependent viscosity. A Boussinesq approximation and Darcy’s law are used. The model will utilize a simple hypothetical geothermal system, i.e. graben within horsts structure, with three layers of different permeabilities. Vorticity plays an importance roles in the natural convection process, and its generation and development do not depend only on the buoyancy, but also on the magnitude and direction relation between the flow velocity and the local gradient of permeability to viscosity ratio. This model is currently used together with a physical, scaled-down reservoir model to help conceptual modeling.

Wintolo, Djoko; Sutrisno; Sudjatmiko; Sudarman, S.

1996-01-24T23:59:59.000Z

416

Advanced Thermal Interface Materials (TIMs) for Power Electronics (Presentation)  

DOE Green Energy (OSTI)

This presentation describes our progress in the area of thermal interface materials for power electronics applications.

Narumanchi, S.

2009-05-01T23:59:59.000Z

417

Design by physical composition for complex tangible user interfaces  

Science Conference Proceedings (OSTI)

In this paper, we present a novel approach to create devices with tangible user interfaces by physical com-position. While the separation of the user interface from the application logic has a long tradition in software engineering, for products with ... Keywords: 3d printing, dialog independence, evolutionary prototyping, paper prototyping, physical interfaces, physical prototyping, smart products, tangible user interfaces

Tanja Doering; Bastian Pfleging; Christian Kray; Albrecht Schmidt

2010-04-01T23:59:59.000Z

418

Temperature Dependent Interface Energy and Mobility Anisotropy in ...  

Science Conference Proceedings (OSTI)

Presentation Title, Temperature Dependent Interface Energy and Mobility Anisotropy ... Engineering New Functionalities in Materials: Large Electromechanical ...

419

Atomic Scale Characterization of Complex Oxide Interfaces  

SciTech Connect

Complex oxides exhibit the most disparate behaviors, from ferroelectricity to high Tc superconductivity, colossal magnetoresistance to insulating properties. For these reasons, oxide thin films are of interest for electronics and the emerging field of spintronics. But epitaxial complex oxide ultrathin films and heterostructures can be significantly affected or even dominated by the presence of interfaces and may exhibit intriguing new physical properties quite different from the bulk. A study of the relations between structure and chemistry at the atomic scale is needed to understand the macroscopic properties of such "interface-controlled" materials. For this purpose, the combination of aberration corrected Z-contrast scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) represents a very powerful tool. The availability of sub- ngstr m probes allows a level of unprecedented detail when analyzing not only the interface structure with sensitivity to single atoms, but also the interface chemistry. In this work state of the art STEM-EELS will be applied to the study of different oxide interfaces in heterostructures with titanates, manganites and cuprates based on the perovskite structure.

Varela del Arco, Maria [ORNL; Pennycook, Timothy J [ORNL; Tian, Wei [ORNL; Mandrus, David [ORNL; Pennycook, Stephen J [ORNL; Pena, V. [Universidad Complutense, Spain; Sefrioui, Z. [Universidad Complutense, Spain; Santamaria, J. [Universidad Complutense, Spain

2006-01-01T23:59:59.000Z

420

IBECS network/ballast interface: Final report  

SciTech Connect

This report describes the work performed to design, develop, and demonstrate an IBECS network/ballast interface that is useful for economically dimming controllable ballasts in commercial buildings. The first section of the report provides the general background of the IBECS (Integrated Building Environmental Communications System) research and development work as well as the context for the development of the network/ballast interface. The research and development effort that went into producing the first proof-of-concept circuit and the physical prototype of that concept is detailed in the second section. In the third section of the report, we describe the lessons learned from the first demonstration of the network/ballast interface at an office at LBNL. The fourth section describes how electrical noise interference encountered with the first generation of interface led to design changes for a refined prototype that hardened the interface from electrical noise generated by the ballast. The final section of the report discusses the performance of refined prototype after we replaced the proof-of-concept prototype with the refined prototypes in the demonstration office at LBNL.

Rubinstein, Francis; Pettler, Pete

2001-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

"Collaborative mobile user interface design": how should companies design the mobile user interface together?  

Science Conference Proceedings (OSTI)

The special session will discuss challenges, real-world examples and future directions in the collaborative design of the user interfaces of mobile services, devices and application in and between Asia and the West. Keywords: China, collaborative-design, design webs, mobile user interface, personal experience design

David M L Williams

2006-10-01T23:59:59.000Z

422

The behavior of NaOH at the air-water interface, a computational study  

DOE Green Energy (OSTI)

Molecular dynamics simulations with a polarizable multi-state empirical valence bond model were carried out to investigate NaOH dissociation and pairing in water bulk and at the air-water interface. It was found that NaOH readily dissociates in the bulk, and the effect of the air-water interface on NaOH dissociation is fairly minor. Also, NaOH complexes were found to be strongly repelled from the air-water interface, which is consistent with surface tension measurements. At the same time, a very strong preference for the hydroxide anion to be oriented towards the air was found that persisted a few angstroms towards the liquid from the Gibbs dividing surface of the air-water interface. This was due to a preference for the hydroxide anion to have its hydrogen pointing towards the air, and the fact that the sodium ion was more likely to be found near the hydroxide oxygen than hydrogen. As a consequence, the simulation results show that surfaces of NaOH solutions should be negatively charged, in agreement with experimental observations, but also that the hydroxide has little surface affinity. This provides the possibility that the surface of water can be devoid of hydroxide anions, but still have a strong negative charge. This work was supported by the US Department of Energy Basic Energy Sciences' Chemical Sciences, Geosciences & Biosciences Division. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

Wick, Collin D.; Dang, Liem X.

2010-07-14T23:59:59.000Z

423

Heart Interface Corporation | Open Energy Information  

Open Energy Info (EERE)

Heart Interface Corporation Heart Interface Corporation Jump to: navigation, search Name Heart Interface Corporation Place Kent, Washington State Zip 98032 Sector Solar, Vehicles Product Manufacturers of power inverters for remoted solar powered residences, vehicles and marine applications. Bought by Xantrex in 2000. Coordinates 41.150928°, -81.358223° 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":41.150928,"lon":-81.358223,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

424

Colloidal templating at a cholesteric - oil interface: Assembly guided by an array of disclination lines  

E-Print Network (OSTI)

We simulate colloids (radius $R \\sim 1\\mu$m) trapped at the interface between a cholesteric liquid crystal and an immiscible oil, at which the helical order (pitch p) in the bulk conflicts with the orientation induced at the interface, stabilizing an ordered array of disclinations. For weak anchoring strength W of the director field at the colloidal surface, this creates a template, favoring particle positions eitheron top of or midway between defect lines, depending on $\\alpha = R/p$. For small $\\alpha$, optical microscopy experiments confirm this picture, but for larger $\\alpha$ no templating is seen. This may stem from the emergence at moderate W of a rugged energy landscape associated with defect reconnections.

