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OS3D/GIMRT software for modeling multicomponent-multidimensional reactive transport

Description: OS3D/GIMRT is a numerical software package for simulating multicomponent reactive transport in porous media. The package consists of two principal components: (1) the code OS3D (Operator Splitting 3-Dimensional Reactive Transport) which simulates reactive transport by either splitting the reaction and transport steps in time, i.e., the classic time or operator splitting approach, or by iterating sequentially between reactions and transport, and (2) the code GIMRT (Global Implicit Multicomponent… more
Date: May 17, 2000
Creator: Steefel, CI & Yabusaki, SB
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A 2-D Pore-Network Model of the Drying of Single-Component Liquids in Porous Media

Description: The drying of liquid-saturated porous media is typically approaching using macroscopic continuum models involving phenomenological coefficients. Insight on these coefficients can be obtained by a more fundamental study at the pore- and pore-network levels. In this report, a model based on pore-network representation of porous media that accounts for various process at the pore-scale is presented. These include mass transfer by advection and diffusion in the gas phase, viscous flow in liquid and… more
Date: January 20, 2000
Creator: Yortsos, Yanic C.; Yiotis, A. G.; Stubos, A. K. & Boundovis, A. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mechanisms of Pyrite Oxidation to Non-Slagging Species. Quarterly Report, January 1, 1995--March 31, 1995

Description: This document is the third quarterly status report on a project conducted at the High Temperature Gasdynamics Laboratory at Stanford University, Stanford, California and concerned with enhancing the transformation of iron pyrite to non-slagging species during staged, low-NO{sub x} pulverized coal (P.C.) combustion. The research project is intended to advance PETC`s efforts to improve our technical understanding of the high-temperature chemical and physical processes involved in the utilization … more
Date: August 1, 1995
Creator: Akan-Etuk, A. E. J. & Mitchell, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Multi-Scale Mass Transfer Processes Controlling Natural Attenuation and Engineered Remediation: An IFC Focused on Hanford’s 300 Area Uranium Plume Quality Assurance Project Plan

Description: The purpose of the project is to conduct research at an Integrated Field-Scale Research Challenge Site in the Hanford Site 300 Area, CERCLA OU 300-FF-5 (Figure 1), to investigate multi-scale mass transfer processes associated with a subsurface uranium plume impacting both the vadose zone and groundwater. The project will investigate a series of science questions posed for research related to the effect of spatial heterogeneities, the importance of scale, coupled interactions between biogeochemi… more
Date: January 31, 2008
Creator: Fix, N. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of electric fields on mass transfer to droplets. Final report

Description: During the six year funding period, the effects of a direct and alternating field upon single drop hydrodynamics and mass transfer were evaluated both experimentally and theoretically. Direct current field effects upon drop size, velocity and mass transfer rates were also observed for multiple drops formed in a three stage sieve tray column. Drop size, velocity, and mass transfer rates were measured experimentally and compared to simple models for direct current electric fields. Agreement betwe… more
Date: February 1, 1994
Creator: Carleson, T. E. & Budwig, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interfacial Area and Interfacial Transfer in Two-Phase Flow Systems (Volume I. Chapters 1-5)

Description: Experiments were performed on horizontal air-water bubbly two-phase flow, axial flow, stratified wavy flow, and annular flow. Theoretical studies were also undertaken on interfacial parameters for a horizontal two-phase flow.
Date: March 15, 2003
Creator: Guo, T.; Park, J. & Kojasoy, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interfacial Area and Interfacial Transfer in Two-Phase Flow Systems (Volume IV. Chapters 15-19)

Description: Experiments were performed on horizontal air-water bubbly two-phase flow, axial flow, stratified wavy flow, and annular flow. Theoretical studies were also undertaken on interfacial parameters for a horizontal two-phase flow.
Date: March 15, 2003
Creator: Guo, T.; Park, J. & Kojasoy, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interfacial Area and Interfacial Transfer in Two-Phase Flow Systems (Volume III. Chapters 11-14)

