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Subgrid scale modelling of Relaminarization Effects in a differentially heated channel

Wetzel, Tim and Wagner, Claus (2018) Subgrid scale modelling of Relaminarization Effects in a differentially heated channel. In: New Results in Numerical and Experimental Fluid Mechanics XI, 136, pp. 499-508. Springer International Publishing AG. 20th STAB/DGLR Symposium Braunschweig, 09.-11. Nov. 2016, Braunschweig, Deutschland. DOI: 10.1007/978-3-319-64519-3 ISBN 978-3-319-64518-6 ISSN 1612-2909

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Official URL: https://www.tu-braunschweig.de/stab2016

Abstract

Turbulent mixed convection in a differentially heated vertical channel is simulated by means of direct numerical simulation and large eddy simulation. With regard to the LES different subgrid-scale models are compared and their ability to predict the flow is analysed. The comparison is based on statistical moments as well as two-point correlations that show the models' abilities to represent the sizes of flow structures. A newly proposed local formulation for the classical Smagorinsky SGS model has been identified as the best choice for mixed convection flows, although it can still be improved. The importance of the accuracy of SGS heat flux models is shown to be negligible when the momentum transport is not predicted properly. Their influence can even lead to deviations in both momentum and heat transport as shown with the classical dynamic Smagorinsky model in combination with different SGS heat flux models.

Item URL in elib:https://elib.dlr.de/117779/
Document Type:Conference or Workshop Item (Speech)
Additional Information:ISSN 1860-0824 (electronic); ISBN 978-3-319-64519-3 (eBook); https://doi.org/10.1007/978-3-319-64519-3_45
Title:Subgrid scale modelling of Relaminarization Effects in a differentially heated channel
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wetzel, TimTim.Wetzel (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics XI
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:136
DOI :10.1007/978-3-319-64519-3
Page Range:pp. 499-508
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen
Heller, GerdAirbus, Bremen
Krämer, EwaldUNI Stuttgart
Wagner, ClausDLR Göttingen
Bansmer, StephanTU Braunschweig
Radespiel, RolfTU Braunschweig
Semaan, RichardTU Braunschweig
Publisher:Springer International Publishing AG
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design 136
ISSN:1612-2909
ISBN:978-3-319-64518-6
Status:Published
Keywords:Turbulenz, DNS, LES, Kanalströmung, Wärmestransport
Event Title:20th STAB/DGLR Symposium Braunschweig
Event Location:Braunschweig, Deutschland
Event Type:national Conference
Event Dates:09.-11. Nov. 2016
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 for Aerodynamics and Flow Technology > Fluid Systems, GO
Deposited By: Bachmann, Barbara
Deposited On:24 Jan 2018 12:19
Last Modified:24 May 2018 11:33

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