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Mey, Tobias and Westhoff, Andreas and Wagner, Claus (2013) Experimental Investigation of Flow Structure Formation in a Heated Duct Flow. In: New Results in Numerical Experimental Fluid Mechanics VIII Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 121. Springer Verlag, Heidelberg New York Dordrecht London. pp. 681-688. doi: 10.1007/978-3-642-35680-3_81. ISBN 978-3-642-35679-7. ISSN 1612-2909.
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Official URL: http://link.springer.com/chapter/10.1007/978-3-642-35680-3_81
Abstract
The pattern formation of a Poiseuille flow in a rectangular duct, which is heated from below, is studied experimentally for the Reynolds number Re = 200 within the Rayleigh number range 4 ×108 ≤ Ra ≤ 7 ×108 . The channel has an aspect ratio of Γ yz = width : height = 25 : 2. As working fluid, water (Pr ≈ 6) is used. In order to study the influence of buoyancy on the forced flow, velocity fields are measured plane parallel to the heated bottom plate by means of Particle Image Velocimetry (PIV). Furthermore, the measured data is analyzed concerning the flow structure formation as a function of the temperature difference between the inflow and the bottom of the duct. In this connection, two different mechanisms can be distinguished, which cause the transition from a laminar to a turbulent flow: a successively progressing transition on the one hand and, above a certain Archimedes number Ar, an abrupt transition.
| Item URL in elib: | https://elib.dlr.de/66381/ | ||||||||||||||||||
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| Document Type: | Contribution to a Collection | ||||||||||||||||||
| Additional Information: | Online ISBN: 978-3-642-35680-3 | ||||||||||||||||||
| Title: | Experimental Investigation of Flow Structure Formation in a Heated Duct Flow | ||||||||||||||||||
| Authors: |
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| Date: | 2013 | ||||||||||||||||||
| Journal or Publication Title: | New Results in Numerical Experimental Fluid Mechanics VIII | ||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||||
| Volume: | 121 | ||||||||||||||||||
| DOI: | 10.1007/978-3-642-35680-3_81 | ||||||||||||||||||
| Page Range: | pp. 681-688 | ||||||||||||||||||
| