A NEW APPROACH TO RECOVERY OF DISCONTINUOUS GALERKIN
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
A new recovery operator P : Q(n)(disc)(T) -> Q(n+1)(disc)(M) for discontinuous Galerkin is derived. It is based on the idea of projecting a discontinuous, piecewise polynomial solution on a given mesh T into a higher order polynomial space on a macro mesh M. In order to do so, we define local degrees of freedom using polynomial moments and provide global degrees of freedom on the macro mesh. We prove consistency with respect to the local L-2-projection, stability results in several norms and optimal anisotropic error estimates. As an example, we apply this new recovery technique to a stabilized solution of a singularly perturbed convection-diffusion problem using bilinear elements.
Details
Original language | English |
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Pages (from-to) | 697-712 |
Number of pages | 16 |
Journal | Journal of computational mathematics |
Volume | 27 |
Issue number | 6 |
Publication status | Published - Nov 2009 |
Peer-reviewed | Yes |
External IDs
Scopus | 72449169437 |
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ORCID | /0000-0002-2458-1597/work/142239720 |
Keywords
Keywords
- Discontinuous Galerkin, Postprocessing, Recovery, CONVECTION-DIFFUSION PROBLEM, SUPERCONVERGENCE, ELEMENTS, SDFEM