计算物理 ›› 1991, Vol. 8 ›› Issue (2): 157-164.

• 论文 • 上一篇    下一篇

对流扩散方程的一些单调性差分格式

陆金甫   

  1. 清华大学应用数学系, 北京 100084
  • 收稿日期:1990-08-15 修回日期:1991-03-25 出版日期:1991-06-25 发布日期:1991-06-25

SOME MONOTONIC DIFFERENCE SCHEMES FOR CONNECTION-DIFFUSION EQUATIONS

Lu Jinfu   

  1. Tsinghua University
  • Received:1990-08-15 Revised:1991-03-25 Online:1991-06-25 Published:1991-06-25

摘要: 本文分析了逆风格式、格式和修正Dennis格式随网格Reynolds数变化的性质,构造了相应的半隐差分格式,它们具有无条件稳定性和无条件单调性。数值例子说明这些格式可以计算高Reynolds的定态流动问题。

关键词: 对流扩散方程, 差分格式, 稳定性, 单调性

Abstract: With the varieties of the cell Reynolds number,We analyse the properties of the upwind scheme, the Samarskii Scheme and the modified Dennis scheme for convection-diffusion equations. Three semi-implicit schemes which are unconditionally stable and monotonic are present by those schemes. Numerical tests have shown these semi-implicit can be applied to solve for the steady fluid flow problems of high Reynolds.

Key words: convection-diffusion equation, finite difference scheme, stability, monotonicity