Estimations a posteriori d'un schéma de volumes finis pour un problème non linéaire. (A posteriori estimates of a finite volume scheme for a nonlinear problem.)
type: Item
instance of: scholarly article
title: Estimations a posteriori d'un schéma de volumes finis pour un problème non linéaire. (A posteriori estimates of a finite volume scheme for a nonlinear problem.)
zbMATH Open document ID: 1033.65095
author: A. Bergam
author: Zoubida Mghazli
author: Rüdiger Verfürth
published in: Numerische Mathematik
publication date: 2003-11-09T00:00:00Z
review text: Consider problem (P): Find \(u\in H^1(\Omega)\), solution of \(-\)div\((K(u)\nabla u)=f\) in the open bounded set \(\Omega\in \mathbb R^2\) for a given function \(f\in L^2(\Omega)\), with \(u=0\) on the Lipschitzian boundary \(\Gamma\), where \(K:\mathbb R\rightarrow \mathbb R\) is a nonlinear mapping such that, for all \(s\in \mathbb R\), \(0<\delta\leq K(s)\leq\alpha\) and \(| K'(s)| \leq\beta\), where \(\delta\), \(\alpha\) and \(\beta\) are constants. Consider also hypothesis (H): \(\sum_{\gamma\subset\partial V} | \gamma| \Phi(u_V^{ext},u_V^{int},n_\gamma)=\int_{\partial V}K(u_T)\nabla u_T\cdot n_V\,ds\) on the numerical flux function \(\Phi\). The authors obtain a posteriori estimates of the error in approximating problem (P) by a finite volume method. These estimators are based on a reliable and efficient error indicator under hypothesis (H). This indicator is written in terms of the residual of the partial differential equation (PDE) in its strong form in every intersection between an element of the primal mesh and an element of the dual mesh and in terms of the jumps of the principal part of the PDE across the element boundaries. This indicator can be applied to an arbitrary numerical flux function \(\phi\) if one can construct an interpolant \(u_T\) from the values \(u_V\) which verifies (H). This estimator can be used as a criterion for a mesh adaptation technique. The techniques developed in this work can be adapted to vertex-centered finite volume discretizations.
reviewed by: Rémi Vaillancourt
Mathematics Subject Classification ID: 65N15
Mathematics Subject Classification ID: 65N30
Mathematics Subject Classification ID: 35J65
zbMATH DE Number: 2001636
zbMATH Keywords: a posteriori error estimate
zbMATH Keywords: finite volume scheme
zbMATH Keywords: nonlinear elliptic equation
zbMATH Keywords: vertex-centered finite volume discretization
zbMATH Keywords: mesh adaptation
MaRDI profile type: Publication
full work available at URL: s00211-003-0460-2
OpenAlex ID: W2082865151
DOI: 10.1007/S00211-003-0460-2
description: scientific article; zbMATH DE number 2001636