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Enhancing eigenvalue approximation by gradient recovery
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DOI：10.1137/050640588.png)
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Abstract
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The polynomial preserving recovery (PPR) is used to enhance the finite element eigenvalue approximation. Remarkable fourth order convergence is observed for linear elements under structured meshes as well as unstructured initial meshes (produced by the Delaunay triangulation) with the conventional bisection refinement.
Keywords:
finite element method
recovery
superconvergence
eigenvalue
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2.6
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Cited Papers
A defect correction scheme for finite element eigenvalues with applications to quantum chemistry
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