Discontinuous Galerkin Methods for the Biharmonic Problem

Georgoulis, Emmanuil H. and Houston, Paul Discontinuous Galerkin Methods for the Biharmonic Problem. IMA Journal of Numerical Analysis . (Submitted)

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This work is concerned with the design and analysis of hp-version discontinuous Galerkin (DG) finite element methods for boundary-value problems involving the biharmonic operator. The first part extends the unified approach of Arnold, Brezzi, Cockburn & Marini (SIAM J. Numer. Anal. 39, 5 (2001/02), 1749-1779) developed for the Poisson problem, to the design of DG methods via an appropriate choice of numerical flux functions for fourth order problems; as an example we retrieve the interior penalty DG method developed by Suli & Mozolevski (Comput. Methods Appl. Mech. Engrg. 196, 13-16 (2007), 1851-1863). The second part of this work is concerned with a new a-priori error analysis of the hp-version interior penalty DG method, when the error is measured in terms of both the energy-norm and L2-norm, as well certain linear functionals of the solution, for elemental polynomial degrees $p\ge 2$. Also, provided that the solution is piecewise analytic in an open neighbourhood of each element, exponential convergence is also proven for the p-version of the DG method. The sharpness of the theoretical developments is illustrated by numerical experiments.

Item Type:Article
Additional Information:Article has been accepted for publication in IMA Journal of Numerical Analysis ©: 2007 Institute of Mathematics and its Applications. Published by Oxford University Press [on behalf of IMA]. All rights reserved.
Uncontrolled Keywords:Discontinuous, Galerkin Methods, Biharmonic, finite element methods
Schools/Departments:Faculty of Science > School of Mathematical Sciences
ID Code:671
Deposited By:Houston, Paul
Deposited On:23 Oct 2007 12:10
Last Modified:24 Jun 2011 15:30

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