A goal-oriented anisotropic hp-mesh adaptation method for linear convection-diffusion-reaction problems

• ID: 2783, RIV: 10403535
• ISSN: 0898-1221, ISBN: neuvedeno
• zdroj: Computers and Mathematics with Applications
• klíčová slova: Goal-oriented error estimates; DWR method; hp-methods; Anisotropic mesh adaptation; Mesh elements optimization
• autoři: Ondřej Bartoš, Vít Dolejší, Georg May, Ajay Rangarajan, Filip Roskovec
• autoři z KNM: Dolejší Vít, Roskovec Filip

Abstrakt

We deal with the numerical solution of linear convection-diffusion-reaction equations using the hp-variant of the discontinuous Galerkin method on triangular grids. We develop a mesh adaptive algorithm which modifies the size and shape of mesh elements and the corresponding polynomial approximation degrees in order to decrease the error in a target functional under the given tolerance. We recall some theoretical results and describe in detail several technical aspects of this approach. Numerical experiments demonstrating the accuracy, efficiency and robustness of the algorithm are presented. (C) 2019 Elsevier Ltd. All rights reserved.