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Large eddy simulation of turbulent thermal convection using different subgrid scale models

Czarnota, Tomasz and Wetzel, Tim and Wagner, Claus (2014) Large eddy simulation of turbulent thermal convection using different subgrid scale models. 19. DGLR-Fachsymposium der STAB, 04. - 05. Nov. 2014, München, Deutschland.

Full text not available from this repository.

Official URL: http://www.stab2014.tum.de/

Abstract

It is of great interest in many engineering applications to simulate highly turbulent convective flows. For high Rayleigh numbers (Ra), though, it is ineffective to use DNS, giving rise to the need for turbulence modelling. The research in large eddy simulations (LES) has yielded different modelling approaches for the approximation of the subgrid-scale (SGS) regime of the momentum equation. For flow simulations which account for fluid motion due to temperature gradients, turbulence models for the treatment of the heat flux vector in the filtered Navier-Stokes equations (NSE) have been proposed by [1,2]. These models have been compared against results of direct numerical simulations (DNS) and experimental data. However, to our knowledge, no comparison of these models against each other has been published. Thus, we are analysing their limits for moderately turbulent Rayleigh-Bénard convection (RBC) in a cuboidal enclosure. The aim of our investigation is to benchmark various dynamic modelling approaches comparing results of LES and to analyse their prediction of the SGS stress tensor and heat flux vector.

Item URL in elib:https://elib.dlr.de/90029/
Document Type:Conference or Workshop Item (Speech)
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:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 132-133
Series Name:Jahresbericht 2014
Status:Published
Keywords:LES, turbulence modeling, convection
Event Title:19. DGLR-Fachsymposium der STAB
Event Location:München, Deutschland
Event Type:national Conference
Event Dates:04. - 05. Nov. 2014
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: Micknaus, Ilka
Deposited On:12 Nov 2014 13:21
Last Modified:12 Nov 2014 13:21

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