Publication type: Conference paper
Type of review: Not specified
Title: A gas-kinetic scheme for the simulation of turbulent flow
Authors : Righi, Marcello
Proceedings: Proceedings of the 29th International Symposium on Rarefied Gas Dynamics
Conference details: 29th International Symposium on Rarefied Gas Dynamics, Xi'an, China, 13-18 July 2014
Issue Date: 2014
Publisher / Ed. Institution : RGD29
Publisher / Ed. Institution: Xi'an
ISBN: 978-0-7354-1265-1
978-0-7354-1266-8
978-0-7354-1267-5
Language : English
Subjects : Turbulence Modelling; Gas-Kinetic; RANS; Boltzmann
Subject (DDC) : 530: Physics
Abstract: A BGK gas-kinetic scheme may simulate turbulent flow, provided the relaxation time is defined in such a way, that it accounts for the unresolved turbulent fluctuations. In this study, a simple turbulent gas-kinetic scheme is developed by coupling the evolution of conservative variables to a two-equation turbulence model. Its behavior is compared to the one of conventional schemes, based on the Navier-Stokes equations, by simulating turbulent flow cases with strong interactions between shocks and boundary layer. Whereas conventional schemes are known to fail, or to be rather inaccurate, the turbulent gas-kinetic scheme provides results which are consistently good or at least acceptable for engineering standards. It is argued, that gas-kinetic schemes have an in-built “multiscale” sensor which correct advection whenever the ratio of unresolved to resolved scales of motion raises above negligible values.
URI: https://digitalcollection.zhaw.ch/handle/11475/13608
Fulltext version : Published version
License (according to publishing contract) : Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Mechanical Systems (IMES)
Appears in Collections:Publikationen School of Engineering

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