Horn, Susanne und Shishkina, Olga und 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, 2011-11-20 - 2011-11-22, Baltimore, Maryland, USA.
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Offizielle URL: http://meeting.aps.org/Meeting/DFD11/Event/154176
Kurzfassung
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.
elib-URL des Eintrags: | https://elib.dlr.de/70952/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||
Titel: | Non-Oberbeck-Boussinesq effects in rotating Rayleigh-Bénard convection | ||||||||||||||||
Autoren: |
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Datum: | 2011 | ||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
Band: | Vol. 5 | ||||||||||||||||
Verlag: | Bulletin of the American Physical Society | ||||||||||||||||
Name der Reihe: | Book of Abstracts | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Rayleigh-Bénard convection | ||||||||||||||||
Veranstaltungstitel: | 64th Annual Meeting of the APS Division of Fluid Dynamics - DFD11 | ||||||||||||||||
Veranstaltungsort: | Baltimore, Maryland, USA | ||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 20 November 2011 | ||||||||||||||||
Veranstaltungsende: | 22 November 2011 | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||
HGF - Programmthema: | Starrflügler (alt) | ||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | L AR - Starrflüglerforschung | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Simulation & Validierung (alt) | ||||||||||||||||
Standort: | Göttingen | ||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Fluidsysteme | ||||||||||||||||
Hinterlegt von: | Horn, Susanne | ||||||||||||||||
Hinterlegt am: | 07 Feb 2012 08:52 | ||||||||||||||||
Letzte Änderung: | 24 Apr 2024 19:36 |
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