计算物理 ›› 1999, Vol. 16 ›› Issue (1): 39-44.

• 论文 • 上一篇    下一篇

减小网格畸变的结点耦合法

段庆生, 袁国兴, 王丽华   

  1. 北京应用物理与计算数学研究所, 100088
  • 收稿日期:1997-12-22 修回日期:1998-09-02 出版日期:1999-01-25 发布日期:1999-01-25
  • 作者简介:段庆生,男,59,研究员
  • 基金资助:
    国家863高技术惯性约束聚变主题资助课题

The reduction of mesh distortion by the use of node couple method

Duan Qingsheng, Yuan Guoxing, Wang Lihua   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088
  • Received:1997-12-22 Revised:1998-09-02 Online:1999-01-25 Published:1999-01-25

摘要: 在二维可压缩流体力学的Lagrange数值计算中,为了减少四边形网格的畸变,给出了一种耦合结点速度的方法,并说明了这种方法相当于在动量方程中引进了一项具有耗散性质的四阶光滑化项,从而起着阻尼速度的非物理振荡的作用。

关键词: Lagrange数值, 计算阻尼速度的非物理振荡, 大长宽比网格

Abstract: A method of couple node velocity is given for reducing distortion of quadrilateral mesh in Lagrangian numerical computation of two dimensional compressible hydrodynamics. It is verified that this method is equivalent to introducing four order smooth term with dissipation property in the momentum equation, thus it plays a role of damping the unphysical oscillation of velocity.

Key words: Lagrangian numerical computation, Damping unphysical oscillation of the velocity, Large aspect ratios mesh

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