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OBJECT-FITTED FDTD METHOD BASED ON MEI-ABC
基于MEI方法的贴体网格FDTD方法

Keywords: EM scattering,FDTD method,Thompson,FDTD method,MEI method
电磁散射
,时域有限差分法,Thompson-FDTD方法,MEI方法,截断边界,散射体,计算网格,计算机

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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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