Actions for Intercomparison of 3D pore-scale flow and solute transport simulation methods [electronic resource].

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Intercomparison of 3D pore-scale flow and solute transport simulation methods [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 176-189 : digital, PDF file
Additional Creators
Pacific Northwest National Laboratory (U.S.), United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
In this study, multiple numerical approaches have been developed to simulate porous media fluid flow and solute transport at the pore scale. These include (1) methods that explicitly model the three-dimensional geometry of pore spaces and (2) methods that conceptualize the pore space as a topologically consistent set of stylized pore bodies and pore throats. In previous work we validated a model of the first type, using computational fluid dynamics (CFD) codes employing a standard finite volume method (FVM), against magnetic resonance velocimetry (MRV) measurements of pore-scale velocities. Here we expand that validation to include additional models of the first type based on the lattice Boltzmann method (LBM) and smoothed particle hydrodynamics (SPH), as well as a model of the second type, a pore-network model (PNM). The PNM approach used in the current study was recently improved and demonstrated to accurately simulate solute transport in a two-dimensional experiment. While the PNM approach is computationally much less demanding than direct numerical simulation methods, the effect of conceptualizing complex three-dimensional pore geometries on solute transport in the manner of PNMs has not been fully determined. We apply all four approaches (FVM-based CFD, LBM, SPH and PNM) to simulate pore-scale velocity distributions and (for capable codes) nonreactive solute transport, and intercompare the model results. Comparisons are drawn both in terms of macroscopic variables (e.g., permeability, solute breakthrough curves) and microscopic variables (e.g., local velocities and concentrations). Generally good agreement was achieved among the various approaches, but some differences were observed depending on the model context. The intercomparison work was challenging because of variable capabilities of the codes, and inspired some code enhancements to allow consistent comparison of flow and transport simulations across the full suite of methods. This study provides support for confidence in a variety of pore-scale modeling methods and motivates further development and application of pore-scale simulation methods.
Report Numbers
E 1.99:pnnl-sa--109346
pnnl-sa--109346
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Note
Published through SciTech Connect.
09/28/2015.
"pnnl-sa--109346"
": S0309170815002225"
Advances in Water Resources 95 ISSN 0309-1708 AM
Xiaofan Yang; Yashar Mehmani; William A. Perkins; Andrea Pasquali; Martin Schonherr; Kyungjoo Kim; Mauro Perego; Michael L. Parks; Nathaniel Trask; Matthew T. Balhoff; Marshall C. Richmond; Martin Geier; Manfred Krafczyk; Li -Shi Luo; Alexandre M. Tartakovsky; Timothy D. Scheibe.
Funding Information
AC05-76RL01830
AC04-94AL85000
AC02-05CH11231
SC0001114
View MARC record | catkey: 23768955