Description: Experiments were performed on horizontal air-water bubbly two-phase flow, axial flow, stratified wavy flow, and annular flow. Theoretical studies were also undertaken on interfacial parameters for a horizontal two-phase flow.
Date: March 15, 2003
Creator: Guo, T.; Park, J. & Kojasoy, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat Transfer Enhancement in Separated and Vortex Flows

Description: This document summarizes the research performance done at the Heat Transfer Laboratory of the University of Minnesota on heat transfer and energy separation in separated and vortex flow supported by DOE in the period September 1, 1998--August 31, 2003. Unsteady and complicated flow structures in separated or vortex flows are the main reason for a poor understanding of heat transfer under such conditions. The research from the University of Minnesota focused on the following important aspects of… more
Date: May 27, 2004
Creator: Goldstein, Richard J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of U(VI) Sorption-Desorption Processes and Model Upscaling

Description: The objectives of the overall collaborative EMSP effort (with which this project is associated) are to characterize sorption and desorption processes of U(VI) on pristine and contaminated Hanford sediments over a range of sediment facies and materials properties and to relate such characterization both to fundamental molecular-scale understanding and fieldscale models of geochemistry and mass transfer. The research is intended to provide new insights on the mechanisms of U(VI) retardation at Ha… more
Date: June 14, 2004
Creator: Zachara, John M.; Brown, Gordon, E.; Lichtner, Peter C. & Ball, William
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PARTICLE TRANSPORT AND DEPOSITION IN THE HOT-GAS FILTER AT WILSONVILLE

Description: Particle transport and deposition in the Wilsonville hot-gas filter vessel is studied. The filter vessel contains a total of 72 filters, which are arranged in two tiers. These are modeled by six upper and one lower cylindrical effective filters. An unstructured grid of 312,797 cells generated by GAMBIT is used in the simulations. The Reynolds stress model of FLUENT{trademark} (version 5.0) code is used for evaluating the gas mean velocities and root mean-square fluctuation velocities in the ves… more
Date: June 24, 1999
Creator: Ahmadi, Goodarz
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interfacial Area and Interfacial Transfer in Two-Phase Flow Systems (Volume II. Chapters 6-10)

Description: Experiments were performed on horizontal air-water bubbly two-phase flow, axial flow, stratified wavy flow, and annular flow. Theoretical studies were also undertaken on interfacial parameters for a horizontal two-phase flow.
Date: March 15, 2003
Creator: Guo, T.; Park, J. & Kojasoy, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Relocation of the Donner Library collection

Description: The Donner Library vacated its location from 2nd floor of the Donner Building located on the U.C. Berkeley campus to the 2nd floor of the Building 50 complex at Lawrence Berkeley National Laboratory. The report discusses solutions, options and methods for relocating the Donner Library Collection.
Date: October 13, 2005
Creator: LaBrie, Rita Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mathematical model of a NiOOH/metal hydride cell. Final report, September 15, 1993--November 14, 1996

Description: One of the objectives of work on the nickel/metal hydride cell has been to develop a mathematical model of the performance of the cell. This is a summary of work to date and is meant to be a Final Report of the BES project. Mathematical model of the nickel/metal hydride cell depends on the kinetics, thermodynamics, and transport properties of the metal hydride electrode. Consequently, investigations were carried out to determine: (1) the exchange current density and the equilibrium potential as… more
Date: December 31, 1996
Creator: White, R.E. & Popov, B.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solar structure: Models and inferences from helioseismology

Description: In this review the author summarizes results published during approximately the least three years concerning the state of one-dimensional solar interior modeling. She discusses the effects of refinements to the input physics, motivated by improving the agreement between calculated and observed solar oscillation frequencies, or between calculated and inferred solar structure. She has omitted two- and three-dimensional aspects of the solar structure, such as the rotation profile, detailed modelin… more
Date: December 31, 1998
Creator: Guzik, J.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Removal of heteroatoms and metals from crude oils by bioconversion processes

