Publication type: Conference paper
Type of review: Not specified
Title: A numerical scheme for hypersonic turbulent flow : AIAA 2015-3341
Authors: Righi, Marcello
DOI: 10.2514/MFD15
Proceedings: Proceedings of the 45th Fluid Dynamics Conference : Hypersonic and Chemically-Reacting Flows
Conference details: 45th AIAA Fluid Dynamics Conference «Hypersonic and Chemically-Reacting Flows» Dallas TX, USA, 22-26 June 2015
Issue Date: 2015
Publisher / Ed. Institution: AIAA AVIATION Forum
ISBN: 978-1-62410-362-9
Language: English
Subject (DDC): 530: Physics
620: Engineering
Abstract: When it comes to simulate hypersonic flows, gas-kinetic schemes provide one distinct advantage over conventional Navier-Stokes schemes: they are able to handle rarefaction in a “natural” way; they can for instance provide a natural slip wall boundary condition. As previous studies by the author had shown encouraging results obtained with a gas-kinetic scheme with flows including shock - turbulent boundary layer interaction, this work looks at hypersonic turbulent flows. In particular, it investigates the application of a gas-kinetic scheme with a RANS turbulence model for high-enthalpy hypersonic flows. On the basis of preliminary results, the idea is put forward that these schemes provide a physically more consistent framework to model numerical fluxes. In particular, they generate at each time step a time-accurate gas-evolution stage which contains both “transport” and “collisions” effects, i.e. which allows modelling both advective and viscous fluxes simultaneously - a necessary condition for rarefied flow. Additionally, the author points out that in the framework of an eddy viscosity approach, an artificially high degree of rarefaction – due to the turbulent unresolved scales of motion – may appear locally and “mislead” conventional schemes.
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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