J. S. Lintuvuori; A. C. Pawsey; K. Stratford; M. E. Cates; P. S. Clegg; D. Marenduzzo

2013-11-08T23:59:59.000Z

425

On the Fluid Dynamical Theory of Turbulent Gas Transfer Across an Air-Sea Interface in the Presence of Breaking Wind-Waves  

Science Conference Proceedings (OSTI)

It is shown that in order to describe the transfer of gases in the liquid near the air-sea interface, the vertical structure of three-dimensional small-scale turbulence in turbulent patches generated by breaking waves must be considered. The ...

S. A. Kitaigorodskii

1984-05-01T23:59:59.000Z

426

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen in a  

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

Freeze Liquid Nitrogen! Freeze Liquid Nitrogen! Previous Video (Let's Freeze Liquid Nitrogen!) Frostbite Theater Main Index Next Video (Freeze the Rainbow!) Freeze the Rainbow! Liquid Nitrogen in a Microwave! What happens when the world's most beloved cryogenic liquid meets one of the most common household appliances? Find out when we try to microwave liquid nitrogen! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: A little while ago we received an email from Star of the Sea Catholic School in Virginia Beach, Virginia, asking what happens when you place liquid nitrogen in a microwave. Well, I just happen to have some liquid nitrogen! Steve: And I just happen to have a microwave!

427

IT: IDL TCL/TK Interface  

Science Conference Proceedings (OSTI)

This document describes the tcl command and command types which are us( communicate with IDL via the IDL Remote Procedure Call Interface. IDL is a program for the analysis and visualization of scientific and engineering data. It is supplied by Research Systems, Inc., Boulder, Colorado. In addition to the tcl application libraries necessary to build et, the IDL RPC library, which is part of the IDL distribution is needed. The reader of this document is assumed to be familiar with the et tcl implementation. See EPICS document ET:EPICS TCL/TK Interface by Bob Daly, for further information.

Daly, B.

1995-02-01T23:59:59.000Z

428

A discontinuous Galerkin method for gravity-driven viscous fingering instabilities in porous media  

Science Conference Proceedings (OSTI)

We present a new approach to the simulation of gravity-driven viscous fingering instabilities in porous media flow. These instabilities play a very important role during carbon sequestration processes in brine aquifers. Our approach is based on a nonlinear ... Keywords: Discontinuous Galerkin method, Gravity-driven flows, Porous media flows, Viscous fingering

G. Scovazzi; A. Gerstenberger; S. S. Collis

2013-01-01T23:59:59.000Z

429

Young's modulus evaluation by SAWs for porous silica low-k film with cesium doping  

Science Conference Proceedings (OSTI)

Young's moduli of porous silica low-k films with cesium (Cs) doping are determined by surface acoustic waves (SAWs) in this study. Four low-k samples doped with 0-30ppmwt% Cs in the precursor solution are investigated to check the mechanical promotion ... Keywords: Cesium doping, Low-k film, Porous silica, Surface acoustic waves, Young's modulus

X. Xiao; X. M. Shan; Y. Kayaba; K. Kohmura; H. Tanaka; T. Kikkawa

2011-05-01T23:59:59.000Z

430

Behaviour of oil ganglia displaced by a surfactant solution in a porous medium  

E-Print Network (OSTI)

L-97 Behaviour of oil ganglia displaced by a surfactant solution in a porous medium J. C. Moulu'importance relative des forces de viscosité et des forces capillaires. Abstract. 2014 The velocity of oil ganglia residual oil phase by water injection in a porous medium [1, 2]. These studies have demonstrated

Paris-Sud XI, Université de

431

Parametric analysis of entropy generation in a channel filled with a porous medium  

Science Conference Proceedings (OSTI)

The entropy generation of a mixed convection flow in an inclined channel filled with a porous medium, is studied in the present paper. The constant flow rate is considered upward and the uniform wall heat flux is into the channel. The analytical solutions ... Keywords: differential equations, entropy generation, mixed convection, porous medium

Dalia Sabina Cimpean; Ioan Pop

2011-05-01T23:59:59.000Z

432

Three-dimensional midpoint displacement algorithm for the generation of fractal porous media  

Science Conference Proceedings (OSTI)

We propose a novel method of generating fractal three-dimensional porous media geometry. The method is an extension of the two-dimensional midpoint displacement method, used to generate realistic looking terrain for graphics applications, to a third ... Keywords: Fractal, Periodic boundary conditions, Porous media generation

Jonathan Jilesen; Jim Kuo; Fue-Sang Lien

2012-09-01T23:59:59.000Z

433

Finite element methods for unsaturated porous solids and their application to dam engineering problems  

Science Conference Proceedings (OSTI)

This work presents a finite element formulation of equations proposed in a companion paper to describe the hyperelastic response of three-phase porous media. Attention is paid to the development of consistent tangents required by the Newton-Raphson procedure ... Keywords: Concrete dams, Hydro-mechanical coupling, Multiphase porous media, Rock mass permeability, Unilateral constraints

C. Callari; A. Abati

2009-04-01T23:59:59.000Z

434

Dispersion of elastic moduli in a porous-cracked rock: Theoretical predictions for squirt-flow  

E-Print Network (OSTI)

. Attenuation and dispersion of compressional waves in fluid-filled porous rocks with partial gas saturationDispersion of elastic moduli in a porous-cracked rock: Theoretical predictions for squirt-flow M Available online xxxx Keywords: Frequency dispersion Rock properties Bimodal porosity Effective medium

Fortin, Jérôme

435

A study of the spontaneous air flow through a moving porous medium  

Science Conference Proceedings (OSTI)

When a layer of porous material such as the felt moves with respect to the surrounding air, the induced pressure difference will drive the air through the moving porous material. In many industrial applications including the paper machine drying pocket ... Keywords: permeable felt, porus medium, spontaneous air flow

Jianyao Mou; G. Randall Straley; Xiaodong Wang

2003-06-01T23:59:59.000Z

436

Effect of aspect ratio on convection in a porous enclosure with partially active thermal walls  

Science Conference Proceedings (OSTI)

The aim of the present numerical investigation is to understand the effect of aspect ratio and partially thermally active zones on convective flow and heat transfer in a rectangular porous enclosure. Five different heating and cooling zones are considered ... Keywords: Aspect ratio, Finite volume method, Natural convection, Partial heating, Porous medium

M. Bhuvaneswari; S. Sivasankaran; Y. J. Kim

2011-11-01T23:59:59.000Z

437

A perturbation solution for forced convection in a porous-saturated duct  

Science Conference Proceedings (OSTI)

