计算物理 ›› 2011, Vol. 28 ›› Issue (6): 835-842.

• 研究论文 • 上一篇    下一篇

磁场与流场耦合问题中Newton-Laphson方法的收敛性分析(英文)

王金铭, 曲绍波, 于波   

  1. 1. 沈阳工业大学, 沈阳 110023;
    2. 大连理工大学, 大连 116024
  • 收稿日期:2010-11-25 修回日期:2011-04-14 出版日期:2011-11-25 发布日期:2011-11-25
  • 作者简介:王金铭(1964-),male,Ph.D,professor,research in analysis of coupled physics fields.E-mail:wangjm_2004@163.Com
  • 基金资助:
    Supported by Liaoning Natural Science Foundation(Grant No.20092051);Scientific and Technologic Research Project of Educational Department of Liaoning Province(Grant No.L2010388)

Convergence Analysis of Newton-Laphson's Method for Coupled Magnetic and Flow Fields

WANG Jinming, QU Shaobo, YU Bo   

  1. 1. Shenyang University of Technology, Shenyang 110023, China;
    2. Dalian University of Technology, Dalian 116024, China
  • Received:2010-11-25 Revised:2011-04-14 Online:2011-11-25 Published:2011-11-25

摘要: 针对磁场与流场耦合问题的数值分析,提出并证明求解离散化过程所得到的非线性方程组牛顿-拉夫逊方法的-类局部收敛性条件.这-条件不仅给出了时间步长与空间步长、拟压缩因子等之间的关系,而且为数值求解磁场与流场耦合问题的牛顿-拉夫逊方法收敛性提供了理论依据.数值算例表明时间步长的实际取值要比理论值偏大.

关键词: 耦合问题, 磁场与流场, 有限体积法, 局部收敛, Newton-Laphson方法

Abstract: A local convergence condition of Newton-Laphson's method in solving diseretization nonlinear equation8 of coupled problems is shown and proved.It gives out relation among time-step and space.step and quasi.compres8ion factor. And it provides theoretically an assurance for convergence of Newton.Laphson's method within numerical analysis. Numerical example shows that the time-step in actual calculating can be greater than theoretical value 5lightly.

Key words: coupled problem, magnetic and flow fields, finite volume method, local convergence, Newton-Laphson's method

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