期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 256, 期 -, 页码 17-33出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2013.08.051
关键词
Kinetic; S-model; Unstructured; Micro; Rarefied; Implicit; Re-entry vehicle; Parallel
资金
- Russian government under grant On Measures to Attract Leading Scientists to Russian Educational Institutions [11.G34.31.0072]
- Italian Ministry of Research (MIUR)
- British Council under the project British-Italian Partnership Programme for Young Researchers
- European Research Council (ERC) under the European Union Seventh Framework Programme [278267]
The paper is devoted to the further development and systematic performance evaluation of a recent deterministic framework Nesvetay-3D for modelling three-dimensional rarefied gas flows. Firstly, a review of the existing discretization and parallelization strategies for solving numerically the Boltzmann kinetic equation with various model collision integrals is carried out. Secondly, a new parallelization strategy for the implicit time evolution method is implemented which improves scaling on large CPU clusters. Accuracy and scalability of the methods are demonstrated on a pressure-driven rarefied gas flow through a finite-length circular pipe as well as an external supersonic flow over a three-dimensional re-entry geometry of complicated aerodynamic shape. (C) 2013 Elsevier Inc. All rights reserved.
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