一种新的角点和边棱处理方法

A new processing method of vertex and edge

角点和边棱的处理对时域有限差分法(FDTD)的计算结果影响很大.本文提出了一种新的角点和边棱处理方法,其基本原理是:角点和边棱在三个或两个方向上引起反射,因此可从三个或两个方向上消除反射.该方法具有计算精度易于提高和程序实现简单等优点.数值实验证实了该方法的有效性.

The processing method of vertex and edge affects the results of FDTD heavily. In this paper, a new processing method of vertex and edge is brought forward. The fundamental principle of the method is that vertex and edge cause numerical reflection in 3 or 2 directions, and so the numerical reflection should be eliminated in 3 or 2 directions. The advantages of the method are computational accuracy which is easy to be bettered, simple program, and so on. The validity of the method is verified by numerical experiments.