Comparisons of three kinds of plane wave methods for the Helmholtz equation and time-harmonic Maxwell equations with complex wave numbers

Comparisons of three kinds of plane wave methods for the Helmholtz equation and time-harmonic Maxwell equations with complex wave numbers
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复波数亥姆霍兹方程和时谐麦克斯韦方程的三种平面波方法比较

DOI:
10.1016/j.cam.2018.05.024
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发表时间:
2018-12
影响因子:
2.4
通讯作者:
Hu Qiya
Hu Qiya
中科院分区:
数学2区
文献类型:
--
作者:
Yuan Long;Hu Qiya

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本文研究了复波数Helmholtz方程和时谐麦克斯韦方程的几种平面波离散方法。我们设计了两个新的变种的变分理论的复射线和超弱变分公式的离散这些类型的方程,分别。这两种方法产生的近似解的适定性。此外,在Hu和Yuan(2018)介绍的PWLS-LSFE方法的基础上,我们将这两种方法(VTCR方法和UWVF方法)与局部谱元相结合进行了扩展,以离散非齐次Helmholtz方程和麦克斯韦方程。数值结果表明,由UWVF方法产生的近似解明显比由VTCR方法产生的更准确。
In this paper we are concerned with some plane wave discretization methods of the Helmholtz equation and time-harmonic Maxwell equations with complex wave numbers. We design two new variants of the variational theory of complex rays and the ultra weak variational formulation for the discretization of these types of equations, respectively. The well posedness of the approximate solutions generated by the two methods is derived. Moreover, based on the PWLS–LSFE method introduced in Hu and Yuan (2018), we extend these two methods (VTCR method and UWVF method) combined with local spectral element to discretize nonhomogeneous Helmholtz equation and Maxwell’s equations. The numerical results show that the resulting approximate solution generated by the UWVF method is clearly more accurate than that generated by the VTCR method.
DOI: 10.1142/s0218396x03001912
发表时间: 2003-06
影响因子: --
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