A modified dimensional split preconditioner for generalized saddle point problems

A modified dimensional split preconditioner for generalized saddle point problems
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用于广义鞍点问题的改进维数分裂预处理器

DOI:
10.1016/j.cam.2013.02.017
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发表时间:
2013-10
影响因子:
2.4
通讯作者:
Jiang, Mei-Qun
Jiang, Mei-Qun
中科院分区:
数学2区
文献类型:
--
作者:
Cao, Yang;Yao, Lin-Quan;Jiang, Mei-Qun

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对于二维线性化Navier-Stokes方程的大型稀疏鞍点线性方程组,Benzi和Guo最近研究了一种维数分裂(DS)预条件子(Appl. Numer. 61(2011)66-76)。将其进一步应用于广义鞍点问题,提出了一种改进的维数分裂预条件子。这种新的预条件子是基于广义鞍点矩阵的分裂,从而导致无条件收敛的不动点迭代。基本的迭代是加速的Krylov子空间方法,如重新启动GMRES。讨论了MDS预条件子的实现,并分析了一个类似的情况。最后,数值实验的模型Navier-Stokes问题的MDS预条件的有效性。
For large and sparse saddle point linear systems arising from 2D linearized Navier–Stokes equations, Benzi and Guo recently studied a dimensional split (DS) preconditioner (Appl. Numer. Math. 61 (2011) 66–76). By further applying it to generalized saddle point problems, in this paper we present a modified dimensional split (MDS) preconditioner. This new preconditioner is based on a splitting of the generalized saddle point matrix, resulting in an unconditional convergent fixed-point iteration. The basic iteration is accelerated by a Krylov subspace method like restarted GMRES. The implementation of the MDS preconditioner is discussed and a similar case is also analyzed. Finally, numerical experiments of a model Navier–Stokes problem are presented to illustrate the effectiveness of the MDS preconditioner.
DOI: 10.1137/s0895479899351805
发表时间: 2000-03
期刊: SIAM J. Matrix Anal. Appl.
影响因子: --
作者:
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