计算物理 ›› 1991, Vol. 8 ›› Issue (2): 149-156.

• 论文 • 上一篇    下一篇

λ格式及其改进

周红, 刘儒勋   

  1. 中国科学技术大学数学系, 合肥 230026
  • 收稿日期:1990-07-19 出版日期:1991-06-25 发布日期:1991-06-25

THE λ-SCHEME AND ITS IMPROVEMENT

Zhou Hong, Liu Ruxun   

  1. University of Sci. & Tech. of China, Hefei 230026
  • Received:1990-07-19 Online:1991-06-25 Published:1991-06-25

摘要: 本文利用λ格式做了两个典型的一维流体力学问题的数值模拟。由于λ格式色散效应过强,出现非线性不稳定性,笔者针对这一现象给出了λ格式的改进格式,所得结果比较令人满意。

关键词: λ格式, 特征线, 数值模拟

Abstract: In the paper, an improvement λ-type scheme is proposed based on characteristics idea in order to overcome the strong dispersive effect or nonlinear instability of the original λ-scheme. Furthermore, the numerical simulations of two models of ID computational fluid dynamics problems by using the improvement scheme are given, and the numerical results are satisfactory.

Key words: λ-scheme, characteristics, numerical simulation