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首页> 外文期刊>International journal of numerical modelling >A three-dimensional mesh refinement algorithm with low boundary reflections for the finite-difference time-domain simulation of metallic structures
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A three-dimensional mesh refinement algorithm with low boundary reflections for the finite-difference time-domain simulation of metallic structures

机译:低边界反射的三维网格细化算法,用于金属结构的时域有限差分模拟

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摘要

We present a method for including areas of high grid density into a general grid for the finite-difference time-domain method in three dimensions. Reflections occurring at the boundaries separating domains of different grid size are reduced significantly by introducing appropriate interpolation methods for missing boundary points. Several levels of refinement can be included into one calculation using a hierarchical refinement architecture. The algorithm is implemented with an auxiliary differential equation technique that allows for the simulation of metallic structures. We illustrate the performance of the algorithm through the simulation of metal nano-particles included in a coarser grid and by investigating gold optical antennas.
机译:我们提出了一种在三维空间中将有限网格时域方法包括在高网格密度的区域中的方法,该方法将其包含在普通网格中。通过为丢失的边界点引入适当的插值方法,可以大大减少发生在将不同网格大小的畴分开的边界处的反射。使用分层细化体系结构,可以将几个细化级别包括在一个计算中。该算法通过辅助微分方程技术实现,该技术可以模拟金属结构。我们通过模拟包含在较粗网格中的金属纳米粒子并研究金光学天线来说明算法的性能。

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