Year: 2019
Author: Siu Wun Cheung, Eric T. Chung
International Journal of Numerical Analysis and Modeling, Vol. 16 (2019), Iss. 2 : pp. 255–275
Abstract
In this paper, we present an embedded staggered discontinuous Galerkin method for the convection-diffusion equation. The new method combines the advantages of staggered discontinuous Galerkin (SDG) and embedded discontinuous Galerkin (EDG) method, and results in many good properties, namely local and global conservations, free of carefully designed stabilization terms or flux conditions and high computational efficiency. In applying the new method to convection-dominated problems, the method provides optimal convergence in potential and suboptimal convergence in flux, which is comparable to other existing DG methods, and achieves $L$2 stability by making use of a skew-symmetric discretization of the convection term, irrespective of diffusivity. We will present numerical results to show the performance of the method.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/2019-IJNAM-12803
International Journal of Numerical Analysis and Modeling, Vol. 16 (2019), Iss. 2 : pp. 255–275
Published online: 2019-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 21
Keywords: Embedded method staggered discontinuous Galerkin method convection-diffusion equation.