Superconvergence and a posteriori error estimates for the Stokes eigenvalue problems (Q369414)

From the authors' abstract: We consider the finite element approximation of the Stokes eigenvalue problems based on a projection method, and derive some superconvergence results and the related recovery type a posteriori error estimators. The projection method is a postprocessing procedure that constructs a new approximation by using the least squares strategy. The results are based on some regularity assumptions for the Stokes equations, and are applicable to the finite element approximations of the Stokes eigenvalue problems with general quasi-regular partitions. Numerical results are presented to verify the superconvergence results and the efficiency of the recovery type a posteriori error estimators.