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Schmeling, Daniel and Bosbach, Johannes and Wagner, Claus (2014) Temperature Oscillations in Turbulent Mixed Convective Air Flows. In: Turbulence and Interactions Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 125. Springer Verlag, Berlin Heidelberg. pp. 157-163. ISBN 978-3-662-43488-8. ISSN 1612-2909.
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Official URL: http://link.springer.com/chapter/10.1007/978-3-662-43489-5_19
Abstract
We report on measurements of temperature oscillations observed in turbulent mixed convection in a rectangular enclosure. They are correlated to fluctuations and spontaneous reorientations of the large-scale circulations in the flow. Stable temperature configurations, periodic reconfigurations as well as spontaneous reversals and reorientations were detected. We ascribe the observed dynamics of the largescale flow to the interaction between the superimposed shear forces of the forced convective flow and the buoyancy driven flow. Comparison with smoke visualisations allowed to assign the observed temperature distributions to a certain number and configuration of convection rolls. A frequency analysis of the oscillations as a function of the characteristic numbers is conducted revealing a sophisticated dependency of the dynamics of the large-scale flow on Ar, Re or Ra.
| Item URL in elib: | https://elib.dlr.de/75617/ | |||||||||||||||||||||
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| Document Type: | Contribution to a Collection | |||||||||||||||||||||
| Additional Information: | DOI: 10.1007/978-3-662-43489-5_19, Online ISBN: 978-3-662-43489-5, Proceedings of the TI 2012 Conference | |||||||||||||||||||||
| Title: | Temperature Oscillations in Turbulent Mixed Convective Air Flows | |||||||||||||||||||||
| Authors: |
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| Date: | 2014 | |||||||||||||||||||||
| Journal or Publication Title: | Turbulence and Interactions | |||||||||||||||||||||
| Refereed publication: | Yes | |||||||||||||||||||||
| Open Access: | No | |||||||||||||||||||||
| Gold Open Access: | No | |||||||||||||||||||||
| In SCOPUS: | No | |||||||||||||||||||||
| In ISI Web of Science: | No | |||||||||||||||||||||
| Volume: | 125 | |||||||||||||||||||||
| Page Range: | pp. 157-163 | |||||||||||||||||||||
| Editors: |
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| Publisher: | Springer Verlag, Berlin Heidelberg | |||||||||||||||||||||
| Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | |||||||||||||||||||||
| ISSN: | 1612-2909 | |||||||||||||||||||||
| ISBN: | 978-3-662-43488-8 | |||||||||||||||||||||
| Status: | Published | |||||||||||||||||||||
| Keywords: | Temperature Oscillations, Mixed Convection, Air Flow | |||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||||||||
| HGF - Program: | Aeronautics | |||||||||||||||||||||
| HGF - Program Themes: | fixed-wing aircraft | |||||||||||||||||||||
| DLR - Research area: | Aeronautics | |||||||||||||||||||||
| DLR - Program: | L AR - Aircraft Research | |||||||||||||||||||||
| DLR - Research theme (Project): | L - Systems and Cabin (old) | |||||||||||||||||||||
| Location: | Göttingen | |||||||||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | |||||||||||||||||||||
| Deposited By: | Micknaus, Ilka | |||||||||||||||||||||
| Deposited On: | 18 Sep 2014 15:57 | |||||||||||||||||||||
| Last Modified: | 28 Mar 2023 23:40 |
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