期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 266, 期 -, 页码 22-46出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2014.01.050
关键词
Kinetic equations; Discrete velocity model; Deterministic method; Rarefied gas dynamics
资金
- the Investments for the future Programme IdEx Bordeaux - CPU [ANR-10-IDEX-03-02]
Most of numerical methods for deterministic simulations of rarefied gas flows use the discrete velocity (or discrete ordinate) approximation. In this approach, the kinetic equation is approximated with a global velocity grid. The grid must be large and fine enough to capture all the distribution functions, which is very expensive for high speed flows (like in hypersonic aerodynamics). In this article, we propose to use instead different velocity grids that are local in time and space: these grids dynamically adapt to the width of the distribution functions. The advantages and drawbacks of the method are illustrated in several 1D test cases. (C) 2014 Elsevier Inc. All rights reserved.
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