A unified convergence analysis for local projection stabilisations applied to the Oseen problem

Gunar Matthies, Piotr Skrzypacz, Lutz Tobiska

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

The discretisation of the Oseen problem by finite element methods may suffer in general from two shortcomings. First, the discrete inf-sup (Babuška-Brezzi) condition can be violated. Second, spurious oscillations occur due to the dominating convection. One way to overcome both difficulties is the use of local projection techniques. Studying the local projection method in an abstract setting, we show that the fulfilment of a local inf-sup condition between approximation and projection spaces allows to construct an interpolation with additional orthogonality properties. Based on this special interpolation, optimal a-priori error estimates are shown with error constants independent of the Reynolds number. Applying the general theory, we extend the results of Braack and Burman for the standard two-level version of the local projection stabilisation to discretisations of arbitrary order on simplices, quadrilaterals, and hexahedra,. Moreover, our general theory allows to derive a novel class of local projection stabilisation by enrichment of the approximation spaces. This class of stabilised schemes uses approximation and projection spaces defined on the same mesh and leads to much more compact stencils than in the two-level approach. Finally, on simplices, the spectral equivalence of the stabilising terms of the local projection method and the subgrid modelling introduced by Guermond is shown. This clarifies the relation of the local projection stabilisation to the variational multiscale approach.

Original languageEnglish
Pages (from-to)713-742
Number of pages30
JournalESAIM: Mathematical Modelling and Numerical Analysis
Volume41
Issue number4
DOIs
Publication statusPublished - Jul 2007
Externally publishedYes

Fingerprint

Convergence Analysis
Stabilization
Projection
Interpolation
Projection Method
Reynolds number
Finite element method
Discretization
Interpolate
Inf-sup Condition
A Priori Error Estimates
Approximation Space
Optimal Error Estimates
Approximation
Orthogonality
Convection
Finite Element Method
Equivalence
Mesh
Oscillation

Keywords

  • Equal-order interpolation
  • Navier-Stokes equations
  • Stabilised finite elements

ASJC Scopus subject areas

  • Mathematics(all)
  • Analysis
  • Applied Mathematics
  • Modelling and Simulation

Cite this

A unified convergence analysis for local projection stabilisations applied to the Oseen problem. / Matthies, Gunar; Skrzypacz, Piotr; Tobiska, Lutz.

In: ESAIM: Mathematical Modelling and Numerical Analysis, Vol. 41, No. 4, 07.2007, p. 713-742.

Research output: Contribution to journalArticle

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