Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 80 for “"Transport modeling"”.
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Flow-Transport Modeling and Quantification
… have been conducted on the flow and sediment transport over bed forms in alluvial rivers (e.g. mean flow field, turbulence, shear partitioning, bed load transport and bed form geometry). Much of this work was either laboratory studies or small scale field investigations. Recently, advance in …
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Hydrogen radiation transport modeling in ALCATOR C-Mod
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1999.
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Oral Drug Delivery -- Molecular Design and Transport Modeling
… validation processes involved. A computational modeling approach, which could explore the design space rapidly, reduce uncertainty and make better, faster and safer decisions, fits into the overall goal and complements the product development process. Our research focuses on the early …
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Hydrodynamic and sediment transport modeling of deltaic sediment processes
… and distributary channel formation and sediment transport on an adverse slope could be simulated with a 2D finite element sediment transport model. The models used were RMA2 and SED2D modules of the TABS-MD model suite. A finite element mesh of the lower Atchafalaya River and the delta was …
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High-energy photon transport modeling for oil-well logging
… techniques. The properties of high-energy photon transport are investigated for potential new or improved well logging measurements. Two obvious processes available with a high-energy photon source are pair production and photo neutron emission. A new measurement of formation density is proposed …
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Flow and reactive transport modeling at the stream-groundwater interface
… For this purpose, a three-dimensional numerical modeling approach for coupling stream water flow with porous media flow is used. Multiple steady state stream water flow scenarios over different generic pool-riffle morphologies and a natural in-stream gravel bar are simulated by a computational …
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Application of the complex step method to chemistry-transport modeling
Sensitivity analysis in atmospheric chemistry-transport modeling is used to develop understanding of the mechanisms by which emissions affect atmospheric chemistry and composition, to quantify the marginal impact of emissions on air quality, and for other applications including improving estimates …
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Actuation and Charge Transport Modeling of Ionic Liquid-Ionic Polymer Transducers
… showing an excellent fit to the data. Charge transport is modeled by considering both the cation and anion of the ionic liquid as mobile charge carriers, a phenomenon which is unique to ionic liquid IPTs as compared to their water-based counterparts. Numerical simulations are performed using …
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Design and application of flux corrected transport for reactive solute transport modeling
Understanding reactive solute transport, which couples flow , transport, and chemical/ biological reaction in porous media, is important in areas such as aquifer remediation, groundwater contamination and geochemical reaction modeling. Due to the large time scales involved, lack of accessibility to …
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Utilization of soft data for uncertainty reduction in groundwater flow and transport modeling
Includes bibliographical references (pages 237-247).
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Quantifying the impacts of exogenous dust inputs to watersheds using reactive transport modeling
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Continuum breakdown assessment and state-based transport modeling for non-equilibrium hypersonic flows
… both methodologies. Improving the kinetics and transport models used in these solution techniques as well as developing accurate reduced order frameworks allow for reliable yet efficient estimation of flowfield parameters, thus optimizing thermal protection system (TPS) design. Informed by these …
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Improving microbial fate and transport modeling to support TMDL development in an urban watershed
… to limited understanding of microbial fate and transport, predictions of FIB concentrations are associated with considerable uncertainty relative to other water-quality contaminants. By focusing on a data-rich instrumented urban watershed, this study aims to improve understanding of microbial …
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Three-Dimensional Numerical Modeling Of Multiple-Sized Sediment Transport Modeling Under Current And Waves
… numerical model of multiple-sized sediment transport under current and waves is developed. The coastal circulations are described by a three-dimensional hydrodynamic model, which is governed by the three-dimensional phase-averaged shallow water flow equations coupled with wave radiation …
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Transport modeling of simple fluids and nano-colloids : thermal conduction mechanisms and coarse projection
In the first part of this thesis, the modes of microscopic energy fluctuations governing heat flow in nano-colloids are quantitatively assessed by combining linear response theory with molecular dynamics (MD) simulations. The intrinsic thermal conductivity is decomposed into self and cross …
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Analytical Modeling of Bentonite Swelling and Numerical Reactive Transport Modeling in Nuclear Waste Disposal Systems
… and high plasticity, which can restrict the transport of nuclear waste through the barrier and maintain the sealing ability of barrier even with the deformation of bentonite, respectively. Montmorillonite is considered as the primary constituent of bentonite, which is a major expandable …
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The Development and Application of Reactive Transport Modeling Techniques to Study Radionuclide Migration at Yucca Mountain, Nevada
… intensive. We have developed two reactive transport modeling techniques to simulate radionuclide transport at Yucca Mountain: (1) the selective coupling approach applied to the convection-dispersion-reaction (CDR) model and (2) a reactive streamtube approach (RST). These models were …
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Surface spills at unconventional oil and gas sites: a contaminant transport modeling study for the South Platte alluvial aquifer
… impact groundwater. Here, I present fate and transport simulations of aqueous fluid surface spills, the most likely pathway for groundwater contamination during oil and gas production operations, with four primary goals: (1) to evaluate whether or not these spills pose risks to groundwater …
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Multi-scale particle transport modeling: Kinetic high-fidelity DSMC approaches and system-scale Eulerian-Lagrangian simulations for high-speed flows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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