计算物理 ›› 1992, Vol. 9 ›› Issue (2): 127-132.

• 论文 • 上一篇    下一篇

求解对流占优Burgers方程的随流格式

蒋锦良   

  1. 上海电力学院, 200090
  • 收稿日期:1991-05-17 修回日期:1991-11-01 出版日期:1992-06-25 发布日期:1992-06-25

THE FOLLOW-FLOW SCHEMES FOR SOLVING THE CONVECTION-DOMINATED BURGERS EQUATION

Jiang Jinliang   

  1. Shanghai Institute of Electric Power
  • Received:1991-05-17 Revised:1991-11-01 Online:1992-06-25 Published:1992-06-25

摘要: 在用差分方法求解对流占优的Burgers方程时,许多常用的差分格式的计算精度会下降。为了提高对流占优问题的计算精度,本文提出非线性对流项的差分格式的设计要求,从而得到对流项的新的差分格式-随流格式。本文通过算例来表明随流格式的优点。

关键词: 对流占优, Burgers方程, 随流格式

Abstract: When the convection-dominated Burgers equation is solved by use of the difference method, the computational accuracy of many usual difference schemes will lower.The designre-quirements of difference scheme of the non-linear convection term are presented, and some new difference schemes, which is known as follow-flow schemes, are obtained in this paper, in order to raise the computational accuracy of convection-dominated equation. The advantages of the follow-flow schemes are shown by means of some examples in this paper.

Key words: convection-dominated, Burgers equation, follow-flow scheme