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Showing 1 to 16 of 16 for “"Porous media flow"”.
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Meshless Discrete Velocity Boltzmann Model for Porous Media Flow
… of phenomena; while it can be used for fluid flow at Navier-Stokes scales, it can also resolve fine features that can only be described at the molecular level. This type of model is necessary for a wide range of applications, e.g., rarefied gases, multiphase flows, and chemically reactive …
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A locally conservative variational multiscale method for the simulation of porous media flow with multiscale source terms
Multiscale phenomena are ubiquitous to flow and transport in porous media. They manifest themselves through at least the following three facets: (1) effective parameters in the governing equations are scale dependent; (2) some features of the flow (especially sharp fronts and boundary layers) …
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Transport, Stability, and Deposition of Gold Nanoparticles in Porous Media
… to be more stable relative to cit-AuNP during porous media flow in the presence of increasing concentrations of CaCl2, but the opposite occurred with increasing NaCl concentration. Colloidal filtration theory (CFT) fails to predict and explain this discrepancy. DLVO calculations suggested …
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Extracting Physically Realistic Pore Network Features from XCT Data and Investigating the Impact of Pore Topology on Flow in Porous Media
… in generating reliable and representative porous media flow and transport properties via image processing and pore scale simulations through XCT image data sets of porous media. This study also shows how XCT imaging, coupled with pore topological and morphological measures can be utilized …
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The effect of fluid acceleration on sediment transport in the surf zone
… wave was sufficient to drive a substantial porous-media flow, adequate to create a soil-mechanics type failure extending several centimeters into a sandy sediment bed. The theoretical model of Madsen (1974) is extended to obtain estimates of subsurface transport by subdividing the sediment …
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Decoupling methods for the time-dependent Navier-Stokes-Darcy interface model
… involved with or even dominated by the coupled porous media flow and free flow. We first discuss a semi-implicit, multi-step non-iterative domain decomposition (NIDDM) to solve a coupled unsteady NS-Darcy system with Beavers-Joseph-Saffman-Jones (BJSJ) interface condition and obtain optimal …
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Experiments in fluid spreading in the partial wetting regime
… importance in surface treatment technologies, porous media flow, and common naturally ocurring phenomena. In the complete wetting case, a fluid will spread until it can cover the entire surface with a thin film of molecular thickness; the dynamics of these fluids are well understood. In the …
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An adjoint-based optimization method using the solution of gray-box conservation laws
… is unknown, but the full solution of relevant flow quantities is available. Optimization constrained by gray-box simulations can be challenging for high-dimensional design because the adjoint method is not directly applicable. My thesis considers the gray-box models whose flux functions contain …
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Flow and reactive transport modeling at the stream-groundwater interface
… in fluvial streambed structures on the intermediate scale (10–30m). 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 …
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Transition between Flow Regimes in Porous Media Using Magnetic Resonance Velocimetry: From Laminar to Turbulent
… to investigate the transition between different flow regimes in porous media. The complete transition spectrum of single-phase flow, from creeping flow to inertial, unsteady laminar, and turbulent flow regimes, was examined in sphere packings. Further understanding of the fundamental fluid …
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Efficient algorithms for flow models coupled with geomechanics for porous media applications
The coupling between subsurface flow and reservoir geomechanics plays a critical role in obtaining accurate results for models involving reservoir deformation, surface subsidence, well stability, sand production, waste deposition, hydraulic fracturing, CO₂ sequestration, and hydrocarbon recovery. …
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Shear Fracture Growth in Granular Rocks and Porosity-Permeability Relationships in Mudstones
… and during fluid injection by simulating porous media flow using the lattice Boltzmann method. I define the mudstone structure using clay platelet thickness, aspect ratio, orientation and pore widths. Over the representative range of clay platelet lengths (0.1 – 3 µm), aspect ratios …
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Development of a coupled CFD—system-code capability (with a modified porous media model) and its applications to simulate current and next generation reactors
… goal is achieved by first implementing improved porous media models in a commercial CFD code and then by judicious coupling of the CFD code with a coarse nuclear system code. Computationally intensive CFD is used in spatial domains where the flow is expected to be three-dimensional; whereas a …
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Black oil simulation utilizing a central finite volume scheme
… in predicting the multi-phase multi-component flow of fluids in reservoirs. This research validates the use of a central high resolution finite volume scheme developed by Kurganov and Tadmor (KT) to the black-oil model problem. The KT scheme is desirable because of its relative ease of …
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Numerical and experimental study of the impact of temperature on relative permeability in an oil and water system.
Relative permeability is affected by several flow parameters, predominantly operating temperature and fluid viscosity. Fluid viscosity changes with temperature, which correspondingly affects the relative permeability. Temperature is believed to have a considerable effect on oil–water relative …