计算物理 ›› 2004, Vol. 21 ›› Issue (4): 316-320.

• 研究论文 • 上一篇    下一篇

DSMC方法的压力边界条件实现

王沫然, 王金库, 李志信   

  1. 清华大学工程力学系, 北京 100084
  • 收稿日期:2003-03-28 修回日期:2003-10-17 出版日期:2004-07-25 发布日期:2004-07-25
  • 作者简介:王沫然(1977-),男,吉林省吉林市,博士,主要从事MEMS及微尺度流动换热模拟.
  • 基金资助:
    国家自然科学基金(批号:59995550-2);国家重点基础研究发展规划(批号:G1999033106)资助项目

New Implement of Pressure Boundary Conditions for DSMC

WANG Mo-ran, WANG Jin-ku, LI Zhi-xin   

  1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
  • Received:2003-03-28 Revised:2003-10-17 Online:2004-07-25 Published:2004-07-25

摘要: 提出了一种实现DSMC压力边界条件的新方法,新方法不仅可以避免传统"通量法"造成的计算发散问题,又较之"入口平均法"有更快的收敛速度.使用这种方法,对不同压差驱动下等壁温微通道内的气体流动进行了模拟,并与传统的基于连续介质假设的滑移理论所得结果进行了比较.

关键词: 压力边界条件, 微流动, DSMC

Abstract: A new treatment of pressure boundary condition for DSMC method is proposed.With the new method,the computational divergence of traditional "number flux method" can be avoided and a higher convergence speed than the "averaged at inlet" method is obtained.The flows in micro-channels driven by different pressure drops are investigated using the new method.Comparison between DSMC results and continuum-based results has also been made.

Key words: pressure boundary condition, micro flow, DSMC

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