Hybrid FDTD algorithm for electromagnetic analysis of fine structures

A new hybrid Finite-Difference Time-Domain (hybrid FDTD) algorithm is proposed in this paper. This hybrid FDTD method combines the superiorities of explicit unconditionally stable FDTD (US-FDTD) and traditional FDTD methods to achieve unconditional stability and high calculation efficiency. US-FDTD...

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Autores principales:	Sihan Zhao, Bing Wei, Xinbo He, Yiwen Li, Xiaolong Wei
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Finite-Difference Time-Domain (FDTD) Unconditionally stable Explicit Hybrid FDTD Unstable modes Physics QC1-999
Acceso en línea:	https://doaj.org/article/d9c7eb4c209143aca2972a8086a0acec
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spelling	oai:doaj.org-article:d9c7eb4c209143aca2972a8086a0acec2021-11-26T04:28:11ZHybrid FDTD algorithm for electromagnetic analysis of fine structures2211-379710.1016/j.rinp.2021.105017https://doaj.org/article/d9c7eb4c209143aca2972a8086a0acec2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2211379721010159https://doaj.org/toc/2211-3797A new hybrid Finite-Difference Time-Domain (hybrid FDTD) algorithm is proposed in this paper. This hybrid FDTD method combines the superiorities of explicit unconditionally stable FDTD (US-FDTD) and traditional FDTD methods to achieve unconditional stability and high calculation efficiency. US-FDTD is used in fine grids and the adjacent coarse grids subdomain and it breaks the Courant-Friedrich-Levy (CFL) condition. Traditional FDTD is used in the remaining coarse grids subdomain and it is a matrix free method. A compensation scheme is used on the subdomain boundary without compromising accuracy. Hybrid FDTD makes the explicit time marching with a uniform time step determined by the size of coarse grid in whole domain, which reduces the iteration time. In addition, because US-FDTD is only used in one of the subdomains, compared with global US-FDTD method, the matrix dimension of hybrid FDTD is reduced, which saves the time for eigenvalue solution. Numerical results show high efficiency and accuracy of the proposed method.Sihan ZhaoBing WeiXinbo HeYiwen LiXiaolong WeiElsevierarticleFinite-Difference Time-Domain (FDTD)Unconditionally stableExplicitHybrid FDTDUnstable modesPhysicsQC1-999ENResults in Physics, Vol 31, Iss , Pp 105017- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Finite-Difference Time-Domain (FDTD) Unconditionally stable Explicit Hybrid FDTD Unstable modes Physics QC1-999
spellingShingle	Finite-Difference Time-Domain (FDTD) Unconditionally stable Explicit Hybrid FDTD Unstable modes Physics QC1-999 Sihan Zhao Bing Wei Xinbo He Yiwen Li Xiaolong Wei Hybrid FDTD algorithm for electromagnetic analysis of fine structures
description	A new hybrid Finite-Difference Time-Domain (hybrid FDTD) algorithm is proposed in this paper. This hybrid FDTD method combines the superiorities of explicit unconditionally stable FDTD (US-FDTD) and traditional FDTD methods to achieve unconditional stability and high calculation efficiency. US-FDTD is used in fine grids and the adjacent coarse grids subdomain and it breaks the Courant-Friedrich-Levy (CFL) condition. Traditional FDTD is used in the remaining coarse grids subdomain and it is a matrix free method. A compensation scheme is used on the subdomain boundary without compromising accuracy. Hybrid FDTD makes the explicit time marching with a uniform time step determined by the size of coarse grid in whole domain, which reduces the iteration time. In addition, because US-FDTD is only used in one of the subdomains, compared with global US-FDTD method, the matrix dimension of hybrid FDTD is reduced, which saves the time for eigenvalue solution. Numerical results show high efficiency and accuracy of the proposed method.
format	article
author	Sihan Zhao Bing Wei Xinbo He Yiwen Li Xiaolong Wei
author_facet	Sihan Zhao Bing Wei Xinbo He Yiwen Li Xiaolong Wei
author_sort	Sihan Zhao
title	Hybrid FDTD algorithm for electromagnetic analysis of fine structures
title_short	Hybrid FDTD algorithm for electromagnetic analysis of fine structures
title_full	Hybrid FDTD algorithm for electromagnetic analysis of fine structures
title_fullStr	Hybrid FDTD algorithm for electromagnetic analysis of fine structures
title_full_unstemmed	Hybrid FDTD algorithm for electromagnetic analysis of fine structures
title_sort	hybrid fdtd algorithm for electromagnetic analysis of fine structures
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d9c7eb4c209143aca2972a8086a0acec
work_keys_str_mv	AT sihanzhao hybridfdtdalgorithmforelectromagneticanalysisoffinestructures AT bingwei hybridfdtdalgorithmforelectromagneticanalysisoffinestructures AT xinbohe hybridfdtdalgorithmforelectromagneticanalysisoffinestructures AT yiwenli hybridfdtdalgorithmforelectromagneticanalysisoffinestructures AT xiaolongwei hybridfdtdalgorithmforelectromagneticanalysisoffinestructures
_version_	1718409933267927040

Hybrid FDTD algorithm for electromagnetic analysis of fine structures

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