基于正交轨迹的共形PML数值仿真方法

从材料的观点看,完全匹配层是各向异性的介质.场在完全匹配层遵从麦克斯韦方程.通过设计磁导率和介电常数张量参数来实现任意形状的共形完全匹配层.为匹配层动态稳定,可应用二维正交轨迹网格和FDTD方法实现了数值共形完全匹配层仿真,数值仿真结果表明基于正交轨迹网格的共形完全匹配层为一个共形FDTD或FEM方法提供了一个有效地吸收边界条件.

Numerical Simulation of Conformal PML Based on Orthogonal Trajectory Method

As viewed from the material, the perfectly matched layer (PML) is an anisotropic media, and the fields in the PML obey Maxell' equations. Progress in metamatefial design and fabrication has provided further impe-tus to study such constitutive tensor blueprints. This paper presents an application of a two-dimensional orthogonal trajectory grid generation scheme for the numerical implementation of a conformal PML in conjunction with FDTD method. Numerical results show that orthogonal trajectory grid-based conformal PML implementation provides an ef-ficient absorbing boundary condition for a body-conformal FDTD or FEM simulation involving complex geometries.