期刊
JOURNAL OF SCIENTIFIC COMPUTING
卷 70, 期 2, 页码 608-630出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10915-016-0259-9
关键词
Discontinuous Galerkin method; High-order discretizations; Uniform preconditioning
资金
- Center for Computational Mathematics and Applications (CCMA) at the Mathematics Department, Penn State
- NSF [DMS-1418843, DMS-1522615]
- SIR Project - MIUR [RBSI14VT0S]
- Direct For Mathematical & Physical Scien
- Division Of Mathematical Sciences [1522615, 1418843] Funding Source: National Science Foundation
In this paper we design and analyze a uniform preconditioner for a class of high-order Discontinuous Galerkin schemes. The preconditioner is based on a space splitting involving the high-order conforming subspace and results from the interpretation of the problem as a nearly-singular problem. We show that the proposed preconditioner exhibits spectral bounds that are uniform with respect to the discretization parameters, i.e., the mesh size, the polynomial degree and the penalization coefficient. The theoretical estimates obtained are supported by numerical tests.
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