ABGRALL, Remi; KRUST, Arnaud

Metadatos

Licencia de uso del documento

ABGRALL, Remi
Parallel tools for Numerical Algorithms and Resolution of essentially Hyperbolic problems [BACCHUS]
Institut de Mathématiques de Bordeaux [IMB]

KRUST, Arnaud
Institut de Mathématiques de Bordeaux [IMB]
Parallel tools for Numerical Algorithms and Resolution of essentially Hyperbolic problems [BACCHUS]

Idioma

Rapport

Este ítem está publicado en

2012-01p. 24

Resumen en inglés

We are interested in developing a numerical framework well suited for advection-diffusion problems when the advection part is dominant. In that case, given Dirichlet type boundary condition, it is well known that a boundary layer develops. In order to resolve correctly this layer, standard methods consist in increasing the mesh resolution and possibly increasing the formal accuracy of the numerical method. In this paper, we follow another path: we do not seek to increase the formal accuracy of the scheme but, by a careful choice of finite element, to lower the mesh resolution in the layer. Indeed the finite element representation we choose is locally the sum of a standard one plus an enrichment. This paper proposes such a method and with several numerical examples, we show the potential of this approach. In particular we show that the method is not very sensitive to the choice of the enrichment.< Leer menos

Palabras clave en inglés

enrichment

adaptivity

stabilized finite elements

XFEM

boundary-layer

URI

https://oskar-bordeaux.fr/handle/20.500.12278/189888

Proyecto europeo

Adaptive Schemes for Deterministic and Stochastic Flow Problems

Orígen

Importado de Hal

Centros de investigación

Institut de Mathématiques de Bordeaux (IMB) - UMR 5251