Fully developed forced convection through a porous medium bounded by two isoflux parallel plates is investigated analytically on the basis of a Brinkman-Forchheimer model. The matched asymptotic expansion method is applied for small values of the Darcy ... Keywords: Brinkman-Forchheimer model, Forced convection, Pipe flow, Porous media

K. Hooman

2008-01-01T23:59:59.000Z

438

A variational multiscale finite element method for multiphase flow in porous media  

Science Conference Proceedings (OSTI)

We present a stabilized finite element method for the numerical solution of multiphase flow in porous media, based on a multiscale decomposition of pressures and fluid saturations into resolved (or grid) scales and unresolved (or subgrid) scales. The ... Keywords: Conservation laws, Finite elements, Multiphase flow, Porous media, Shocks, Stabilized methods, Variational multiscale, Waterflood

Ruben Juanes

2005-04-01T23:59:59.000Z

439

Numerical simulation of three-phase flow in heterogeneous porous media  

Science Conference Proceedings (OSTI)

We describe an efficient numerical simulator, based on an operator splitting technique, for three-phase flow in heterogeneous porous media that takes into account capillary forces, general relations for the relative permeability functions and variable ... Keywords: central difference scheme, mixed finite elements, non-classical waves, operator splitting, porous media, three-phase flow

Eduardo Abreu; Frederico Furtado; Felipe Pereira

2006-06-01T23:59:59.000Z

440

A variational multiscale finite element method for multiphase flow in porous media  

Science Conference Proceedings (OSTI)

We present a stabilized finite element method for the numerical solution of multiphase flow in porous media, based on a multiscale decomposition of pressures and fluid saturations into resolved (or grid) scales and unresolved (or subgrid) scales. The ... Keywords: conservation laws, finite elements, multiphase flow, porous media, shocks, stabilized methods, variational multiscale, waterflood

Ruben Juanes

2005-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

An efficient S-DDM iterative approach for compressible contamination fluid flows in porous media  

Science Conference Proceedings (OSTI)

In this paper, we develop an efficient splitting domain decomposition method (S-DDM) for compressible contamination fluid flows in porous media over multiple block-divided sub-domains by combining the non-overlapping domain decomposition, splitting, ... Keywords: Compressible contamination flow, Domain decomposition, Extrapolation, Non-overlapping, Porous media, Splitting

Chuanbin Du; Dong Liang

2010-06-01T23:59:59.000Z

442

MEASUREMENTS OF RELATIVE PERMEABILITY FOR STEAM-WATER FLOW IN POROUS MEDIA  

E-Print Network (OSTI)

MEASUREMENTS OF RELATIVE PERMEABILITY FOR STEAM-WATER FLOW IN POROUS MEDIA A REPORT SUBMITTED experimental efforts towards obtaining relative permeability for steam-water flow in a homogeneous porous computer tomography (CT) scanner. Steam fractional flow, crucial in evaluating relative permeabilities

Stanford University

443

Experimental and theoretical thermal performance of double pass solar air heater with porous media  

Science Conference Proceedings (OSTI)

A theoretical model has been developed to predict the thermal performance of double pass solar air heater with porous media. It is composed of five-coupled unsteady nonlinear partial differential equations which are solved by using numerical scheme. ... Keywords: double pass solar collector, iteration, numerical, porous media, solar radiation

M. Yahya; K. Sopian; M. Y. Theeran; M. Y. Othman; M. A. Alghoul; M. Hafidz; A. Zaharim

2008-11-01T23:59:59.000Z

444

Accelerating analysis of void space in porous materials on multicore and GPU platforms  

Science Conference Proceedings (OSTI)

Developing computational tools that enable discovery of new materials for energy-related applications is a challenge. Crystalline porous materials are a promising class of materials that can be used for oil refinement, hydrogen or methane storage as ... Keywords: code optimization, general purpose computation on GPUs, multicore programming, porous materials, screening, zeolites

Richard L Martin; Prabhat; David D Donofrio; James A Sethian; Maciej Haranczyk

2012-11-01T23:59:59.000Z

445

A Lagrangian, stochastic modeling framework for multi-phase flow in porous media  

Science Conference Proceedings (OSTI)

Many of the complex physical processes relevant for compositional multi-phase flow in porous media are well understood at the pore-scale level. In order to study CO"2 storage in sub-surface formations, however, it is not feasible to perform simulations ... Keywords: Lagrangian approach, Multi-phase flow, PDF method, Porous media, Stochastic particle method

Manav Tyagi; Patrick Jenny; Ivan Lunati; Hamdi A. Tchelepi

2008-06-01T23:59:59.000Z

446

Interface Structure of Graphene on SiC( 1000 ) N. Srivastava, Guowei He, Luxmi, and R. M. Feenstra*  

E-Print Network (OSTI)

-4 Torr of disilane or using 1 atm of purified neon, we observe a C-rich interface layer with structure 43 of disilane at 850°C * feenstra@cmu.edu Published in Phys. Rev. B 85, 041404(R) (2012). #12;2 for 5 min of disilane, or in 1 atm of neon.8 In the latter case the neon is cryogenically purified by flowing liquid N2

Feenstra, Randall

447

Properties of Liquid Plutonium  

SciTech Connect

Unalloyed polycrystalline Pu displays extreme thermal expansion behavior, i.e., {alpha} {yields} {beta} {yields} {gamma} {yields} {delta} increases by 25% in volume and {delta} {yields} {var_epsilon} {yields} liquid decreases by 4.5% in volume. Thus, making it difficult to measure density into the liquid state. Dilatometer outfitted with CaF molten metal cell offers a proven capability to measure thermal expansion in molten metals, but has yet to be proven for Pu. Historic data from the liquid nuclear fuels program will prove extremely useful as a guide to future measurements. 3.3at% Ga changes Pu molten metal properties: 50% increase in viscosity and {approx}3% decrease in density. Fe may decrease the density by a small amount assuming an averaging of densities for Pu-Ga and Pu-Fe liquids. More recent Boivineau (2009) work needs some interpretation, but technique is being employed in (U,Pu)O{sub 2} nuclear fuels program (Pu Futures, 2012).

Freibert, Franz J. [Los Alamos National Laboratory; Mitchell, Jeremy N. [Los Alamos National Laboratory; Schwartz, Daniel S. [Los Alamos National Laboratory; Saleh, Tarik A. [Los Alamos National Laboratory; Migliori, Albert [Los Alamos National Laboratory

2012-08-02T23:59:59.000Z

448

ELECTRONS IN NONPOLAR LIQUIDS.  

