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Flux-upwind stabilization of the discontinuous Petrov–Galerkin formulation with Lagrange multipliersfor advection-diffusion problems

Published online by Cambridge University Press:  15 November 2005

Paola Causin
Affiliation:
INRIA Rocquencourt, Domaine de Voluceau, Rocquencourt BP 105, 78153 Le Chesnay Cedex, France
Riccardo Sacco
Affiliation:
Dipartimento di Matematica “F. Brioschi”, Politecnico di Milano, via Bonardi 9, 20133 Milano, Italy. riccardo.sacco@mate.polimi.it
Carlo L. Bottasso
Affiliation:
D. Guggenheim School of Aerospace Engineering, Georgia Institute of Technology, 270 Ferst Dr., 30332 Atlanta GA, USA
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Abstract

In this work we consider the dual-primal Discontinuous Petrov–Galerkin (DPG) method for the advection-diffusion model problem. Since in the DPG method both mixed internal variables are discontinuous,a static condensation procedure can becarried out, leading to a single-field nonconformingdiscretization scheme. For this latter formulation,we propose a flux-upwind stabilization technique to deal with the advection-dominated case. The resulting scheme is conservative and satisfies a discrete maximum principle under standard geometrical assumptions on the computational grid. A convergence analysis isdeveloped, proving first-order accuracy of the method in a discrete H 1-norm, and the numerical performance of the scheme is validated on benchmark problems with sharp internal and boundary layers.

Type
Research Article
Copyright
© EDP Sciences, SMAI, 2005

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