Details

Autor(en) / Beteiligte

• EICHEL, HAGEN
• TOBISKA, LUTZ
• XIE, HEHU

Titel

Supercloseness and superconvergence of stabilized low-order finite element discretizations of the Stokes Problem

Ist Teil von

• Mathematics of computation, 2011-05, Vol.80 (274), p.697-722

Ort / Verlag

Providence, RI: American Mathematical Society

Erscheinungsjahr

2011

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The supercloseness and superconvergence properties of stabilized finite element methods applied to the Stokes problem are studied. We consider consistent residual based stabilization methods as well as inconsistent local projection type stabilizations. Moreover, we are able to show the supercloseness of the linear part of the MINI-element solution which has been previously observed in practical computations. The results on supercloseness hold on three-directional triangular, axiparallel rectangular, and brick-type meshes, respectively, but extensions to more general meshes are also discussed. Applying an appropriate postprocess to the computed solution, we establish superconvergence results. Numerical examples illustrate the theoretical predictions.