计算物理 ›› 2003, Vol. 20 ›› Issue (4): 326-330.

• 论文 • 上一篇    下一篇

时域有限差分法中电磁场的吸收边界条件

徐涵, 常文蔚, 银燕   

  1. 国防科技大学理学院, 湖南 长沙 410073
  • 收稿日期:2002-05-21 修回日期:2003-01-02 出版日期:2003-07-25 发布日期:2003-07-25
  • 作者简介:徐涵(1972-),男,江苏宜兴,讲师,博士,从事激光与等离于体相互作用研究.
  • 基金资助:
    国家自然基金(No.10085002);国家高技术惯性约束聚变主题资助项目

Absorption Boundary Condition of the Electromagnetic Wave in the Finite-difference Time-domain Method

XU Han, CHANG Wen-wei, YIN Yan   

  1. Science Institute, National University of Defence and Technology, Changsha 410073, China
  • Received:2002-05-21 Revised:2003-01-02 Online:2003-07-25 Published:2003-07-25

摘要: 吸收边界条件在时域有限差分法计算电磁场中有着广泛的应用,从吸收边界所要满足的条件出发,将Lindman吸收边界条件推广,得到了便于计算的简化形式.两维数值模拟结果表明:以各种角度向左或右传播的p极化和s极化电磁波在边界面上的反射率均低于0.5%.

关键词: 时域有限差分, 吸收边界条件

Abstract: The Lindman's absorption boundary condition, which has been widely used in the FDTD method, is generalized to a special form suitable to the electromagnetic field calculation from the starting point of the absorption principle. Our 2D numerical simulations indicate that the P-polarized and S-polarized electromagnetic waves with a wide varity of incident angles can be well absorbed by left and right boundaries. The reflectivity of the electromagnetic energy at either boundary is less than 0.5%.

Key words: time domain finite difference, absorption boundary condition

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