BERNARD, Florian; IOLLO, Angelo; PUPPO, Gabriella

Métadonnées

Licence d’utilisation du document

BERNARD, Florian
Politecnico di Torino = Polytechnic of Turin [Polito]
Institut de Mathématiques de Bordeaux [IMB]
Modélisation, contrôle et calcul [MC2]

IOLLO, Angelo
Institut de Mathématiques de Bordeaux [IMB]
Modélisation, contrôle et calcul [MC2]

PUPPO, Gabriella
Universitá degli Studi dell’Insubria = University of Insubria [Varese] [Uninsubria]

Langue

Communication dans un congrès

Ce document a été publié dans

2nd ECCOMAS Young Investigators Conference (YIC 2013), 2013-09-02, Bordeaux.

Résumé en anglais

A simple second order scheme is presented for BGK equation on cartesian grids to simulate rareﬁed gas ﬂows. An immersed boundary technique is then used since the mesh is body ﬁtted. The asymptotic preserving properties of the BGK equation discretization towards Euler limit are also investigated with emphasis on the boundary conditions as the Knudsen number goes to zero. Reconstruction techniques and levelset functions are used to modify the ﬂuxes at the nearest interface of the body and enforce the boundary conditions at second order. The same method is applied in 1D and 2D cases to demonstrate its accuracy< Réduire

Mots clés en anglais

BGK model

cartesian meshes

second order

Origine

Importé de hal

Unités de recherche

Institut de Mathématiques de Bordeaux (IMB) - UMR 5251