Description: The objective of this Cooperative research and Development Agreement project between Oak Ridge National Laboratory (ORNL) and Baker Performance Chemicals (BPC), Chevron, Energy BioSystems, Exxon, UNOCAL and Texaco is to investigate the biological desulfurization of crude oil. Biological removal of organic sulfur from crude oil offers an attractive alternative to conventional thermochemical treatment due to the mild operating conditions afforded by the biocatalyst. In order for biodesulfurizatio… more
Date: October 1, 1997
Creator: Kaufman, E. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Deriving the structure of pre-supernovae and delta Scuti stars using nonradial oscillations

Description: This is the final report of a three-year Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective is to learn more about the internal structure of two classes of variable stars, by using the observational data afforded by their pulsation properties. The authors updated the one-dimensional computer codes to calculate the evolution and pulsation frequencies of representative delta Scuti and LBV models. They compared the observed pulsa… more
Date: November 1, 1998
Creator: Guzik, Joyce A.; Bradley, Paul A.; Cox, Arthur N.; Swenson, Fritz J.; Deupree, Robert G.; Soukup, Michael S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Band spreading in two-dimensional microchannel turns for electrophoretic or electroosmotic species transport

Description: Analytical and numerical methods are employed to investigate species transport by electrophoretic or electroosmotic motion in the curved geometry of a two-dimensional turn. Closed-form analytical solutions describing the turn-induced diffusive and dispersive spreading of a species band are presented for both the low and high Peclet number limits. The authors find that the spreading due to dispersion is proportional to the product of the turn included angle and the Peclet number at low Peclet nu… more
Date: March 1, 2000
Creator: Griffiths, S. K. & Nilson, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Roll Waves on the Hydrodynamics of Falling Films Observed in Vertical Column Absorbers

Description: A thin falling film is well suited to simultaneous heat and mass transfer because of the small thermal resistance through the film and because of the large contact surface achievable at low flow rates. The film enters as a smooth laminar flow and quickly transitions into small-amplitude wavy flow. The waves grown in length and amplitude and are identified as roll waves. This flow regime is termed wavy-laminar flow, and modern heat and mass transfer equipment operate in this complicated transiti… more
Date: June 28, 2001
Creator: Miller, W.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Impurity transport studies of intrinsic Mo and injected Ge in high temperature ECRH heated FTU tokamak plasmas

Description: FTU plasmas reached a peak electron temperature up to 11 keV with ECRH heating during the current ramp up phase. For these plasmas X-ray emission of highly ionized molybdenum, the dominant intrinsic impurity, are presented in section II, and VUV spectra of injected germanium are presented in section III. In section IV the conclusions are discussed.
Date: June 1, 1999
Creator: Bracco, F.; Crisanti, M.; Finkenthal, M.; Fournier, K.; Gabellieri, G.; Granucci, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Data quality objectives for TWRS privatization, phase 1: Tank waste transfer control

Description: The Phase 1 privatization contracts (DOE-M 1996) require that the Project Hanford Management Contractors, on behalf of the US Department of Energy, Richland Operations Office, deliver the appropriate quantities of the proper composition of feed on schedule. The Feed Process Management Team (FPMT) was created with responsibility for establishing requirements, identifying and recommending baseline change control, assuring correlation management of tank contents (e.g., feed pedigrees), and requiri… more
Date: August 4, 1998
Creator: Banning, D.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Effective Continuum Model for the Liquid-to-Gas Phase Change in a Porous Medium Driven by Solute Diffusion: I. Constant Pressure Decline Rates

Description: This report, focuses on the isothermal gas phase growth from a supersaturated, slightly compressible, binary liquid in a porous medium. This is driven by mass transfer, the extent of which is controlled by the application of either a constant-rate decline of the system pressure or the withdrawal of the liquid at a constant rate. This report deals with the first process. Pressure depletion due to constant-rate liquid withdrawal is analyzed in a companion report .
Date: August 15, 2001
Creator: Tsimpanogiannis, Ioannis N. & Yortsos, Yanis C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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