An agglomeration-based massively parallel non-overlapping additive Schwarz preconditioner for high-order discontinuous Galerkin methods on polytopic grids
An agglomeration-based massively parallel non-overlapping additive Schwarz preconditioner for high-order discontinuous Galerkin methods on polytopic grids
复制标题
多面体网格上基于团聚的大规模并行非重叠加性 Schwarz 预处理器高阶不连续 Galerkin 方法
DOI:
10.1090/mcom/3510
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发表时间:
2020
影响因子:
2
通讯作者:
Antonietti P
中科院分区:
文献类型:
--
作者:
Antonietti P
In this article we design and analyze a class of two-level non-overlapping additive Schwarz preconditioners for the solution of the linear system of equations stemming from discontinuous Galerkin discretizations of second-order elliptic partial differential equations on polytopic meshes. The preconditioner is based on a coarse space and a non-overlapping partition of the computational domain where local solvers are applied in parallel. In particular, the coarse space can potentially be chosen to be non-embedded with respect to the finer space; indeed it can be obtained from the fine grid by employing agglomeration and edge coarsening techniques. We investigate the dependence of the condition number of the preconditioned system with respect to the diffusion coefficient and the discretization parameters, ie, the mesh size and the polynomial degree of the fine and coarse spaces. Numerical examples are presented which confirm the theoretical bounds. References
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影响因子:
2.5
作者:
Iain Smears
通讯作者:
Iain Smears
DOI:
--
发表时间:
2016
期刊:
IEEE CSE 2016
影响因子:
--
作者:
P. Antonietti;A. Cangiani;Joe Collis;Zhaonan Dong;E. Georgoulis;Stefano Giani;P. Houston
通讯作者:
P. Houston
DOI:
10.1016/j.cma.2019.112634
发表时间:
2018-03
影响因子:
7.2
作者:
P. Antonietti;F. Bonaldi;I. Mazzieri
通讯作者:
P. Antonietti;F. Bonaldi;I. Mazzieri
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
S. Sauter;R. Warnke
通讯作者:
R. Warnke
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
P. Antonietti;F. Brezzi;L. D. Marini
通讯作者:
L. D. Marini