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Direct numerical simulations of turbulent convection and thermal radiation in a Rayleigh-Bénard cell with solid plates

Czarnota, Tomasz and Wagner, Claus (2014) Direct numerical simulations of turbulent convection and thermal radiation in a Rayleigh-Bénard cell with solid plates. In: Turbulence in Interactions Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 125. Springer Verlag, Berlin Heidelberg. pp. 39-46. ISBN 978-3-662-43488-8. ISSN 1612-2909

Full text not available from this repository.

Official URL: http://link.springer.com/chapter/10.1007/978-3-662-43489-5_5

Abstract

In the present study the effect of the surface to surface radiation on the turbulent convection of air (Prandtl number Pr = 0.7) in a rectangular Rayleigh-Bénard cell is analysed by means of direct numerical simulations. In order to investigate the influence of the radiative boundary conditions on the temperature distribution, heat transfer and the flow intensity, a horizontal, poorly conducting walls with finite thickness are employed. Additionally, the influence of the radiative parameters is shown for Rayleigh number Ra = 6.3×10^7. We notice that the temperature at the warm interface decreases and it increases at the cold interface. Thus, the lower temperature difference appears what reduces the flow intensity. We observe that radiation causes a drop of convective heat flux however, the overall heat transfer increases due to high radiative heat flux. All the effects of radiation are stronger for higher conduction-radiation numbers and for higher temperature ratios.

Item URL in elib:https://elib.dlr.de/90031/
Document Type:Contribution to a Collection
Additional Information:Online ISBN: 978-3-662-43489-5, DOI: 10.1007/978-3-662-43489-5_5, Proceedings of the TI 2012 conference
Title:Direct numerical simulations of turbulent convection and thermal radiation in a Rayleigh-Bénard cell with solid plates
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Czarnota, TomaszTomasz.Czarnota (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Turbulence in Interactions
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:125
Page Range:pp. 39-46
Editors:
EditorsEmail
Deville, Michel O.Ecole Polytechnique Fédérale de Lausanne, Switzerland
Lê, Thien-HiepONERA Chatillon, France
Estivalezes, Jean-LucONERA Toulouse, Frane
Terracol, MarcONERA Chatillon, France
Gleize, VincentONERA Chatillon, France
Vincent, StéphaneENSCBP Pessac, France
Publisher:Springer Verlag, Berlin Heidelberg
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-662-43488-8
Status:Published
Keywords:DNS, Rayleigh-Benard, convection, radiation
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:18 Sep 2014 15:58
Last Modified:18 Sep 2014 15:58

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