The present paper deals with a finite element approximation of partial differential equations when the domain is decomposed into sub-domains which are meshed independently. The method we obtain is never conforming because the continuity constraints on the boundary of the sub-domains are not imposed strongly but only penalized. We derive a selection rule for the penalty parameter which ensures a quasi-optimal convergence.
@article{M2AN_2003__37_2_357_0, author = {Boillat, Eric}, title = {Finite element methods on non-conforming grids by penalizing the matching constraint}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique}, volume = {37}, year = {2003}, pages = {357-372}, doi = {10.1051/m2an:2003031}, mrnumber = {1991206}, zbl = {1043.65124}, language = {en}, url = {http://dml.mathdoc.fr/item/M2AN_2003__37_2_357_0} }
Boillat, Eric. Finite element methods on non-conforming grids by penalizing the matching constraint. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 37 (2003) pp. 357-372. doi : 10.1051/m2an:2003031. http://gdmltest.u-ga.fr/item/M2AN_2003__37_2_357_0/
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