A class of discontinuous Petrov–Galerkin methods. Part III: Adaptivity

Leszek Demkowicz, Jay Gopalakrishnan, Antti H. Niemi

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

We continue our theoretical and numerical study on the Discontinuous Petrov-Galerkin method with optimal test functions in context of 1D and 2D convection-dominated diffusion problems and hp-adaptivity. With a proper choice of the norm for the test space, we prove robustness (uniform stability with respect to the diffusion parameter) and mesh-independence of the energy norm of the FE error for the 1D problem. With hp-adaptivity and a proper scaling of the norms for the test functions, we establish new limits for solving convection-dominated diffusion problems numerically: ε=10 -11 for 1D and ε=10 -7 for 2D problems. The adaptive process is fully automatic and starts with a mesh consisting of few elements only. © 2011 IMACS. Published by Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)396-427
Number of pages32
JournalApplied Numerical Mathematics
Volume62
Issue number4
DOIs
StatePublished - Apr 2012
Externally publishedYes

Fingerprint Dive into the research topics of 'A class of discontinuous Petrov–Galerkin methods. Part III: Adaptivity'. Together they form a unique fingerprint.

Cite this