计算物理 ›› 1995, Vol. 12 ›› Issue (2): 255-260.

• 论文 • 上一篇    下一篇

NS方程的一个开路边条件

陈耀松, 江涛   

  1. 北京大学力学系, 北京 100871
  • 收稿日期:1993-10-16 出版日期:1995-06-25 发布日期:1995-06-25
  • 基金资助:
    国家自然科学基金提供资助

AN OPEN BOUNDARY CONDITION FOR N.S. EQATIONS

Chen Yaosong, Jiang Tao   

  1. Department of Mechanics, Peking University, Beijing 100871
  • Received:1993-10-16 Online:1995-06-25 Published:1995-06-25

摘要: 开路边条件(Open Boundary Condition)的设计是计算流体力学中较难的课题。利用Navier-Stokes方程在远场的摄动解作为设计OBC的基础,对文献[1]提出的四个问题中的第一个(二维定常、层流不可压的管道后台阶流动)进行了检行了检验,结果表明我们设计的OBC基本上是成功的.

关键词: 开路边条件(OBC), NS方程, 特征解

Abstract: The design of open boundary condition (OBC) is one of the most challenging problems in the field of nummerical computation for N. S. equation. In this article the perturbation solution of N.S. equation in the region approaching to infinity is taken as the basis for designing the OBC. A testing example proposed by M.philip has been calculated. The results show that the present OBC is superior to all others existing in literature.

Key words: OBC, N.S.equations, eigen-solution

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