Stretched-coordinate PML in 2D TLM simulations
Stretched-coordinate PML in 2D TLM simulations
复制标题
二维 TLM 模拟中的拉伸坐标 PML
DOI：
10.1049/iet-smt.2019.0340
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Odeyemi J
中科院分区：
文献类型：
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作者：
Odeyemi J
针对二维传输线建模（TLM）方法，提出了一种新的拉伸坐标完美匹配层（PML）实现方法。该公式提供了一种统一的方法，并基于TLM节点到复杂拉伸域的映射，其中详细阐述了组成RLC传输线组件的最终转换。该转换被证明可以修改TLM连接-散射算法。通过模拟典型波导测试用例验证了其吸收性能。与现有的基于分裂场的TLM - PML实现（更适合于无损媒体）不同，得到的数值结果表明，所提出的PML公式在有损和无损媒体的终止中都是有效的。
A novel implementation of the stretched coordinate perfectly matched layer (PML) is presented for the two‐dimensional (2D) transmission line modelling (TLM) method. The formulation offers a unified approach and is based on the mapping of the TLM node to a complex stretched domain for which the resulting transformation of the constituent RLC transmission line components is elaborated. The transformation is shown to modify the TLM connect‐scatter algorithm. The absorption performance is demonstrated by simulating a canonical waveguide test case. Unlike the existing split‐field based TLM‐PML implementations, which are better suited to lossless media, the numerical results obtained show the proposed PML formulation is effective in the termination of both lossy and lossless media.