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Analysis of Turbulent Free Convection in a Rectangular Rayleigh-Benard Cell

Kaczorowski, Matthias and Wagner, Claus (2007) Analysis of Turbulent Free Convection in a Rectangular Rayleigh-Benard Cell. In: Proceedings of the 8th International Symposium on Experimental and Comutational Aerodynamics of Internal Flows, 1, pp. 291-297. International Symposium on Experimental and Computational Aerodynamics of Internal Flows, 2007-07-02 - 2007-07-05, Lyon (Frankreich).

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Abstract

The present study compares results of direct numerical simulations of thermal convection within a rectangular geometry with Rayleigh-Benard convection in thin fluid layers and cylindrical geometries. It is shown that boundary layer thicknesses show similar tendencies in the rectangular geometry and a thin fluid layer, but the quasi two-dimensional geometry of the container delays the onset of convection significantly. Analysis of the thermal dissipation rates indicates that there are three distinct regimes, of the small scale contribution grows rap-idly as Rayleigh number is increasing, whereas the large scale contribution remains almost constant.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Analysis of Turbulent Free Convection in a Rectangular Rayleigh-Benard Cell
Authors:
AuthorsInstitution or Email of Authors
Kaczorowski, MatthiasUNSPECIFIED
Wagner, ClausUNSPECIFIED
Date:31 January 2007
Journal or Publication Title:Proceedings of the 8th International Symposium on Experimental and Comutational Aerodynamics of Internal Flows
Refereed publication:No
In ISI Web of Science:No
Volume:1
Page Range:pp. 291-297
Editors:
EditorsEmail
Ottavy, X.UNSPECIFIED
Trebinjac, I.UNSPECIFIED
Status:Published
Keywords:DNS, thermal dissipation rate, boundary layer, energy spectrum
Event Title:International Symposium on Experimental and Computational Aerodynamics of Internal Flows
Event Location:Lyon (Frankreich)
Event Type:international Conference
Event Dates:2007-07-02 - 2007-07-05
Organizer:Laboratoire de Mequanique des Fluides et d'Acoustique. Ecole Centrale Lyon
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Matthias Kaczorowski
Deposited On:14 Jan 2008
Last Modified:12 Dec 2013 20:23

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