Numerical dispersion analysis of a multi-symplectic scheme for the three dimensional Maxwell's equations

Numerical dispersion analysis of a multi-symplectic scheme for the three dimensional Maxwell's equations
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三维麦克斯韦方程组多辛格式的数值色散分析

DOI:
10.1016/j.jcp.2012.09.043
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发表时间:
2013-02
影响因子:
4.1
通讯作者:
Song Yongzhong
Song Yongzhong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Cai Wenjun;Wang Yushun;Song Yongzhong

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本文研究了简单介质中三维麦克斯韦方程的多辛格式。这是一个具有多辛结构的偏微分方程组。我们证明了这种多辛格式保持了局部和整体能量守恒定律的离散形式和离散发散。此外,我们还讨论了多辛格式的几个色散性质,包括数值色散关系、数值群速度、大时间步长的影响和CFL条件。
In this paper, we study a multi-symplectic scheme for three dimensional Maxwell’s equations in a simple medium. This is a system of PDEs with multi-symplectic structures. We prove that this multi-symplectic scheme preserves the discrete version of local and global energy conservation law and the discrete divergence. Furthermore, we extend the discussion to several dispersion properties of the multi-symplectic scheme including the numerical dispersion relation, the numerical group velocity, the effect of large time steps and the CFL condition.
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