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Showing 1 to 20 of 50 for “"flow in porous media"”.
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Acoustic Stimulation of Multiphase Flow in Porous Media
… phenomenon of acoustic stimulation of multiphase flow in porous media. To model multiphase flow, we use simple geometrical configurations consisting of a periodic train of fluid droplets in both straight and constricted capillary tubes. The Navier-Stokes equations are solved via the Galerkin …
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Fluid flow in porous media : NMR imaging and numerical simulation
We use nuclear magnetic resonance (NMR) imaging to obtain a three-dimensional image of the pore structure in a limestone core, 4.5 mm in diameter and 10 mm in length, with a resolution of 40 [mu]m. This image is converted into boundary conditions for simulation of fluid flow through the rock using …
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A Fourier finite element model for unsaturated flow in porous media
A new numerical methodology for solving the partial differential equation governing the unsaturated flow of water in porous media is developed and applied to approximate the hydraulic head and to solve for the flux functions that obey the one-dimensional unsaturated flow equation. The algorithms …
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Modeling of Foam Flow in Porous Media for Subsurface Environmental Remediation
Among numerous foam applications in a wide range of disciplines, foam flow in porous media has been spotlighted for improved/enhanced oil recovery processes in petroleum-bearing geological formations and shallow subsurface in-situ NAPL (non-aqueous phase liquid) environmental remediation in …
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Numerical studies of flow in porous media using an unstructured approach
Flow and transport in porous media is relevant to many areas of engineering and science including groundwater hydrology and the recovery of oil and gas. Porous materials are characterized by the unique shape and connectivity of the internal void structures which give rise to a large range in …
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Physics-based models of hysteresis in multiphase flow in porous media
… events to derive a theory of hysteresis in multiphase flow in porous media. In particular, we define the pore-space accessivity to contrast the serial and parallel arrangement of different-radius pore slices, and the radius-resolved saturations to detail the pore-scale distribution of …
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Image-Based Pore-Scale Modeling of Inertial Flow in Porous Media and Propped Fractures
Non-Darcy flow is often observed near wellbores and in hydraulic fractures where relatively high velocities occur. Quantifying additional pressure drop caused by non-Darcy flow and fundamentally understanding the pore-scale inertial flow is important to oil and gas production in hydraulic …
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On relative permeability : a new approach to two-phase fluid flow in porous media
Being valid for single-phase flow, Darcy's law is adapted to two-phase flow through the standard approach of relative permeability, in which permeability, rather than being a unique property of the porous medium, becomes a joint property of the porous medium and each fluid phase. The goal of this …
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Development of a Numerical Solver for Phase-Change and Two-Phase Flow in Porous Media
Porous media are used in several thermal management systems, such as loop-heat-pipes, to control the temperature of electronics and other components. It is important to understand the mechanisms of flow and phase-change in porous media to better control/increase the performance of those systems. In …
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Multiphase flow in porous media with phase transitions : from CO₂ sequestration to gas hydrate systems
Ongoing efforts to mitigate climate change include the understanding of natural and engineered processes that can impact the global carbon budget and the fate of greenhouse gases (GHG). Among engineered systems, one promising tool to reduce atmospheric emissions of anthropogenic carbon dioxide …
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Multiphase flow in porous media: the impact of capillarity and wettability from field-scale to pore-scale
Multiphase flow in the context of this Thesis refers to the simultaneous flow of immiscible fluids. It differs significantly from single-phase flow due to the existence of fluid-fluid interfaces, which are subject to capillary forces. Multiphase flow in porous media is important in many natural and …
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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
<p>Synchrotron XCT imaging approaches applied in this study provides crucial information on the impact of image voxel resolution on image based simulation results and the characteristic length scales that can be extracted from XCT image data sets. The methods and results in this work provides a …
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Mitigating the Problem of Non-uniqueness in Fluid-flow Modeling
Modeling fluid flow in porous media is a valuable and essential tool for developing underground resources such as hydrocarbon reservoirs, groundwater aquifers, or CO₂ sequestration projects. The modeling, if done accurately, can provide a reliable forecast of future fluid behavior. However, the …
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Multi-scale Investigations of Geological Carbon Sequestration in Deep Saline Aquifers
… carbon dioxide (CO2) sequestration (GCS) in deep saline aquifers is viewed as a viable solution to dealing with the impact of anthropogenic CO2 emissions on global warming. The trapping mechanisms that control GCS include capillary trapping, structural trapping, dissolution trapping, and …
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Development of a high-order accurate reservoir simulator using spectral element method
… the future performance of a reservoir. Modeling multiphase fluid flow in porous media can be computationally challenging due to heterogeneous geologic features and sharp, moving fluid interfaces. Low-order convergence of conventional reservoir simulators, often based on finite volume or …
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A posteriori error estimates and adaptive methods for convection dominated transport processes
In this thesis we derive robust a posteriori error estimates <br>for finite volume approximations of convection dominated nonlinear <br>transport problems. <br>Robustness means that the error estimates are uniform with respect to <br>vanishing diffusion coefficients. <br>The a posteriori error …
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