Journal ArticleDOI
Modeling Kinetic Interphase Mass Transfer for Two-Phase Flow in Porous Media Including Fluid–Fluid Interfacial Area
TLDR
In this article, a new formulation of two-phase flow with interphase mass transfer is proposed based on thermodynamic principles, which comprises a mass balance for each component in each phase and a mass imbalance for specific interfacial area.Abstract:
Interphase mass transfer in porous media takes place across fluid–fluid interfaces. At the field scale, this is almost always a kinetic process and its rate is highly dependent on the amount of fluid–fluid interfacial area. Having no means to determine the interfacial area, modelers usually either neglect kinetics of mass transfer and assume local equilibrium between phases or they estimate interfacial area using lumped parameter approaches (in DNAPL pool dissolution) or a dual domain approach (for air sparging). However, none of these approaches include a physical determination of interfacial area or accounts for its role for interphase mass transfer. In this work, we propose a new formulation of two-phase flow with interphase mass transfer, which is based on thermodynamic principles. This approach comprises a mass balance for each component in each phase and a mass balance for specific interfacial area. The system is closed by a relationship among capillary pressure, interfacial area, and saturation. We compare our approach to an equilibrium model by showing simulation results for an air–water system. We show that the new approach is capable of modeling kinetic interphase mass exchange for a two-phase system and that mass transfer correlates with the specific interfacial area. By non-dimensionalization of the equations and variation of Peclet and Damkohler number, we make statements about when kinetic interphase mass transfer has to be taken into account by using the new physically based kinetic approach and when the equilibrium model is a reasonable simplification.read more
Citations
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Journal ArticleDOI
DuMux: DUNE for multi-{phase,component,scale,physics,…} flow and transport in porous media
Bernd Flemisch,Melanie Darcis,Karin Erbertseder,Benjamin Faigle,A. Lauser,Klaus Mosthaf,Steffen Müthing,P. Nuske,Alexandru Tatomir,Markus Wolff,Rainer Helmig +10 more
TL;DR: The paper provides an overview of DuMux with the focus on software-related aspects and selected examples highlight the multi-scale and the parallel capabilities.
Journal ArticleDOI
Parameter estimation by ensemble Kalman filters with transformed data: Approach and application to hydraulic tomography
TL;DR: In this article, the authors apply nonlinear, monotonic transformations to the observed states, rendering them Gaussian (Gaussian anamorphosis, GA) to improve EnKF for parameter estimation in groundwater applications.
Book
Introduction to the Thermodynamically Constrained Averaging Theory for Porous Medium Systems
William G. Gray,Cass T. Miller +1 more
TL;DR: The aim of this book is to provide a Discussion of the Foundations of Thermodynamically Constrained Averaging Theory and its Applications in Conservation and Modeling.
Journal ArticleDOI
Network model investigation of interfacial area, capillary pressure and saturation relationships in granular porous media.
TL;DR: In this paper, a pore network model is employed for simulating the equilibrium distribution of two fluids in a granular porous medium, under both drainage and imbibition conditions.
Journal ArticleDOI
A new approach for phase transitions in miscible multi-phase flow in porous media
TL;DR: In this paper, the phase transition conditions are formulated as a set of local inequality constraints, which are then integrated into the nonlinear solver using a nonlinear complementarity function.
References
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Journal ArticleDOI
Permeability of porous solids
R. J. Millington,J. P. Quirk +1 more
TL;DR: In this article, an expression was derived to describe both saturated and unsaturated permeability of porous media in terms of the pore size distribution as obtained from mercury-injection data or water-desorption isotherms.
Journal ArticleDOI
A Parametric Model for Constitutive Properties Governing Multiphase Flow in Porous Media
TL;DR: In this article, a parametric model is developed to describe relative permeability-saturation-fluid pressure functional relationships in two- or threefluid phase porous media systems subject to monotonic saturation paths.
Journal ArticleDOI
Thermodynamic basis of capillary pressure in porous media
TL;DR: In this paper, a thermodynamic approach to the definition of capillary pressure provides a theoretically sound alternative to the simple hysteretic function of saturation, and an approach is presented whereby the presence of interfaces and their distribution within a multiphase system are essential to describing the state of the system under study.
Journal ArticleDOI
Mechanics and thermodynamics of multiphase flow in porous media including interphase boundaries
TL;DR: In this paper, a macroscopic thermodynamic theory was developed to describe two-phase flow in porous media, where the authors developed a constitutive theory resulting in balance equations and thermodynamics appropriate for modelling multiphase flow.
Journal ArticleDOI
Dissolution of Trapped Nonaqueous Phase Liquids: Mass Transfer Characteristics
TL;DR: In this paper, the rate of interphase mass transfer between the nonaqueous phase liquids (NAPLs) phase and the aqueous phase is investigated in two-fluid systems.
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