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 136 for “"Solute Transport"”.
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Solute transport in layered and heterogeneous soils
Better understanding of transport of dissolved chemicals in soils and aquifers is important to evaluate and remediate contaminated soils and aquifers. Because of the nature of heterogeneity of field porous media, studies on transport processes in non-homogeneous media are necessary. In this study, …
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Electrical control of solute transport across polyelectrolyte membranes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
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Solute Transport Modelling of Latrobe Valley Ash Disposal Sites
… in evaluating the mechanisms which lead to the transport of solutes from ash disposal and develops a methodology to quantify their potential long term impacts on groundwaters beneath a disposal site. The Loy Yang power station is used as a case study. A detailed literature review is presented on …
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Modeling single-phase flow and solute transport across scales
Flow and transport phenomena in the subsurface often span a wide range of length (nanometers to kilometers) and time (nanoseconds to years) scales, and frequently arise in applications of CO₂ sequestration, pollutant transport, and near-well acid stimulation. Reliable field-scale predictions depend …
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Field and laboratory investigations of solute transport through soil
… soil hydraulic properties and mobile/immobile solute transport parameters in situ. In this study, immobile water contents (thetaim) and mass exchange coefficients (alpha) were estimated with the multiple tracer method and the single tracer methods on the same five field sites. The theta im …
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Numerical study of solute transport in deformable soil liners
… the temperature increases and then VOCs will be transported in the gaseous phase. Therefore, it is clear that the traditional approaches to assessing VOCs transport are inadequate to enable reliable assessment of VOCs break through landfill basal <br/>soil liner. This thesis attempts to make an …
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Physical controls on water flow and solute transport in coastal aquifers
Groundwater flow and associated subsurface solute fates have a significant impact on the structure and productivity of near-shore coastal ecosystems. For proper assessment and management of these coastal groundwater resources, it is quite essential to investigate the key factors (tides, waves, …
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Characterization of Water Flow and Solute Transport in Coarse Textured Materials
… ihrer hydraulischen Eigenschaften und ihrer Transporteigenschaften untersucht. Durch die Inversion eines Multi-Step Outflow Experiments konnten die hydraulischen Eigenschaften bestimmt werden. Die Anwendbarkeit dieser Methode wurde durch die Analyse der Differenzen zwischen gemessenen und …
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Solute Transport and Biodegradation Characteristics for Models of Enhanced Subsurface Bioremediation
… there are two important processes which control solute transport and biodegradation, namely, solute mixing that is enhanced by the retarded substrate velocity and localized nonlinear biodegradation that is limited to the mixing zone. The balanced interaction between these two processes causes the …
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Numerical characterization of solute transport in nested two-scale porous media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Fabrication, solute transport characterization and biological application of a microfluidic gradient chamber
… wafers using standard photolithography methods. Solute transport and microbial growth in the MGC was monitored and characterized by epi-fluorescence microscopy. Results show that by varying flow rates across the boundary flow channels, advective or diffusive transport processes control the …
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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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Numerical modelling of hydrodynamic and solute transport processes in shallow water environment
… numerical modelling of a range of hydrodynamic, solute transport and biochemical reaction processes in shallow water environment, combining both Euler and Lagrangian techniques. The research consists of two parts: the rapid flow modelling and the solute transport modelling. In the rapid flow …
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Modeling Spatial Variability of Field-Scale Solute Transport in the Vadose Zone
… of soil properties in one-dimensional solute transport models, and implemented with two existing root zone leaching models, Opus and GLEAMS. The accuracy of soil water, bromide and pesticide transport predictions from Opus-SF and GLEAMS-SF was evaluated using field-measured soil water …
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Modeling, analysis and numerical simulation of reactive solute transport problems in moving domains
… models and numerical schemes for reactive transport of a soluble substance in deformable media. The medium is a cylindrical channel with compliant adsorbing walls. The solutes are dissolved in a fluid flowing through the channel. The fluid, which carries the solutes, is viscous and …
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The Cell Analytic-Numerical Method for Solution of the Groundwater Solute Transport Equation
… method for the efficient solution of groundwater solute transport problems is developed and evaluated. The basic idea of the CAN method is the incorporation of local analytic solutions into the numerical solution of the partial differential equation. The CAN method decomposes the entire solution …
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Stochastic analysis of flow and solute transport in a variable-aperture rock fracture
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1984.
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