http://scholars.ntou.edu.tw/handle/123456789/11913
Title: | A conservative discrete ordinate method for model Boltzmann equations | Authors: | Juan-Chen Huang | Keywords: | Model Boltzmann equation;Discrete ordinate method;Rarefied gas flow | Issue Date: | Jun-2011 | Journal Volume: | 45 | Journal Issue: | 1 | Source: | Computers & Fluids | Abstract: | 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. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/11913 | ISSN: | 0045-7930 | DOI: | 10.1016/j.compfluid.2010.11.001 |
Appears in Collections: | 商船學系 |
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