A lattice Boltzmann model for electromagnetic waves propagating in a one-dimensional dispersive medium

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题名:	A lattice Boltzmann model for electromagnetic waves propagating in a one-dimensional dispersive medium
作者:	何正榮;Chen, Poting;Wang, Chen-Hao;Ho, Jeng-Rong
贡献者:	工學院機械工程學系
关键词:	Computer simulation;Debye model;Dispersive medium;Drude model;Electromagnetic waves;Lattice Boltzmann method;Lorentz model
日期:	2013-03-01
上传时间:	2026-04-23 14:38:11 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： A first-order extended lattice Boltzmann (LB) model with special forcing terms for one-dimensional Maxwell equations exerting on a dispersive medium, described either by the Debye or Drude model, is proposed in this study. The time dependent dispersive effect is obtained by the inverse Fourier transform of the frequency-domain permittivity and is incorporated into the LB evolution equations via equivalent forcing effects. The Chapman–Enskog multi-scale analysis is employed to ensure that proposed scheme is mathematically consistent with the targeted Maxwell’s equations at the macroscopic limit. Numerical validations are executed through simulating four representative cases to obtain their LB solutions and compare those with the analytical solutions and existing numerical solutions by finite difference time domain (FDTD). All comparisons show that the differences in numerical values are very small. The present model can thus accurately predict the dispersive effects, and demonstrate first order convergence. In addition to its accuracy, the proposed LB model is also easy to implement. Consequently, this new LB scheme is an effective approach for numerical modeling of EM waves in dispersive media. 出版者： Elsevier Ltd 出版日期： 2013-03 出處： Computers & mathematics with applications (1987), 2013-03, Vol.65 (6), p.961-973 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2013 Elsevier Ltd 識別號： ISSN: 0898-1221 識別號： EISSN: 1873-7668 識別號： DOI: 10.1016/j.camwa.2013.01.014
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