Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen: https://doi.org/10.21256/zhaw-4907
Publikationstyp: Beitrag in wissenschaftlicher Zeitschrift
Art der Begutachtung: Peer review (Publikation)
Titel: A modified gas-kinetic scheme for turbulent flow
Autor/-in: Righi, Marcello
DOI: 10.21256/zhaw-4907
10.4208/cicp.140813.021213a
Erschienen in: Communications in Computational Physics
Band(Heft): 16
Heft: 1
Seite(n): 239
Seiten bis: 263
Erscheinungsdatum: Jul-2014
Verlag / Hrsg. Institution: Global Science Press
ISSN: 1815-2406
1991-7120
Sprache: Englisch
Schlagwörter: Physics - fluid dynamics
Fachgebiet (DDC): 530: Physik
Zusammenfassung: The implementation of a turbulent gas-kinetic scheme into a finite-volume RANS solver is put forward, with two turbulent quantities, kinetic energy and dissipation, supplied by an allied turbulence model. This paper shows a number of numerical simulations of flow cases including an interaction between a shock wave and a turbulent boundary layer, where the shock-turbulent boundary layer is captured in a much more convincing way than it normally is by conventional schemes based on the Navier-Stokes equations. In the gas-kinetic scheme, the modeling of turbulence is part of the numerical scheme, which adjusts as a function of the ratio of resolved to unresolved scales of motion. In so doing, the turbulent stress tensor is not constrained into a linear relation with the strain rate. Instead it is modeled on the basis of the analogy between particles and eddies, without any assumptions on the type of turbulence or flow class. Conventional schemes lack multiscale mechanisms: the ratio of unresolved to resolved scales – very much like a degree of rarefaction – is not taken into account even if it may grow to non-negligible values in flow regions such as shocklayers. It is precisely in these flow regions, that the turbulent gas-kinetic scheme seems to provide more accurate predictions than conventional schemes.
Weitere Angaben: Published online: 16 April 2014, erworben im Rahmen der Schweizer Nationallizenzen (www.nationallizenzen.ch)
URI: https://digitalcollection.zhaw.ch/handle/11475/13398
Volltext Version: Publizierte Version
Lizenz (gemäss Verlagsvertrag): Lizenz gemäss Verlagsvertrag
Gesperrt bis: 2019-07-01
Departement: School of Engineering
Organisationseinheit: Institut für Mechanische Systeme (IMES)
Enthalten in den Sammlungen:Publikationen School of Engineering

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