计算物理 ›› 1993, Vol. 10 ›› Issue (1): 1-8.

• 论文 •    下一篇

解扩散问题的DuFort-Frankel格式及其外推

杨情民, 宫安, 谢建   

  1. 湖南省计算中心, 长沙 410012
  • 收稿日期:1991-01-28 修回日期:1992-06-28 出版日期:1993-03-25 发布日期:1993-03-25

THE ASYMPTOTIC EXPANSION AND EXTRAPOLATION OFTHE SOLUTION OF DU FORT-FRANKEL SCHEMEFOR DIFFUSION PROBLEMS

Yang Qingmin, Gong An, Xie Jian   

  1. Hunan Computing Center, Changsha 410012
  • Received:1991-01-28 Revised:1992-06-28 Online:1993-03-25 Published:1993-03-25

摘要: 本文建立Du Fort-Frankel格式的解的渐近展式并进行外推,使外推解的精度达到O(τ2+h4),并且使相容性的限制大大得到改善。

关键词: Du Fort-Frankel格式的解的渐近展式, 外推, 减少计算量

Abstract: In this paper, we build the asymptotic expansion of solution of Du Fort-Frankel scheme for diffusion problem and then use extrapolation. The accruacy of the extrapolation solution may achieve O(τ2+h4) and the limitation of consistency is improved greatly.

Key words: the asymptotic expansion of the solution for Du Fort-Frankel scheme, extrapolation, reducing the computational work