计算物理 ›› 1992, Vol. 9 ›› Issue (S1): 479-484.

• 论文 •    下一篇

差分格式的余项效应研究

刘儒勋   

  1. 中国科学技术大学合肥 230026
  • 收稿日期:1992-05-18 出版日期:1992-12-31 发布日期:1992-12-31
  • 基金资助:
    中国科学院数学特别支持费资助课题

THE RESEARCH ON THE REMAINDER EFFECTS OF FINITE DIFFERENCE SCHEMES

Liu Ruxun   

  1. Department of Mathematics University of Science and Technology of China Hefei, Anhui 230026
  • Received:1992-05-18 Online:1992-12-31 Published:1992-12-31

摘要: 采用差分格式的Modified PDE,对其余项进行了统一的、系统的分析和研究,定义了色散关系式和耗散关系式,根据这两个关系式对差分格式的稳定、耗散、色散,以及群速度效应作了较全面的讨论,并指出了余项分析的意义和实用价值。

关键词: 差分法, MPDE, 余项效应

Abstract: In the paper, based on the Modified PDE of finite difference schemes, a general and systematical research and analysis on the remainder effects of finite difference schemes are advanced. The dissipasion relationship and the dispersion relationship are defined. By the use of the two relationships, the stability, the dissipation, the dispersion and the group velocity of finite difference schemes are all disccused.

Key words: finite difference scheme, Modified PDE, remainder effect, group velocity