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Wagner, Sebastian and Shishkina, Olga and Wagner, Claus (2014) Influence of the Geometry on Rayleigh-Bénard Convection. In: New Results in Numerical and Experimental Fluid Mechanics IX Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 124. Springer Verlag, Cham Heidelberg New York Dordrecht London. pp. 313-321. ISBN 978-3-319-03157-6. ISSN 1612-2909.
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Official URL: http://link.springer.com/book/10.1007%2F978-3-319-03158-3_32
Abstract
Direct numerical simulations (DNS) of Rayleigh-Bénard convection in a cube and a cylinder with equal diameter and height are performed to investigate the main responses of the system, namely heat flux and motion. Differences in the latter two quantities for the two geometries suggest a transition between different flow states in the cube, which is not observed in the cylinder due to its rotational symmetry. A method is introduced to analyse the flow dynamics in the cube, which relies on the temperature distribution at the lateral walls. It reveals that above a certain Rayleigh number the global flow structure in the cube is organized in a diagonal manner and not longer parallel to the walls, which leads to differences in the heat flux and the kinetic energy in the cylindrical and the cubic sample.
| Item URL in elib: | https://elib.dlr.de/75915/ | |||||||||||||||||||||
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| Document Type: | Contribution to a Collection | |||||||||||||||||||||
| Additional Information: | ISSN 1860-0824 (electronic); ISBN: 978-3-319-03158-3 (eBook); DOI 10.1007/978-3-319-03158-3_32; Library of Congress Control Number: 2013957123 | |||||||||||||||||||||
| Title: | Influence of the Geometry on Rayleigh-Bénard Convection | |||||||||||||||||||||
| Authors: |
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| Date: | 2014 | |||||||||||||||||||||
| Journal or Publication Title: | New Results in Numerical and Experimental Fluid Mechanics IX | |||||||||||||||||||||
| Refereed publication: | Yes | |||||||||||||||||||||
| Open Access: | No | |||||||||||||||||||||
| Gold Open Access: | No | |||||||||||||||||||||
| In SCOPUS: | No | |||||||||||||||||||||
| In ISI Web of Science: | No | |||||||||||||||||||||
| Volume: | 124 | |||||||||||||||||||||
| Page Range: | pp. 313-321 | |||||||||||||||||||||
| Editors: |
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| Publisher: | Springer Verlag, Cham Heidelberg New York Dordrecht London | |||||||||||||||||||||
| Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | |||||||||||||||||||||
| ISSN: | 1612-2909 | |||||||||||||||||||||
| ISBN: | 978-3-319-03157-6 | |||||||||||||||||||||
| Status: | Published | |||||||||||||||||||||
| Keywords: | Rayleigh-Benard Konvektion, räumliche Auflösung, direkte numerische Simulation | |||||||||||||||||||||
| 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 - Project Next Generation Train II (old) | |||||||||||||||||||||
| Location: | Göttingen | |||||||||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | |||||||||||||||||||||
| Deposited By: | Wagner, Sebastian | |||||||||||||||||||||
| Deposited On: | 28 Mar 2014 11:34 | |||||||||||||||||||||
| Last Modified: | 28 Mar 2014 11:34 |
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