On parameter choice and iterative convergence for stabilised discretisations of advection-diffusion problems

B. Fischer, A. Ramage, D. J. Silvester, A. J. Wathen

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

In this work we consider the design of robust and efficient finite element approximation methods for solving advection-diffusion equations. Specifically, we consider the stabilisation of discrete approximations using uniform grids which do not resolve boundary layers, as might arise using a multi-level (or multigrid) iteration strategy to solve the discrete problem. Our analysis shows that when using SUPG (streamline-upwind) finite element methodology, there is a symbiotic relationship between 'best' solution approximation and fast convergence of smoothers based on the standard GMRES iteration. We also show that stabilisation based on simple artificial diffusion perturbation terms (an approach often advocated by multigrid practitioners) is less appealing.

Original languageEnglish
Pages (from-to)179-195
Number of pages17
JournalComputer Methods in Applied Mechanics and Engineering
Volume179
Issue number1-2
DOIs
Publication statusPublished - 1 Aug 1999

Keywords

  • advection-diffusion
  • stabilisation
  • streamline upwinding

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