Horn, Susanne and Shishkina, Olga and Wagner, Claus (2011) Non-Oberbeck-Boussinesq effects in rotating Rayleigh-Bénard convection. Bulletin of the American Physical Society. 64th Annual Meeting of the APS Division of Fluid Dynamics - DFD11, 20. – 22. Nov. 2011, Baltimore, Maryland, USA.
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Official URL: http://meeting.aps.org/Meeting/DFD11/Event/154176
Abstract
We present results from Direct Numerical Simulations of rotating Rayleigh-B\'enard convection in a cylindrical cell with unity aspect ratio for water with a Prandtl number of $Pr = 4.38$ and glycerol with $Pr = 2547.9$ with a special focus on temperature dependent material properties and thus not within the framework of the conventionally used Oberbeck-Boussinesq (OB) approximation. The generated turbulent flow fields are analysed with respect to the deviations from the OB cases. For the non-Oberbeck-Boussinesq cases we obtain a breakdown of the top-bottom symmetry, that is different boundary layer thicknesses, asymmetric velocity flow patterns and modified mean temperature profiles including an increase of the centre temperature and in the case of rotation a diminished temperature gradient within the bulk. Furthermore we find a slightly different scaling of the Nusselt number with the Rayleigh as well as with the Rossby number.
Item URL in elib: | https://elib.dlr.de/70952/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | Non-Oberbeck-Boussinesq effects in rotating Rayleigh-Bénard convection | ||||||||||||
Authors: |
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Date: | 2011 | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Volume: | Vol. 5 | ||||||||||||
Publisher: | Bulletin of the American Physical Society | ||||||||||||
Series Name: | Book of Abstracts | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Rayleigh-Bénard convection | ||||||||||||
Event Title: | 64th Annual Meeting of the APS Division of Fluid Dynamics - DFD11 | ||||||||||||
Event Location: | Baltimore, Maryland, USA | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 20. – 22. Nov. 2011 | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Aeronautics | ||||||||||||
HGF - Program Themes: | Aircraft Research (old) | ||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||
DLR - Program: | L AR - Aircraft Research | ||||||||||||
DLR - Research theme (Project): | L - Simulation & Validation (old) | ||||||||||||
Location: | Göttingen | ||||||||||||
Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | ||||||||||||
Deposited By: | Horn, Susanne | ||||||||||||
Deposited On: | 07 Feb 2012 08:52 | ||||||||||||
Last Modified: | 29 Mar 2023 00:13 |
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