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首页> 外文期刊>Journal of Computational Physics >Incorporating the Havriliak-Negami dielectric model in the FD-TD method
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Incorporating the Havriliak-Negami dielectric model in the FD-TD method

机译:将Havriliak-Negami介电模型纳入FD-TD方法

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摘要

We derive and analyze an efficient algorithm to incorporate the anomalously dispersive Havriliak-Negami dielectric model of induced polarization in the Finite-difference time-domain (FD-TD) method. Our algorithm implements this dielectric model, which in the time-domain involves fractional derivatives and fractional differential operators, with a preset error over the desired computational time interval [0,Tcomp] and correctly takes into account the singularity at t=0+ of the corresponding time-domain dielectric susceptibility. The overall algorithm is shown to be second-order accurate in space and time, and to obey the standard FD-TD stability condition. Numerical experiments confirm our analysis.
机译:我们导出并分析一种有效算法,以有限差分时域(FD-TD)方法结合感应极化的异常色散Havriliak-Negami介电模型。我们的算法实现了这种介电模型,该模型在时域中包含分数导数和分数微分算子,并在所需的计算时间间隔[0,Tcomp]内具有预设误差,并正确考虑了t = 0 +时的奇点。相应的时域介电常数。整体算法在时空上具有二阶精度,并且符合标准FD-TD稳定性条件。数值实验证实了我们的分析。

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