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Large Eddy Simulation of Turbulent Thermal Convection Using Different Subgrid-Scale Models

Czarnota, Tomasz and Wetzel, Tim and Wagner, Claus (2016) Large Eddy Simulation of Turbulent Thermal Convection Using Different Subgrid-Scale Models. In: New Results in Numerical and Experimental Fluid Mechanics X Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 132. Springer International Publishing Switzerland 2016. pp. 505-514. ISBN 978-3-319-27278-8. ISSN 1612-2909

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Abstract

We present a comparison of large eddy simulations of turbulent convection in a cuboidal Rayleigh-Bénard cell. The LES are performed with the dynamic Smagorinsy model in the monentum equation and with the subgrid scale heat transprt model by Peng an Davidson [5] in the energy equation. Additionally, LES were conducted with a dynamic scale similarity model used in the momentum and in the energy equation. It was found that in contrast to the scale similarity model, the dynamic Smagorinsky model occasionally produces unphysical temperature values which must be filtered out. Their number can be reduced by increasing the filter ratio in the dynamic procedure. On the other Hand, the Smagorinsky model Shows a log-like dependency on the filter width ratio for all compared quantites, with the fluxes for the smallest considered folter width ratio.

Item URL in elib:https://elib.dlr.de/110360/
Document Type:Contribution to a Collection
Additional Information:DOI 10.1007/978-3-319-27279-5_44
Title:Large Eddy Simulation of Turbulent Thermal Convection Using Different Subgrid-Scale Models
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Czarnota, Tomasztomasz.czarnota (at) dlr.deUNSPECIFIED
Wetzel, TimTim.Wetzel (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics X
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:132
DOI :10.1007/978-3-319-27279-5
Page Range:pp. 505-514
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen
Heller, GerdAirbus Bremen
Krämer, EwaldUNI Stuttgart
Wagner, ClausDLR Göttingen
Breitsamer, ChristianTU München
Publisher:Springer International Publishing Switzerland 2016
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-319-27278-8
Status:Published
Keywords:LES, turbulence modeling, convection
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Bachmann, Barbara
Deposited On:10 Jan 2017 16:15
Last Modified:22 Jan 2018 16:50

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