Multilevel Space-Time Additive Schwarz Methods for Parabolic Equations
Multilevel Space-Time Additive Schwarz Methods for Parabolic Equations
复制标题
抛物线方程的多级时空加性SCHWARZ方法
DOI:
10.1137/17m113808x
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发表时间:
2018-09
影响因子:
3.1
通讯作者:
Cai Xiao Chuan
中科院分区:
文献类型:
--
作者:
Li Shishun;Shao Xinping;Cai Xiao Chuan
In this paper, we present a multilevel space-time additive Schwarz method for solving linear system of equations arising from the discretization of parabolic equations. With this method, the problem is solved in parallel on both space and time dimensions. After establishing two important properties of the space and time decomposition, i.e., a strengthened Cauchy--Schwarz-type inequality and a stable multilevel decomposition under a space-time energy norm, we develop an optimal convergence theory in $R^2$ and $R^3$ and show how the convergence rate depends on the mesh sizes, the number of subdomains, the window size, and the number of levels. Numerical experiments carried out on a parallel computer with thousands of processors for two- and three-dimensional problems confirm the theory in terms of the number of iterations, as well as the strong and weak scalabilities. Furthermore, a detailed comparison shows that the space-time method outperforms the traditional time stepping method, parallelized only in sp...
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10.1109/tcad.1982.1270004
发表时间:
1982-07
影响因子:
2.9
作者:
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影响因子:
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影响因子:
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DOI:
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发表时间:
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期刊:
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影响因子:
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