An analysis of HDG methods for convection-dominated diffusion problems
ESAIM: Mathematical Modelling and Numerical Analysis , Tome 49 (2015) no. 1, pp. 225-256.

We present the first a priori error analysis of the h-version of the hybridizable discontinuous Galkerin (HDG) methods applied to convection-dominated diffusion problems. We show that, when using polynomials of degree no greater than k, the L 2 -error of the scalar variable converges with order k+1/2 on general conforming quasi-uniform simplicial meshes, just as for conventional DG methods. We also show that the method achieves the optimal L 2 -convergence order of k+1 on special meshes. Moreover, we discuss a new way of implementing the HDG methods for which the spectral condition number of the global matrix is independent of the diffusion coefficient. Numerical experiments are presented which verify our theoretical results.

Reçu le :
DOI : 10.1051/m2an/2014032
Classification : 65N30
Mots clés : HDG, convection-dominated diffusion
Fu, Guosheng 1 ; Qiu, Weifeng 2 ; Zhang, Wujun 3

1 School of Mathematics, University of Minnesota, Minneapolis, MN 55455, USA.
2 Department of Mathematics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, P.R. China.
3 Department of Mathematics, University of Maryland, College Park, MD 20742-4015, USA.
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Fu, Guosheng; Qiu, Weifeng; Zhang, Wujun. An analysis of HDG methods for convection-dominated diffusion problems. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 49 (2015) no. 1, pp. 225-256. doi : 10.1051/m2an/2014032. http://archive.numdam.org/articles/10.1051/m2an/2014032/

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