A multigrid-based preconditioned solver for the Helmholtz equation with a discretization by 25-point difference scheme
A multigrid-based preconditioned solver for the Helmholtz equation with a discretization by 25-point difference scheme
复制标题
基于多重网格的亥姆霍兹方程预条件求解器,采用 25 点差分格式离散化
DOI:
10.1016/j.matcom.2015.01.009
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发表时间:
2015-11
影响因子:
4.6
通讯作者:
Tingting Wu
中科院分区:
文献类型:
--
作者:
Dongsheng Cheng;Zhiyong Liu;Tingting Wu
In this paper, a preconditioned iterative method is developed to solve the Helmholtz equation with perfectly matched layer (Helmholtz-PML equation). The complex shifted-Laplacian is generalized to precondition the Helmholtz-PML equation, which is discretized by an optimal 25-point finite difference scheme that we presented in Chen et al. (2011). A spectral analysis is given for the discrete preconditioned system from the perspective of linear fractal mapping, and Bi-CGSTAB is used to solve it. The multigrid method is employed to invert the preconditioner approximately, and a new matrix-based prolongation operator is constructed in the multigrid cycle. Numerical experiments are presented to illustrate the efficiency of the multigrid-based preconditioned Bi-CGSTAB method with the new prolongation operator. Numerical results are also given to compare the performance of the new prolongation operator with that of the prolongation operator based on the algebraic multigrid (AMG) principle.
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影响因子:
3.3
作者:
C. Shin;H. Sohn
通讯作者:
C. Shin;H. Sohn
影响因子:
4.1
作者:
I. Singer;Eli Turkel
通讯作者:
I. Singer;Eli Turkel
影响因子:
3.3
作者:
I. Štekl;R. Pratt
通讯作者:
I. Štekl;R. Pratt
DOI:
10.1137/060661491
发表时间:
2007-09
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
M. Gijzen;Y. Erlangga;C. Vuik
通讯作者:
M. Gijzen;Y. Erlangga;C. Vuik
DOI:
10.1002/nme.1620382203
发表时间:
1995-11
影响因子:
2.9
作者:
F. Ihlenburg;I. Babuska
通讯作者:
F. Ihlenburg;I. Babuska