Science Conference Proceedings (OSTI)

Excess electrons can be introduced into liquids by absorption of high energy radiation, by photoionization, or by photoinjection from metal surfaces. The electron's chemical and physical properties can then be measured, but this requires that the electrons remain free. That is, the liquid must be sufficiently free of electron attaching impurities for these studies. The drift mobility as well as other transport properties of the electron are discussed here as well as electron reactions, free-ion yields and energy levels, Ionization processes typically produce electrons with excess kinetic energy. In liquids during thermalization, where this excess energy is lost to bath molecules, the electrons travel some distance from their geminate positive ions. In general the electrons at this point are still within the coulombic field of their geminate ions and a large fraction of the electrons recombine. However, some electrons escape recombination and the yield that escapes to become free electrons and ions is termed G{sub fi}. Reported values of G{sub fi} for molecular liquids range from 0.05 to 1.1 per 100 eV of energy absorbed. The reasons for this 20-fold range of yields are discussed here.

HOLROYD,R.A.

2002-10-22T23:59:59.000Z

449

Liquid metal hydrogen barriers  

DOE Patents (OSTI)

Hydrogen barriers which comprise liquid metals in which the solubility of hydrogen is low and which have good thermal conductivities at operating temperatures of interest. Such barriers are useful in nuclear fuel elements containing a metal hydride moderator which has a substantial hydrogen dissociation pressure at reactor operating temperatures.

Grover, George M. (Los Alamos, NM); Frank, Thurman G. (Los Alamos, NM); Keddy, Edward S. (Los Alamos, NM)

1976-01-01T23:59:59.000Z

450

Gelled Ionic Liquid-Based Membranes: Achieving a 10,000 GPU Permeance for Post-Combustion Carbon Capture with Gelled Ionic Liquid-Based Membranes  

Science Conference Proceedings (OSTI)

IMPACCT Project: Alongside Los Alamos National Laboratory and the Electric Power Research Institute, CU-Boulder is developing a membrane made of a gelled ionic liquid to capture CO2 from the exhaust of coal-fired power plants. The membranes are created by spraying the gelled ionic liquids in thin layers onto porous support structures using a specialized coating technique. The new membrane is highly efficient at pulling CO2 out of coal-derived flue gas exhaust while restricting the flow of other materials through it. The design involves few chemicals or moving parts and is more mechanically stable than current technologies. The team is now working to further optimize the gelled materials for CO2 separation and create a membrane layer that is less than 1 micrometer thick.

None

2011-02-02T23:59:59.000Z

451

Physical barriers formed from gelling liquids: 1. numerical design of laboratory and field experiments  

Science Conference Proceedings (OSTI)

The emplacement of liquids under controlled viscosity conditions is investigated by means of numerical simulations. Design calculations are performed for a laboratory experiment on a decimeter scale, and a field experiment on a meter scale. The purpose of the laboratory experiment is to study the behavior of multiple gout plumes when injected in a porous medium. The calculations for the field trial aim at designing a grout injection test from a vertical well in order to create a grout plume of a significant extent in the subsurface.

Finsterle, S.; Moridis, G.J.; Pruess, K.; Persoff, P.

1994-01-01T23:59:59.000Z

452

Liquid metal thermoacoustic engine  

DOE Green Energy (OSTI)

We are studying a liquid metal thermoacoustic engine both theoretically and experimentally. This type of engine promises to produce large quantities of electrical energy from heat at modest efficiency with no moving parts. A sound wave is usually thought of as consisting of pressure oscillations, but always attendant to the pressure oscillation are temperature oscillations. The combination produces a rich variety of ''thermoacoustic'' effects. These effects are usually so small that they are never noticed in everyday life; nevertheless under the right circumstances they can be harnessed to produce powerful heat engines, heat pumps, and refrigerators. In our liquid metal thermoacoustic engine, heat flow from a high temperature source to a low temperature sink generates a high-amplitude standing acoustic wave in liquid sodium. This acoustic power is converted to electric power by a simple magnetohydrodynamic effect at the acoustic oscillation frequency. We have developed a detailed thermoacoustic theory applicable to this engine, and find that a reasonably designed liquid sodium engine operating between 700/sup 0/C and 100/sup 0/C should generate about 60 W/cm/sup 2/ of acoustic power at about 1/3 of Carnot's efficiency. Construction of a 3000 W-thermal laboratory model engine has just been completed, and we have exciting preliminary experimental results as of the time of preparation of this manuscript showing, basically, that the engine works. We have also designed and built a 1 kHz liquid sodium magnetohydrodynamic generator and have extensive measurements on it. It is now very well characterized both experimentally and theoretically. The first generator of its kind, it already converts acoustic power to electric power with 40% efficiency. 16 refs., 5 figs.

Swift, G.W.; Migliori, A.; Wheatley, J.C.

1986-01-01T23:59:59.000Z

453

Device for detecting the specific gravity of a liquid. [Patent application  

DOE Patents (OSTI)

A device for detecting the specific gravity of a liquid and a device for detecting the state of charge of a liquid phase electrolyte battery are described. In one embodiment of the present invention, a change in the critical angle of total internal reflection is utilized to determine the index of refraction of the liquid to be measured. It is shown that the index of refraction of the liquid is a function of the specific gravity of the liquid. In applications for measuring the state of charge of a battery, the specific gravity is proportional to the state of charge of the battery. A change in intensity of rays intersecting an interface surface indicates the critical angle which is a direct indication of the specific gravity of the liquid and the state of charge of a battery. In another embodiment, a light beam is projected through a transparent medium and then through a portion of the liquid to be measured. A change in refraction due to a change in the index of refraction of the liquid produces a deflection of the beam which is measured by a detector. The magnitude of deflection of the beam is directly proportional to the specific gravity of the liquid and the state of charge of a battery.

Derouin, C.R.; Kerwin, W.J.; McCormick, J.B.; Bobbett, R.E.

1980-11-18T23:59:59.000Z

454

Energy Basics: Solar Liquid Heating  

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

EERE: Energy Basics Solar Liquid Heating Solar liquid heating systems use a collector with a heat transfer or "working" fluid such as water, antifreeze (usually non-toxic propylene...

455

A unified numerical framework model for simulating flow, transport, and heat transfer in porous and fractured media  

E-Print Network (OSTI)

fluid flow, multicomponent transport, and heat transfer in porous and fractured media,fluid flow, solute transport, and heat transfer occur in porous and fractured media.fluid flow, mass transport, and heat-transfer processes through porous and fractured media.

