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Journal of Scientific Computing

Erschienen in:

15.12.2018

BGK Polyatomic Model for Rarefied Flows

verfasst von: Florian Bernard, Angelo Iollo, Gabriella Puppo

Erschienen in: Journal of Scientific Computing | Ausgabe 3/2019

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Abstract

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.

Vorheriger Artikel Error Analysis of a Fully Discrete Morley Finite Element Approximation for the Cahn–Hilliard Equation

Nächster Artikel Lowest-Order Weak Galerkin Finite Element Methods for Linear Elasticity on Rectangular and Brick Meshes

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Titel: BGK Polyatomic Model for Rarefied Flows
verfasst von: Florian Bernard
Angelo Iollo
Gabriella Puppo
Publikationsdatum: 15.12.2018
Verlag: Springer US
Erschienen in: Journal of Scientific Computing / Ausgabe 3/2019
Print ISSN: 0885-7474
Elektronische ISSN: 1573-7691
DOI: https://doi.org/10.1007/s10915-018-0864-x

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