A5049327409- Groundwater flow and contamination studies
- Enhanced Oil Recovery Techniques
- Lattice Boltzmann Simulation Studies
- Heat and Mass Transfer in Porous Media
- Hydraulic Fracturing and Reservoir Analysis
- Soil and Unsaturated Flow
- CO2 Sequestration and Geologic Interactions
- Advanced Mathematical Modeling in Engineering
- Advanced Numerical Methods in Computational Mathematics
- Hydrocarbon exploration and reservoir analysis
- Aerosol Filtration and Electrostatic Precipitation
- Numerical methods for differential equations
- Groundwater and Isotope Geochemistry
- Geophysical and Geoelectrical Methods
- Petroleum Processing and Analysis
- Fluid Dynamics and Turbulent Flows
- Generative Adversarial Networks and Image Synthesis
- Model Reduction and Neural Networks
- NMR spectroscopy and applications
- Rheology and Fluid Dynamics Studies
- Reservoir Engineering and Simulation Methods
- Hydrology and Watershed Management Studies
- Advanced Thermodynamics and Statistical Mechanics
- Computational Fluid Dynamics and Aerodynamics
- Composite Material Mechanics
University of North Carolina at Chapel Hill
2016-2025
Deakin University
2025
Naval Surface Warfare Center
2019
University of North Carolina Hospitals
2019
Virginia Tech
2016
University of North Carolina Health Care
2015
University of Florida
2010
BASF (Germany)
2004-2005
Robert Bosch (Germany)
2004
Weatherford College
2002
Many groundwater contamination incidents begin with the release of an essentially immiscible fluid into subsurface environment. Once in subsurface, participates a complex pattern transport processes. For fluids that are commonly found contaminated environments interphase mass transfer between nonaqueous phase liquids (NAPLs) and aqueous is important process. An experimental apparatus procedure were used to isolate measure toluene water glass bead media systems. The rate was investigated...
We simulate two‐fluid‐phase flow at the pore scale using a lattice Boltzmann (LB) approach. Using parallel processing version of Shan‐Chen model that we developed, set ideal two‐fluid systems and porous medium system comprised synthetic packing with relatively uniform distribution spheres. use two‐phase to validate approach provide parameter information, which then sphere‐pack system. The is designed mimic laboratory experiments conducted evaluate hysteretic capillary pressure saturation...
Significance The simultaneous flow of multiple fluid phases through a porous solid occurs in many natural and industrial processes. Microscale physical mechanisms such as the relative affinity for fluids (i.e., wettability), capillarity, viscosity combine with pore geometry to produce wide variety macroscopic patterns. Pore-scale modeling is an essential tool connect microscale patterns, but quantitative comparisons between different models, experimental data, are lacking. Here, we perform...
Recent studies have revealed that viscous coupling effects in immiscible two-phase flow, caused by momentum transfer between the two fluid phases, can be important porous medium systems. In this work, we use a three-dimensional parallel processing version of two-fluid-phase lattice Boltzmann (LB) model to investigate phenomenon. A multiple-relaxation-time (MRT) approximation LB equations is used simulator, which leads viscosity-independent velocity field. We validate our verifying profile...
Several mathematical formulations have analyzed the time-dependent behaviour of a tumor mass. However, most these propose simplifications that compromise physical soundness model. Here, multiphase porous media mechanics is extended to model evolution, using governing equations obtained via Thermodynamically Constrained Averaging Theory (TCAT). A mass treated as medium composed an extracellular matrix (ECM); cells (TC), which may become necrotic depending on nutrient concentration and phase...
Models that describe two-fluid flow in porous media suffer from a widely-recognized problem the constitutive relationships used to predict capillary pressure as function of fluid saturation are non-unique, thus requiring hysteretic description. As an alternative traditional perspec- tive, we consider geometrical description pressure, which relates average mean curvature, saturation, interfacial area between fluids, and Euler characteristic. The state equation is formulated using notions...
Molecular-scale simulations of pressure-driven transport through polyamide nanogaps (5–100 Å) were performed to investigate fundamental mechanisms. Results show that in ≤ 10 Å is always subdiffusive, but superdiffusive was observed ≥ 20 Å. Near typical operating pressures for applications (Δp = 100 atm), only the nanogap exhibited behavior. Since openings common membrane materials are typically <20 Å, results indicate subdiffusive diffusive dominates applications, such as reverse osmosis.
We use two pore-scale approaches, lattice-Boltzmann (LB) and pore-network modeling, to simulate single-phase flow in simulated sphere packings that vary porosity sphere-size distribution. For both modeling we determine the size of representative elementary volume with respect permeability. Permeabilities obtained by LB agree well Rumpf Gupte's experiments for small Reynolds numbers. The simulations empirical Ergun equation intermediate but not suggest a modified form Ergun's describe low...
Capillary pressure–saturation‐relative permeability relations described using the van Genuchten [1980] and Mualem [1976] models for nonuniform porous media lead to numerical convergence difficulties when used with Richards' equation certain auxiliary conditions. These arise because of discontinuities in derivative specific moisture capacity relative as a function capillary pressure. Convergence are illustrated standard approaches simulate such problems. We investigate constitutive relations,...
A two‐dimensional multiphase flow and species transport model was developed applied to the case of nonaqueous phase liquid (NAPL) emplacement dissolution in both homogeneous heterogeneous porous media systems. Simulations were performed observe rate variations degree NAPL‐aqueous nonequilibrium as a function two aqueous velocities five forms mass transfer formulation. An integrated form Damkohler number introduced analyze nonequilibrium. Mass removal rates for insensitive formulation,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCosolvent-Enhanced Remediation of Residual Dense Nonaqueous Phase Liquids: Experimental InvestigationPaul T. Imhoff, Simon N. Gleyzer, John F. McBride, Laura A. Vancho, Itaru. Okuda, and Cass MillerCite this: Environ. Sci. Technol. 1995, 29, 8, 1966–1976Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August...