Paper Info
Title
An adaptive composite discontinuous Galerkin method for elliptic problems on complicated domains with discontinuous coefficients.
Abstract
In this paper, we introduce the multi-region discontinuous Galerkin composite finite element method (MRDGCFEM) with hp-adaptivity for the discretization of second-order elliptic partial differential equations with discontinuous coefficients. This method allows for the approximation of problems posed on computational domains where the jumps in the diffusion coefficient form a micro-structure. Standard numerical methods could be used for such problems but the computational effort may be extremely high. Small enough elements to represent the underlying pattern in the diffusion coefficient have to be used. In contrast, the dimension of the underlying MRDGCFE space is independent of the complexity of the diffusion coefficient pattern. The key idea is that the jumps in the diffusion coefficient are no longer resolved by the mesh where the problem is solved; instead, the finite element basis (or shape) functions are adapted to the diffusion pattern allowing for much coarser meshes. In this paper, we employ hp-adaptivity on a series of test cases highlighting the practical application of the proposed numerical scheme.
Year
DOI
Venue
2020
10.1007/s10444-020-09759-1
Advances in Computational Mathematics
Keywords
Field
DocType
Composite finite element methods, Discontinuous Galerkin methods, Discontinuous coefficients, Adaptivity, 65N30, 65N50
Discontinuous Galerkin method,Mathematical analysis,Composite number,Mathematics
Journal
Volume
Issue
ISSN
46
2
1019-7168
Citations 
PageRank 
References 
0
0.34
0
Authors
1
Name
Order
Citations
PageRank
Stefano Giani1369.55