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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: |
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| 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 SCOPUS: | No | ||||||
| In ISI Web of Science: | No | ||||||
| Volume: | 1 | ||||||
| Page Range: | pp. 291-297 | ||||||
| Editors: |
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| 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: | Aeronautics | ||||||
| HGF - Program Themes: | L - no assignement | ||||||
| DLR - Research area: | no assignement | ||||||
| DLR - Program: | L - no assignement | ||||||
| DLR - Research theme (Project): | ["eprint_fieldopt_dlr_project_search_L000" not defined] | ||||||
| Location: | Göttingen | ||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | ||||||
| Deposited By: | Matthias Kaczorowski | ||||||
| Deposited On: | 14 Jan 2008 | ||||||
| Last Modified: | 15 Jan 2010 00:13 |
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