Wu, Yu-Shu

2004-01-01T23:59:59.000Z

456

Dynamic performance characterization of bound, porous silica gel desiccant  

DOE Green Energy (OSTI)

Drying of air with silica gel is a well established procedure. However, for the specific use of silica gel in a novel desiccant air conditioning system, which continually cools the silica gel and utilizes solar energy for silica gel regeneration, conventional packed bed devices are not suitable. For this system to operate effectively the silica gel must not rise in its temperature or its capacity will be greatly diminished. Dynamic dehumidificatuion performance was investigted for a silica gel desiccant fabricated in bound, porous paper-like sheets. Sheets of various thickness (0.7 to 3 mm) were fabricated and tested under several dynamic flow conditions in a flat rectangular channel apparatus. During each experiment conditions of inlet moisture, air flowrate, and sheet temperature were maintained constant. Comparisons were also made with conventional silica gel pellets and with other forms of bound silica gel. The sheets show superior utilization of silica gel in short times (30 minutes or less). Tests were also made to examine the sheet structure in order to explore the effect of temperature on the porous structure, and to obtain pore size distributions.

Onischak, M.; Gidaspow, D.; Perkari, S.; Sasaki, T.

1979-10-01T23:59:59.000Z

457

Hydraulic properties of adsorbed water films in unsaturated porous media  

SciTech Connect

Adsorbed water films strongly influence residual water saturations and hydraulic conductivities in porous media at low saturations. Hydraulic properties of adsorbed water films in unsaturated porous media were investigated through combining Langmuir's film model with scaling analysis, without use of any adjustable parameters. Diffuse double layer influences are predicted to be important through the strong dependence of adsorbed water film thickness (f) on matric potential ({Psi}) and ion charge (z). Film thickness, film velocity, and unsaturated hydraulic conductivity are predicted to vary with z{sup -1}, z{sup -2}, and z{sup -3}, respectively. In monodisperse granular media, the characteristic grain size ({lambda}) controls film hydraulics through {lambda}{sup -1} scaling of (1) the perimeter length per unit cross sectional area over which films occur, (2) the critical matric potential ({Psi}{sub c}) below which films control flow, and (3) the magnitude of the unsaturated hydraulic conductivity when {Psi} < {Psi}{sub c}. While it is recognized that finer textured sediments have higher unsaturated hydraulic conductivities than coarser sands at intermediate {Psi}, the {lambda}{sup -1} scaling of hydraulic conductivity predicted here extends this understanding to very low saturations where all pores are drained. Extremely low unsaturated hydraulic conductivities are predicted under adsorbed film-controlled conditions (generally < 0.1 mm y{sup -1}). On flat surfaces, the film hydraulic diffusivity is shown to be constant (invariant with respect to {Psi}).

Tokunaga, Tetsu K.

2009-03-01T23:59:59.000Z

458

Rich n-heptane and diesel combustion in porous media  

SciTech Connect

Rich n-heptane and diesel flames in two-layer porous media are experimentally investigated in the context of syngas production. The stable operating points of n-heptane reforming have been determined and the mole fractions of H{sub 2}, CO, CO{sub 2} and light hydrocarbons have been measured in the exhaust gas at an equivalence ratio of 2 for different thermal input values. The reformer performance has been assessed also from the point of view of the heat losses and the mixture homogeneity. The pre-vapouriser produces an approximately uniform vapour-air mixture upstream of the flame front. The range of flow rates for stable flames decreased with increasing equivalence ratio. Heat losses were about 10% of the thermal input at high firing rates. A 77.2% of the equilibrium H{sub 2} was achieved at a flame speed of 0.82 m/s. The same reactor with a different porous matrix for the reforming stage demonstrates diesel reforming to syngas with a conversion efficiency of 77.3% for a flame speed of 0.65 m/s. (author)

Pastore, A.; Mastorakos, E. [Department of Engineering, University of Cambridge, Cambridge CB2 1PZ (United Kingdom)

2010-04-15T23:59:59.000Z

459

Liquid metal thermal electric converter  

DOE Patents (OSTI)

A liquid metal thermal electric converter which converts heat energy to electrical energy. The design of the liquid metal thermal electric converter incorporates a unique configuration which directs the metal fluid pressure to the outside of the tube which results in the structural loads in the tube to be compressive. A liquid metal thermal electric converter refluxing boiler with series connection of tubes and a multiple cell liquid metal thermal electric converter are also provided.

Abbin, Joseph P. (Albuquerque, NM); Andraka, Charles E. (Albuquerque, NM); Lukens, Laurance L. (Albuquerque, NM); Moreno, James B. (Albuquerque, NM)

1989-01-01T23:59:59.000Z

460

Liquid crystalline composites containing phyllosilicates  

DOE Patents (OSTI)

The present invention provides barrier films having reduced gas permeability for use in packaging and coating applications. The barrier films comprise an anisotropic liquid crystalline composite layer formed from phyllosilicate-polymer compositions. Phyllosilicate-polymer liquid crystalline compositions of the present invention can contain a high percentage of phyllosilicate while remaining transparent. Because of the ordering of the particles in the liquid crystalline composite, barrier films comprising liquid crystalline composites are particularly useful as barriers to gas transport.

Chaiko; David J. (Naperville, IL)

2007-05-08T23:59:59.000Z

Note: This page contains sample records for the topic "liquid porous interfaces" 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

Latent heat fluxes through nano-engineered porous materials  

E-Print Network (OSTI)

Micro- and nano-scale truss architectures provide mechanical strength, light weight, and breatheability in polymer barriers. Liquid evaporation and transport of resulting vapor through truss voids (pores) cools surfaces ...

Traum, Matthew J. (Matthew Jason), 1977-

2007-01-01T23:59:59.000Z

462

Viscous Fingering and Gravity Segregation through Porous Media: Experimental Findings  

Science Conference Proceedings (OSTI)

During downward vertical flow of a viscous solution, the viscous fingering (VF) phenomenon affects miscible displacement of solutes through a soil profile. On the other hand, during horizontal flow, when the liquid residing in a horizontal bed of ...

Farhat Abbas; Derek A. Rose

2010-10-01T23:59:59.000Z

463

Tassel Pipeline Tutorial (Command Line Interface)  

E-Print Network (OSTI)

Tassel Pipeline Tutorial (Command Line Interface) Terry Casstevens Institute for Genomic Diversity, Cornell University May 11, 2011 #12;Tassel Pipeline Basics... · Consists of Modules (i.e. Plugins) · Output from one Module can be Input to another Module. Determined by order specified. run_pipeline

Buckler, Edward S.

464

Spatial user interface for experiencing Mogao caves  

Science Conference Proceedings (OSTI)

In this paper, we describe the design and implementation of the Pure Land AR, which is an installation that employs spatial user interface and allows users to virtually visit the UNESCO world heritage -- Mogao Caves by using handheld devices. The installation ... Keywords: augmented reality, heritage preservation, virtual reality

Leith Kin Yip Chan; Sarah Kenderdine; Jeffrey Shaw

2013-07-01T23:59:59.000Z

465

Sustainability and Performance at Interface, Inc.  

