KNM MFF UK

Department of Numerical Mathematics Faculty of Mathematics and Physics Charles University

A local projection stabilization finite element method with nonlinear crosswind diffusion for convection-diffusion-reaction equations

  • ID: 2574, RIV: 10190483
  • ISSN: 0764-583X, ISBN: not specified
  • source: Mathematical Modelling and Numerical Analysis
  • keywords: Finite element method; local projection stabilization; crosswind diffusion; convection-diffusion-reaction equation; well posedness; time dependent problem; stability; error estimates
  • authors: Gabriel R. Barrenechea, Volker John, Petr Knobloch
  • authors from KNM: Knobloch Petr

Abstract

An extension of the local projection stabilization (LPS) finite element method for convection-diffusion-reaction equations is presented and analyzed, both in the steady-state and the transient setting. In addition to the standard LPS method, a nonlinear crosswind diffusion term is introduced that accounts for the reduction of spurious oscillations. The existence of a solution can be proved and, depending on the choice of the stabilization parameter, also its uniqueness. Error estimates are derived which are supported by numerical studies. These studies demonstrate also the reduction of the spurious oscillations.