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A conservative lattice Boltzmann model for the volume-averaged Navier–Stokes equations based on a novel collision operator

Bruno Blais, Jean-Michel Tucny, David Vidal, François Bertrand

Article (2015)

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Abstract

The volume-averaged Navier–Stokes (VANS) equations are at the basis of numerous models used to investigate flows in porous media or systems containing multiple phases, one of which is made of solid particles. Although they are traditionally solved using the finite volume, finite difference or finite element method, the lattice Boltzmann method is an interesting alternative solver for these equations since it is explicit and highly parallelizable. In this work, we first show that the most common implementation of the VANS equations in the LBM, based on a redefined collision operator, is not valid in the case of spatially varying void fractions. This is illustrated through five test cases designed using the so-called method of manufactured solutions. We then present an LBM scheme for these equations based on a novel collision operator. Using the Chapman–Enskog expansion and the same five test cases, we show that this scheme is second-order accurate, explicit and stable for large void fraction gradients.

Uncontrolled Keywords

Computational fluid dynamics; Volume-averaged Navier–Stokes equations; Lattice Boltzmann method; Method of manufactured solutions; Multiphase flowsPorous media

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
Department: Department of Chemical Engineering
Research Center: URPEI - Research Center in Industrial Flow Processes
Funders: CRSNG/NSERC, CRSNG/NSERC - Vanier Scholarship
Grant number: RGPIN-2014-05056)
PolyPublie URL: https://publications.polymtl.ca/9063/
Journal Title: Journal of Computational Physics (vol. 294)
Publisher: Elsevier
DOI: 10.1016/j.jcp.2015.03.036
Official URL: https://doi.org/10.1016/j.jcp.2015.03.036
Date Deposited: 11 Aug 2021 17:37
Last Modified: 16 Nov 2022 17:18
Cite in APA 7: Blais, B., Tucny, J.-M., Vidal, D., & Bertrand, F. (2015). A conservative lattice Boltzmann model for the volume-averaged Navier–Stokes equations based on a novel collision operator. Journal of Computational Physics, 294, 258-273. https://doi.org/10.1016/j.jcp.2015.03.036

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