BGK Polyatomic Model for Rarefied Flows - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Journal Articles Journal of Scientific Computing Year : 2019

BGK Polyatomic Model for Rarefied Flows


In this work we present a new model of BGK type for polyatomic gases. The model incorporates the different relaxation rates of translational, rotational and/or vibrational modes characterizing polyatomic molecules using a BGK-type equation, and additional relaxation equations for the temperatures associated to each internal energy mode. We construct an efficient numerical scheme which is implicit in the relaxation terms, and test the model and the scheme on several problems, confirming the Asymptotic Preserving properties of the scheme, and comparing the results provided by the model with experimental and DSMC simulations, carried out on the full Boltzmann polyatomic equation.
Fichier principal
Vignette du fichier
polyatomicV3.pdf (3.94 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-02419447 , version 1 (04-01-2020)



Florian Bernard, Angelo Iollo, Gabriella Puppo. BGK Polyatomic Model for Rarefied Flows. Journal of Scientific Computing, 2019, 78 (3), pp.1893-1916. ⟨10.1007/s10915-018-0864-x⟩. ⟨hal-02419447⟩
69 View
196 Download



Gmail Facebook X LinkedIn More