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Permeability in two-component porous media; effective-medium approximation compared with lattice-Boltzmann simulations

Behzad Ghanbarian and Hugh Daigle
Permeability in two-component porous media; effective-medium approximation compared with lattice-Boltzmann simulations (in Soil as complex systems, Boris Faybishenko (prefacer), Susan Hubbard (prefacer), Eoin Brodie (prefacer), Peter Nico (prefacer), Fred Molz (prefacer), Allen G. Hunt (prefacer) and Yakov Pachepsky (prefacer))
Vadose Zone Journal (February 2016) 15 (2)

Abstract

Porous materials such as rocks, soils, and peats are typically complex mixtures built up of more than one component, with intrinsic permeabilities that depend on factors such as pore shape and surface area, tortuosity, and connectivity. In such media, the macroscopic permeability is an integrated combination of the permeabilities of the individual components. In this study, we numerically simulated fluid flow in binary mixtures of low- and high-permeability components constructed of spheres and ellipsoids using the lattice-Boltzmann (LB) method to model permeability in porous media. We then applied the effective-medium approximation (EMA) to predict permeability in the simulated binary mixtures. Our results indicate a very good match between predicted permeabilities by EMA and those simulated by LB in simple and body-centered cubic packs as long as the permeability of the high-permeability component K (sub h) is not substantially different than that of the low-permeability component K (sub l) . The upper limit of K (sub h) /K (sub l) for which the EMA approach results in very accurate permeability predictions depends on several factors, such as packing arrangement, grain shape, and porosity. Including all data, we found the EMA permeability predictions still within a factor of two of the LB simulations.


ISSN: 1539-1663
Serial Title: Vadose Zone Journal
Serial Volume: 15
Serial Issue: 2
Title: Permeability in two-component porous media; effective-medium approximation compared with lattice-Boltzmann simulations
Title: Soil as complex systems
Author(s): Ghanbarian, BehzadDaigle, Hugh
Author(s): Faybishenko, Borisprefacer
Author(s): Hubbard, Susanprefacer
Author(s): Brodie, Eoinprefacer
Author(s): Nico, Peterprefacer
Author(s): Molz, Fredprefacer
Author(s): Hunt, Allen G.prefacer
Author(s): Pachepsky, Yakovprefacer
Affiliation: University of Texas at Austin, Department of Petroleum & Geosystems Engineering, Austin, TX, United States
Affiliation: Lawrence Berkeley National Laboratory, Earth Sciences Division, Berkeley, CA, United States
Published: 201602
Text Language: English
Publisher: Soil Science Society of America, Madison, WI, United States
Number of pages: 10
References: 71
Accession Number: 2016-025859
Categories: Soils
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: Clemson University, USA, United StatesWright State University, USA, United StatesU. S. Department of Agriculture-Agricultural Research Service, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201613
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