基于MEI方法的贴体网格FDTD方法
中图分类号:

TN011 O241.3

基金项目:

国家自然科学基金 (编号 6 99710 2 1),国家“86 3”计划基金 (编号 99-0 4)资助项目~~

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    摘要:

    利用Thompson变换在任意形状的散射体外部产生共形的外部计算网络,并使FDTD计算区域的截断边界与散射体边界形状完全一致,时域不变性测试方程(MEI)方法被作为该截断边界上的局域吸收边界条件,从而大大压缩了FDTD的计算空间。数值试验结果证实,该方法可在不降低计算精度的前提下减少计算机内存需求。

    Abstract:

    The finite difference time domain (FDTD) computational zone was truncated by an artificial boundary, of which the geometric shape was conformal with the boundary of an arbitrary shaped scatterer. The external conformal mesh was generated by the Thompson transformation.On the truncating boundary, the time domain measured equations of invariance (MEI) were applied as a local absorbing boundary condition. So the FDTD computational domain was compressed remarkably. The numerical experiment proved that the requirement of computer storage is reduced while the numerical accuracy is not decreased.

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廖成.基于MEI方法的贴体网格FDTD方法[J].红外与毫米波学报,2001,20(6):442~446]. LIAO Cheng.[J]. J. Infrared Millim. Waves,2001,20(6):442~446.]

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