Science Conference Proceedings (OSTI)

Interface, Inc., the world's leader in commercial carpet tile, also manufactures and sells 12-foot broadloom carpet, interior fabrics, access flooring, cushion backing, and specialty chemicals. The company has made a strategic commitment to sustainability ... Keywords: Environment, Organizational studies-- motivation--incentives

Jennifer R. DuBose

2000-05-01T23:59:59.000Z

466

Participatory design for exertion interfaces for children  

Science Conference Proceedings (OSTI)

We propose an adaptation of Participatory Design (PD) specifically conceived for full-body interaction design addressing the specificities that this entails. The idea is to include the preferences and points of view of children in the process of designing ... Keywords: Wizard of Oz, children, exertion interfaces, full-body interaction, interaction design, participatory design, physical activity

Pascal Landry; Narcís Parés; Joseph Minsky; Roc Parés

2012-06-01T23:59:59.000Z

467

Creating creativity: user interfaces for supporting innovation  

Science Conference Proceedings (OSTI)

A challenge for human-computer interaction researchers and user interf ace designers is to construct information technologies that support creativity. This ambitious goal can be attained by building on an adequate understanding of creative processes. ... Keywords: creativity support tools, direct manipulation, graphical user interfaces, human-computer interaction, information visualization

Ben Shneiderman

2000-03-01T23:59:59.000Z

468

Brain---computer interfaces for space applications  

Science Conference Proceedings (OSTI)

Recent experiments have shown the possibility to use the brain electrical activity to directly control the movement of robots. Such a kind of brain---computer interface is a natural way to augment human capabilities by providing a new interaction link ... Keywords: Astronauts, BCI, Space operations

Cristina Negueruela; Michael Broschart; Carlo Menon; José R. Millán

2011-06-01T23:59:59.000Z

469

More than an interface: scsi vs. ata  

Science Conference Proceedings (OSTI)

This paper sets out to clear up a misconception prominent in the storage community today, that SCSI disc drives and IDE (ATA) disc drives are the same technology internally, and differ only in their external interface and in their suggested retail price. ...

Dave Anderson; Jim Dykes; Erik Riedel

2003-03-01T23:59:59.000Z

470

Combined electrophoresis-electrospray interface and method  

DOE Patents (OSTI)

An improvement to the system and method for analyzing molecular constituents of a composition sample that comprises improvements to an electrospray ionization source for interfacing to mass spectrometers and other detection devices. The improvement consists of establishing a unique electrical circuit pattern and nozzle configuration, a metallic coated and conical shaped capillary outlet, coupled with sizing of the capillary to obtain maximum sensitivity.

Smith, Richard D. (Richland, WA); Udseth, Harold R. (Richland, WA); Barinaga, Charles J. (Richland, WA)

1995-01-01T23:59:59.000Z

471

CHIMIE DE COORDINATION INTERFACES ET PROCEDES  

E-Print Network (OSTI)

.; Nielsen, R. Gas purification 1997, Gulf Publishing. 2. Balat, M. Production of bioethanol from lignocellulosic materials via the biochemical pathway: A review Energy Conversion and Management 2011, 52 (2), 858, Faible conversion Interface interne C A B B B Conversion totale A tel-00785650,version1-6Feb2013 #12

van Tiggelen, Bart

472

Improving Automatic Interface Generation with Smart Templates  

E-Print Network (OSTI)

Improving Automatic Interface Generation with Smart Templates Jeffrey Nichols, Brad A. Myers 1. Arrangements of media playback controls gener- ated automatically from the media-control Smart differently. Smart Templates is a technique that uses parameterized templates in the appliance model

Myers, Brad A.

473

High temperature liquid level sensor  

DOE Patents (OSTI)

A length of metal sheathed metal oxide cable is perforated to permit liquid access to the insulation about a pair of conductors spaced close to one another. Changes in resistance across the conductors will be a function of liquid level, since the wetted insulation will have greater electrical conductivity than that of the dry insulation above the liquid elevation.

Tokarz, Richard D. (West Richland, WA)

1983-01-01T23:59:59.000Z

474

Molecular simulation of biomaterials and biomolecules at the solid-liquid interface  

E-Print Network (OSTI)

Biomaterials and biomineralization have been successfully utilized in a broad variety of technical applications. Properties of natural biopolymers, such as the ability to control the nucleation, growth, and organization ...

Kottmann, Stephen Thomas

2008-01-01T23:59:59.000Z

475

Simultaneous heat and mass transfer to a liquid through two separated interfaces.  

E-Print Network (OSTI)

??The oxygenator is the main element of a heart-lung machine, which takes over the work of the lungs (adding oxygen to and removing carbon dioxide… (more)

Park, Ku-il

2004-01-01T23:59:59.000Z

476

X-ray scattering studies of structure and dynamics of surfaces and interfaces of polymeric liquids  

E-Print Network (OSTI)

8-ID at the Advanced Photon Source (APS), Argonne National8-ID-I at the Advanced Photon Source (APS), Argonne National

Jiang, Zhang

2007-01-01T23:59:59.000Z

477

The requirements for processing tritium recovered from liquid lithium blankets: The blanket interface  

Science Conference Proceedings (OSTI)

We have initiated a study to define a blanket processing mockup for Tritium Systems Test Assembly. Initial evaluation of the requirements of the blanket processing system have been started. The first step of the work is to define the condition of the gaseous tritium stream from the blanket tritium recovery system. This report summarizes this part of the work for one particular blanket concept, i.e., a self-cooled lithium blanket. The total gas throughput, the hydrogen to tritium ratio, the corrosive chemicals, and the radionuclides are defined. The key discoveries are: the throughput of the blanket gas stream (including the helium carrier gas) is about two orders of magnitude higher than the plasma exhaust stream;the protium to tritium ratio is about 1, the deuterium to tritium ratio is about 0.003;the corrosion chemicals are dominated by halides;the radionuclides are dominated by C-14, P-32, and S-35;their is high level of nitrogen contamination in the blanket stream. 77 refs., 6 figs., 13 tabs.

Clemmer, R.G.; Finn, P.A.; Greenwood, L.R.; Grimm, T.L.; Sze, D.K.; Bartlit, J.R.; Anderson, J.L.; Yoshida, H.; Naruse

1988-03-01T23:59:59.000Z

478

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen and  

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

Freeze the Rainbow! Freeze the Rainbow! Previous Video (Freeze the Rainbow!) Frostbite Theater Main Index Next Video (Liquid Nitrogen and Fire!) Liquid Nitrogen and Fire! Liquid Nitrogen and Antifreeze! What happens when the freezing power of liquid nitrogen meets the antifreezing power of ethylene glycol? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: What happens when the freezing power of liquid nitrogen... Steve: ...meets the antifreezing power of ethylene glycol! Joanna: While a mix of 70 percent ethylene glycol and 30 percent water doesn't freeze until 60 degrees below zero, it's still no match for liquid nitrogen. At 321 degrees below zero, liquid nitrogen easily freezes

479

Frostbite Theater - Liquid Nitrogen Experiments - Let's Freeze Liquid  

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

Shattering Pennies! Shattering Pennies! Previous Video (Shattering Pennies!) Frostbite Theater Main Index Next Video (Liquid Nitrogen in a Microwave!) Liquid Nitrogen in a Microwave! Let's Freeze Liquid Nitrogen! By removing the hottest molecules, we're able to freeze liquid nitrogen! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Today, we're going to freeze liquid nitrogen! Joanna and Steve: Yeah! Joanna: The obvious way to do this is to put the liquid nitrogen into something colder. Something that we have lots of around here! Something like... liquid helium! Steve: Yes! Joanna: Yeah, but we're not going to do that. Instead, we're going to freeze the nitrogen by removing the hottest molecules!

