Skip to Main content Skip to Navigation
Journal articles

A local a posteriori error estimator based on equilibrated fluxes

Abstract : We present and analyze a new a posteriori error estimator for lowest order conforming finite elements. It is based on Raviart--Thomas finite elements and can be obtained locally by a postprocessing technique involving for each vertex a local subproblem associated with a dual mesh. Under certain regularity assumptions on the right-hand side, we obtain an error estimator where the constant in the upper bound for the true error tends to one. Replacing the conforming finite element solution by a postprocessed one, the error estimator is asymptotically exact. The local equivalence between our estimator and the standard residual-based error estimator is established. Numerical results illustrate the performance of the error estimator.
Document type :
Journal articles
Complete list of metadata

https://hal.inria.fr/inria-00343040
Contributor : Vincent Perrier <>
Submitted on : Friday, November 28, 2008 - 6:48:08 PM
Last modification on : Thursday, February 11, 2021 - 2:40:03 PM

Identifiers

Collections

Citation

Robert Luce, B.I. Wohlmuth. A local a posteriori error estimator based on equilibrated fluxes. SIAM Journal on Numerical Analysis, Society for Industrial and Applied Mathematics, 2004, 42 (4), pp.1394-1414. ⟨10.1137/S0036142903433790⟩. ⟨inria-00343040⟩

Share

Metrics

Record views

202