Asymptotic Solutions for High Frequency Helmholtz Equations in Anisotropic Media with Hankel Functions
Asymptotic Solutions for High Frequency Helmholtz Equations in Anisotropic Media with Hankel Functions
复制标题
具有 Hankel 函数的各向异性介质中高频亥姆霍兹方程的渐近解
DOI:
10.1007/s10915-019-00957-8
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发表时间:
2019
影响因子:
2.5
通讯作者:
Luo, Songting
中科院分区:
文献类型:
--
作者:
Jacobs, Matthew;Luo, Songting
We present asymptotic methods for solving high frequency Helmholtz equations in anisotropic media. The methods are motivated by Babich’s expansion that uses Hankel functions of the first kind to approximate the solution of high frequency Helmholtz equation in isotropic media. Within Babich’s expansion, we can derive the anisotropic eikonal equation and a recurrent system of transport equations to determine the phase and amplitude terms of the wave, respectively. In order to reconstruct the wave with the phase and amplitude terms for any high frequencies, they must be computed with high-order accuracy, for which a high-order factorization approach based on power series expansions at the primary source is applied first to resolve the source singularities, after that high-order schemes can be implemented efficiently. Rigorous formulations are derived, and numerical examples are presented to demonstrate the methods.
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DOI:
10.1016/j.jcp.2014.03.066
发表时间:
2014
期刊:
J. Comput. Phys.
影响因子:
--
作者:
S. Luo;J. Qian;R. Burridge
通讯作者:
R. Burridge
影响因子:
0.9
作者:
Benamou;Songting;Luo;Hongkai;Zhao
通讯作者:
Zhao
DOI:
10.1016/0041-5553(65)90021-2
发表时间:
1965
期刊:
Ussr Computational Mathematics and Mathematical Physics
影响因子:
--
作者:
V. M. Babich
通讯作者:
V. M. Babich
DOI:
10.1137/120901696
发表时间:
2014
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
S. Luo;J. Qian;R. Burridge
通讯作者:
R. Burridge
影响因子:
2.5
作者:
J. Qian;L. Yuan;Yuan Liu;S. Luo;R. Burridge
通讯作者:
R. Burridge