480

Method and apparatus for electrokinetic co-generation of hydrogen and electric power from liquid water microjets  

SciTech Connect

A method and apparatus for producing both a gas and electrical power from a flowing liquid, the method comprising: a) providing a source liquid containing ions that when neutralized form a gas; b) providing a velocity to the source liquid relative to a solid material to form a charged liquid microjet, which subsequently breaks up into a droplet spay, the solid material forming a liquid-solid interface; and c) supplying electrons to the charged liquid by contacting a spray stream of the charged liquid with an electron source. In one embodiment, where the liquid is water, hydrogen gas is formed and a streaming current is generated. The apparatus comprises a source of pressurized liquid, a microjet nozzle, a conduit for delivering said liquid to said microjet nozzle, and a conductive metal target sufficiently spaced from said nozzle such that the jet stream produced by said microjet is discontinuous at said target. In one arrangement, with the metal nozzle and target electrically connected to ground, both hydrogen gas and a streaming current are generated at the target as it is impinged by the streaming, liquid spray microjet.

Saykally, Richard J; Duffin, Andrew M; Wilson, Kevin R; Rude, Bruce S

2013-02-12T23:59:59.000Z

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481

Liquid Metal Processing and Casting 2013  

Science Conference Proceedings (OSTI)

Ceramic, Slag and Refractory Reactions with Liquid Metals - Refining, Evaporation and Gas/Metal Reactions - Fundamentals of Reactions involving Liquid ...

482

Available Technologies: Sugar Extraction and Ionic Liquid ...  

APPLICATIONS OF TECHNOLOGY: Biomass pretreatment for biofuel production; Recovery of products using biphasic liquid-liquid extraction; Recovery and ...

483

Liquid fossil fuel technology  

Science Conference Proceedings (OSTI)

Progress reports are presented under the following headings: (1) extraction (technology assessment, oil research, gas research); (2) liquid processing (characterization, thermodynamics, processing technology); (3) utilization (energy conservation); and (4) project integration and technology transfer. BETC publications are also listed. Some of the highlights for this period are: the Bartlesville Energy Technology Center was converted into NIPER, the National Institute for Petroleum and Energy Research on October 1, 1983; modelling of enthalpies, heat capacities and volumes of aqueous surfactant solutions began using a mass action model; a series of experiments were run on upgrading by hydrogenation SRC-II coal liquid at different degrees of severity and the products have been analyzed; heavy crude oil extracts were separated into fraction with high performance liquid chromatography by Lawrence Berkeley Laboratory and the mass spectra and electron spin resonance were determin ed; and particulates from exhaust gases of diesel engines using fire fuel types are being collected and will be analyzed by chemical methods and results will be compared with those obtained by biological assay. (ATT)

Not Available

1983-01-01T23:59:59.000Z

484

Interfacial instability induced by lateral vapor pressure fluctuation in bounded thin liquid-vapor layers  

E-Print Network (OSTI)

We study an instability of thin liquid-vapor layers bounded by rigid parallel walls from both below and above. In this system, the interfacial instability is induced by lateral vapor pressure fluctuation, which is in turn attributed to the effect of phase change: evaporation occurs at the hotter portion of the interface and condensation at the colder one. The high vapor pressure drives the liquid away and the low one pulls it up. A set of equations describing the temporal evolution of the interface of the liquid-vapor layers is derived. This model neglects the effect of mass loss or gain at the interface and guarantees the mass conservation of the liquid layer. The result of linear stability analysis of the model shows that the presence of the pressure dependence of the local saturation temperature suppresses the growth of long-wave disturbances. We find the stability criterion, which suggests that only slight temperature gradients are sufficient to overcome the stabilizing gravitational effect for a water an...

Kanatani, Kentaro

2008-01-01T23:59:59.000Z

485

Gravity currents in a porous medium at an inclined plane  

E-Print Network (OSTI)

We consider the release from a point source of relatively heavy fluid into a porous saturated medium above an impermeable slope. We consider the case where the volume of the resulting gravity current increases with time like $t^\\alpha$ and show that for $\\alpha3$, this situation is reversed with spreading occurring predominantly downslope for short times. The governing equations admit similarity solutions whose scaling behaviour we determine, with the full similarity form being evaluated by numerical computations of the governing partial differential equation. We find that the results of these analyses are in good quantitative agreement with a series of laboratory experiments. Finally, we briefly discuss the implications of our work for the sequestration of carbon dioxide in aquifers with a sloping, impermeable cap.

Vella, D; Huppert, Herbert E.; Vella, Dominic

2006-01-01T23:59:59.000Z

486

Fuel cell with interdigitated porous flow-field  

DOE Patents (OSTI)

A polymer electrolyte membrane (PEM) fuel cell is formed with an improved system for distributing gaseous reactants to the membrane surface. A PEM fuel cell has an ionic transport membrane with opposed catalytic surfaces formed thereon and separates gaseous reactants that undergo reactions at the catalytic surfaces of the membrane. The fuel cell may also include a thin gas diffusion layer having first and second sides with a first side contacting at least one of the catalytic surfaces. A macroporous flow-field with interdigitated inlet and outlet reactant channels contacts the second side of the thin gas diffusion layer for distributing one of the gaseous reactants over the thin gas diffusion layer for transport to an adjacent one of the catalytic surfaces of the membrane. The porous flow field may be formed from a hydrophilic material and provides uniform support across the backside of the electrode assembly to facilitate the use of thin backing layers.

Wilson, Mahlon S. (Los Alamos, NM)

1997-01-01T23:59:59.000Z

487

Cracking Condition of Cohesionless Porous Materials in Drying Processes  

E-Print Network (OSTI)

The invasion of air into porous systems in drying processes is often localized in soft materials, such as colloidal suspensions and granular pastes, and it typically develops in the form of cracks before ordinary drying begins. To investigate such processes, we construct an invasion percolation model on a deformable lattice for cohesionless elastic systems, and with this model we derive the condition under which cracking occurs. A Griffith-like condition characterized by a dimensionless parameter is proposed, and its validity is checked numerically. This condition indicates that the ease with which cracking occurs increases as the particles composing the material become smaller, as the rigidity of the system increases, and as the degree of heterogeneity characterizing the drying processes decreases.

