A posteriori error estimates for a finite element approximation of transmission problems with sign changing coefficients

Serge Nicaise (1) , Juliette Venel (1)

1 LAMAV - Laboratoire de Mathématiques et leurs Applications de Valenciennes - EA 4015

We perform the a posteriori error analysis of residual type of a transmission problem with sign changing coefficients. According to [6] if the contrast is large enough, the continuous problem can be transformed into a coercive one. We further show that a similar property holds for the discrete problem for any regular meshes, extending the framework from [6]. The reliability and efficiency of the proposed estimator is confirmed by some numerical tests.

Mots clés: A posteriori estimator; non positive definite diffusion problems

Domaines: Analyse numérique [math.NA]

Serge Nicaise, Juliette Venel. A posteriori error estimates for a finite element approximation of transmission problems with sign changing coefficients. 2010. ⟨hal-00517989⟩