期刊
COMPUTERS & FLUIDS
卷 45, 期 1, 页码 261-267出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compfluid.2010.11.001
关键词
Model Boltzmann equation; Discrete ordinate method; Rarefied gas flow
资金
- National Science Council, Taiwan [NSC 96-2221-E-019-067-MY2]
A class of conservative discrete ordinate method (C-DOM) for the Bhatnagar-Gross-Krook (BGK) model Boltzmann equation is presented. The C-DOM is the extension of the discrete ordinate method in my previous study (Yang and Huang, 1995 [3]). In the C-DOM, a conservative molecular collision process is employed and thus the conservation properties of the collision integral are maintained at the molecular level. For a broad range of Knudsen number, several test problems, including unsteady shock-tube problem and supersonic/hypersonic flows over circular cylinder, are utilized to demonstrate the performance and validity of the DOM and C-DOM. Results show that the C-DOM can greatly reduce the computer time and memory requirements in hypersonic rarefied gas flow computations. (C) 2010 Elsevier Ltd. All rights reserved.
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