Numerical Analysis
Accelerating the method of finite element patches using approximately harmonic functions
[Acceleration de la méthode des patches d'éléments finis en utilisant des fonctions approximativement harmoniques]
Comptes Rendus. Mathématique, Tome 345 (2007) no. 2, pp. 107-112.

Nous présentons une nouvelle variante de la méthode de décomposition de domaines avec un recouvrement complet et des maillages non nécessairement emboîtés pour la résolution numérique des problèmes elliptiques avec des données multi-échelle. La nouveauté de la méthode consiste dans la restriction de l'espace des fonctions éléments finis grossières à être des approximations des fonctions harmoniques dans le sous-domaine sur lequel une triangulation fine est appliquée. Des expériences numériques confirment une augmentation du taux de convergence par rapport à une méthode proposée précédemment.

We present a new variant of a domain decomposition method with complete overlap and not necessarily nested grids to solve numerically elliptic problems with multi-scale data. The novelty of the method consists in restricting finite element functions on the coarse grid to be approximately harmonic inside the subdomain where a finer triangulation is applied. Numerical experiments confirm an increase in the convergence rate over a previously proposed method.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crma.2007.06.006
He, Jiwen 1 ; Lozinski, Alexei 1 ; Rappaz, Jacques 2

1 Dept. of Mathematics, University of Houston, 4800 Calhoun Road, Houston, TX 77204-3008, USA
2 Section of Mathematics, Swiss Federal Institute of Technology, 1015 Lausanne, Switzerland
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     title = {Accelerating the method of finite element patches using approximately harmonic functions},
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He, Jiwen; Lozinski, Alexei; Rappaz, Jacques. Accelerating the method of finite element patches using approximately harmonic functions. Comptes Rendus. Mathématique, Tome 345 (2007) no. 2, pp. 107-112. doi : 10.1016/j.crma.2007.06.006. http://www.numdam.org/articles/10.1016/j.crma.2007.06.006/

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