Multigrid FDTD with Chombo

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• 作者：Zdzisł ; aw Meglicki ; Stephen K. Gray ; Boyana Norris
• 关键词：Finite-difference methods ; Multigrid methods ; Adaptive mesh refinement ; Wave optics ; Nanoscale structures ; Nanophotonics ; Multiscale simulations
• 刊名：Computer Physics Communications
• 出版年：2007
• 出版时间：15 January 2007
• 年：2007
• 卷：176
• 期：2
• 页码：109-120
• 全文大小：753 K

文摘

We describe a parallel, multiscale, multigrid, finite-difference time-domain (FDTD) code for simulating electromagnetic wave propagation in two-dimensional systems involving Lorentz and Drude media. We compare multigrid leapfrog time-stepping procedures and analyze the efficacy and scalability of multigrid use in FDTD. We have implemented the code using Chombo, an object-oriented toolkit for finite-difference methods on block-structured, adaptively refined rectangular grids. We discuss the advantages of this high-level approach, as opposed to the direct use of message-passing libraries.