So Kitsunezaki

2013-01-15T23:59:59.000Z

488

On the transport of emulsions in porous media  

Science Conference Proceedings (OSTI)

Emulsions appear in many subsurface applications includingbioremediation, surfactant-enhanced remediation, and enhancedoil-recovery. Modeling emulsion transport in porous media is particularlychallenging because the rheological and physical properties of emulsionsare different from averages of the components. Current modelingapproaches are based on filtration theories, which are not suited toadequately address the pore-scale permeability fluctuations and reductionof absolute permeability that are often encountered during emulsiontransport. In this communication, we introduce a continuous time randomwalk based alternative approach that captures these unique features ofemulsion transport. Calculations based on the proposed approach resultedin excellent match with experimental observations of emulsionbreakthrough from the literature. Specifically, the new approach explainsthe slow late-time tailing behavior that could not be fitted using thestandard approach. The theory presented in this paper also provides animportant stepping stone toward a generalizedself-consistent modeling ofmultiphase flow.

Cortis, Andrea; Ghezzehei, Teamrat A.

2007-06-27T23:59:59.000Z

489

6.831 User Interface Design and Implementation, Fall 2004  

E-Print Network (OSTI)

6.831 introduces the principles of user interface development, focusing on three key areas: Design: How to design good user interfaces, starting with human capabilities (including the human information processor model, ...

Miller, Robert

490

Discrete multi-material interface reconstruction for volume fraction data  

Science Conference Proceedings (OSTI)

Material interface reconstruction (MIR) is the task of constructing boundary interfaces between regions of homogeneous material, while satisfying volume constraints, over a structured or unstructured spatial domain. In this paper, we present a discrete ...

J. C. Anderson; C. Garth; M. A. Duchaineau; K. I. Joy

2008-05-01T23:59:59.000Z

491

Experimental investigations of solid-solid thermal interface conductance  

E-Print Network (OSTI)

Understanding thermal interface conductance is important for nanoscale systems where interfaces can play a critical role in heat transport. In this thesis, pump and probe transient thermoreflectance methods are used to ...

Collins, Kimberlee C. (Kimberlee Chiyoko)

2010-01-01T23:59:59.000Z

492

Reflective Interfaces : assisting teens with stressful situations online  

E-Print Network (OSTI)

This thesis presents the concept of Reflective Interfaces, a novel approach to user experience design that promotes positive behavioral norms. Traditional interface design methodologies such as User Centered Design are ...

Jones, Birago (Birago Korayga)

2012-01-01T23:59:59.000Z

493

The ATM Forum‘s private network/network interface  

Science Conference Proceedings (OSTI)

The ATM Forum completed the first version of its private network/network interface (PNNI) in March 1996 and many ATM switch manufacturers are now offering early implementations. PNNI offers a different type of internetwork or internodal interface from ...

J. M. Scott; I. G. Jones

1998-04-01T23:59:59.000Z

494

Multimodal speech interfaces for map-based applications  

E-Print Network (OSTI)

This thesis presents the development of multimodal speech interfaces for mobile and vehicle systems. Multimodal interfaces have been shown to increase input efficiency in comparison with their purely speech or text-based ...

Liu, Sean (Sean Y.)

2010-01-01T23:59:59.000Z

495

Incorporating Quality-of-Service in the Virtual Interface Architecture  

Science Conference Proceedings (OSTI)

User-level Networking (ULN) is gaining rapid acceptance in the commercial world with Virtual Interface Architecture (VIA), and Infiniband more recently, being touted as the interface of choice to diverse peripherals. There is an important issue with ...

Shailabh Nagar; Chun Liu; Gokul B. Kandiraju; Anand Sivasubramaniam; N. Gautam

2002-04-01T23:59:59.000Z

496

2002 DOE/DNFSB Interface Workshop - Participants  

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

DOE/DNFSB Interface Workshop DOE/DNFSB Interface Workshop PARTICIPANTS Amerine, Dave CH2M HILL Hanford Group, Hanford P. O. Box 1500 MSIN: H6-63 Richland, WA 99352 509-376-5107 509-372-1664 (Fax) David_B_Amerine@rl.gov Bailey, Nolan Board Point of Conact, Nevada Operations Office 232 Energy Way North Las Vegas, NA 89030 702-295-4601 702-295-2261 (Fax) bailey@nv.doe.gov Bartlett, William Carlsbad Technical Assistance Contractor, WIPP 4021 National Parks Hwy Carlsbad, NM 88220 505-234-7160 505-234-7198 (Fax) bill.bartlett@wipp.ws Beck, Dave NNSA Assistant Deputy Administrator for Military Application and Stockpile Operations, NA-12 1000 Independence Ave Washington, DC 20585 202-586-4879 Black, Dick Director, EH Office of Nuclear and Facility Safety Policy, EH-53 1000 Independence Ave

497

Nuclear fuels accounting interface: River Bend experience  

SciTech Connect

This presentation describes nuclear fuel accounting activities from the perspective of nuclear fuels management and its interfaces. Generally, Nuclear Fuels-River Bend Nuclear Group (RBNG) is involved on a day-by-day basis with nuclear fuel materials accounting in carrying out is procurement, contract administration, processing, and inventory management duties, including those associated with its special nuclear materials (SNM)-isotopics accountability oversight responsibilities as the Central Accountability Office for the River Bend Station. As much as possible, these duties are carried out in an integrated, interdependent manner. From these primary functions devolve Nuclear Fuels interfacing activities with fuel cost and tax accounting. Noting that nuclear fuel tax accounting support is of both an esoteric and intermittent nature, Nuclear Fuels-RBNG support of developments and applications associated with nuclear fuel cost accounting is stressed in this presentation.

Barry, J.E.

1986-01-01T23:59:59.000Z

498

Low Frequency Acoustic Resonance Studies of the Liquid-Vapor Transition in Silica Aerogel  

E-Print Network (OSTI)

Fluid phase transitions in porous media are a powerful probe of the effect of confinement and disorder on phase transitions. Aerogel may provide a model system in which to study the effect of dilute impurities on a variety of phase transitions. In this paper we present a series of low frequency acoustic experiments on the effect of aerogel on the liquid-vapor phase transition. Acoustic resonators were used to study the liquid-vapor transition in two fluids (helium and neon) and in two different porosity aerogels (95% and 98%). While effective coexistence curves could be mapped out, the transition was sometimes difficult to pinpoint, leading to doubt as to whether this t