上海大学学报(自然科学版)

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—维非线性Maxwell方程的多区域Legendre tau方法

姚佳倩,马和平   

  1. 上海大学 理学院,上海200444
  • 收稿日期:2020-10-20
  • 通讯作者: 马和平(1955--),男,教授,博士生导师,博士, 研究方向为偏微分方程数值解. E-mail:hpma@shu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(11971016)

A multidomain Legendre tau method for 1-D nonlinear Maxwell's equations

YAO Jiaqian, MA Heping   

  1. College of Sciences, Shanghai University,Shanghai 200444,China
  • Received:2020-10-20

摘要: 以一维非线性Maxwell方程为模型,针对非一致介质时交界处弱间断和间断两种情况,研究了多区域Legendre tau方法,时间离散采用leapfrog-Crank-Nicolson三层格式,显隐结合提高了算法的稳定性和求解效率;证明了格式的稳定性,并获得按L2-模的最优阶误差估计。数值算例验证了多区域Legendre tau方法对于该非线性间断问题的有效性。

关键词: 非线性Maxwell方程, 多区域Legendre tau方法, 稳定性, 收敛性

Abstract: Taking the 1-D nonlinear Maxwell equation as a model, the multidomain Legendre tau method is studied for the cases of weak discontinuity and discontinuity at the interface of nonhomogeneous media. The leapfrog-Crank-Nicolson scheme is used for time discretization, which is a three-level explicit-implicit method of good stability and easy implementation. The stability of the scheme is proved, and the L2 -error estimate of optimal order is obtained. Numerical examples show the effectiveness of the proposed multidomain Legendre tau method for such nonlinear discontinuous problems.

Key words: nonlinear Maxwell's equations, multidomain Legendre tau method, stability, convergence

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