dugksFoam: An open source OpenFOAM solver for the Boltzmann model equation

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• 作者：Lianhua Zhu ^{lhzhu@hust.edu.cn} ; Songze Chen ; ^{jacksongze@hust.edu.cn} ; Zhaoli Guo ; ^{zlguo@hust.edu.cn}
• 关键词：Boltzmann model equation ; OpenFOAM ; Discrete velocity method ; Parallel computing
• 刊名：Computer Physics Communications
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：213
• 期：Complete
• 页码：155-164
• 全文大小：2020 K
• 卷排序：213

文摘

A deterministic Boltzmann model equation solver called dugksFoam has been developed in the framework of the open source CFD toolbox OpenFOAM. The solver adopts the discrete unified gas kinetic scheme (Guo et al., 2015) with the Shakhov collision model. It has been validated by simulating several test cases covering different flow regimes including the one dimensional shock tube problem, a two dimensional thermal induced flow and the three dimensional lid-driven cavity flow. The solver features a parallel computing ability based on the velocity space decomposition, which is different from the physical space decomposition based approach provided by the OpenFOAM framework. The two decomposition approaches have been compared in both two and three dimensional cases. The parallel performance improves significantly using the newly implemented approach. A speed up by two orders of magnitudes has been observed using 256 cores on a small cluster.Program summaryProgram Title: dugksFoamProgram Files doi:http://dx.doi.org/10.17632/zwn7t9cf5w.1Licensing provisions: The MIT LicenseProgramming language: C++External routines/libraries: OpenFOAM (http://www.openfoam.org)Nature of problem: Solving the Boltzmann equation with Shakhov model explicitly.Solution method: Discrete unified gas kinetic scheme (DUGKS)Restrictions: Symmetric boundary condition can only be applied at walls parallel to axis directions.