计算物理 ›› 2008, Vol. 25 ›› Issue (6): 649-658.

• 研究论文 • 上一篇    下一篇

限制加性许瓦兹预条件的变形及其在二维三温能量方程中的应用

曹艳华1,2, 刘兴平2, 谷同祥2   

  1. 1. 华北电力大学(北京)数理系, 北京 102206;
    2. 北京应用物理与计算数学研究所 计算物理实验室, 北京 100088
  • 收稿日期:2007-06-21 修回日期:2007-12-09 出版日期:2008-11-25 发布日期:2008-11-25
  • 作者简介:Cao Yanhua(1976-),male,Hunan,PhD,major in computation mathematics.
  • 基金资助:
    the National Natural Science Foundation of China(granted No.10571017,10701015,60373015 and 60533020);National Basic Research Program of China(granted No.2005CB221300)

A Variant Restricted Additive Schwarz Preconditioner and Application in Two-dimensional Three-temperature Energy Equations

CAO Yanhua1,2, Liu Xingping2, GU Tongxiang2   

  1. 1. North China Electric Power University, Department of Mathematics and Physics, Beijing 102206, China;
    2. LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2007-06-21 Revised:2007-12-09 Online:2008-11-25 Published:2008-11-25
  • Supported by:
    the National Natural Science Foundation of China(granted No.10571017,10701015,60373015 and 60533020);National Basic Research Program of China(granted No.2005CB221300)

摘要: 给出标准限制加性许瓦兹预条件的变形,并应用当前流行的Newton-Krylov-Schwarz方法,结合该预条件子,求解由二维三温能量方程离散得到的非线性代数方程组,减少收敛所需要的迭代次数和所需的CPU时间.数值实验表明,该方法比标准限制加性许瓦兹预条件方法收敛所需要的迭代次数和CPU时间要少.

关键词: 并行计算, 预条件矩阵, 迭代求解, 加性许瓦兹方法, 能量方程

Abstract: We present a variant restricted Additive Schwarz preconditioner and apply Partial-Newton-Krylov-Schwarz algorithm to solve nonlinear algebraic equations of two-dimensional three-temperature systems. Iteration and CPU time for convergence are decreased. Numerical results show efficiency of the method.

Key words: parallel implementation, preconditioner, iterative solution, additive Schwarz mesh methods, energy equations

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