计算物理 ›› 2003, Vol. 20 ›› Issue (4): 298-306.

• 论文 • 上一篇    下一篇

二维非线性抛物方程广义差分法/有限体积法的自适应计算

武海军, 李永海, 李荣华   

  1. 吉林大学数学院, 吉林 长春 130012
  • 收稿日期:2002-04-18 修回日期:2002-08-25 出版日期:2003-07-25 发布日期:2003-07-25
  • 作者简介:武海军(1970-),男,博士,从事有限元和有限体积法的自适应计算方面的研究.
  • 基金资助:
    北京应用物理与计算数学研究所计算物理实验室基金资助项目

Adaptive Generalized Difference/Finite Volume Computations for Two Dimensional Nonlinear Parabolic Equation

WU Hai-jun, LI Yong-hai, LI Rong-hua   

  1. College of Mathematical Science, Jilin University, Changchun 130012, China
  • Received:2002-04-18 Revised:2002-08-25 Online:2003-07-25 Published:2003-07-25

摘要: 给出三角网上二维非线性抛物方程广义差分法(有限体积法)的一种基于残量估计的后验误差估计,并在此基础上设计了自适应计算方案,以适应物理解在时空的大梯度变化.提出了适合发展方程自适应计算的三角网数据结构(不是树状结构)和灵活的局部粗化算法.

关键词: 非线性抛物方程, 广义差分法, 有限体积法, 自适应计算, 三角网粗化算法

Abstract: A posteriori error estimates of residual type for generalized difference method (finite volume method) are derived for 2-D nonlinear parabolic equation on triangular meshes and an adaptive scheme suitable to problems with sharp moving fronts is designed.A data structure (not a tree structure) and a flexible local coarsening method for triangular meshes suitable to adaptive computations for evolution problems are also presented.

Key words: nonlinear parabolic equation, generalized difference method, finite volume method, adaptive computation, coarsening method for triangular meshes

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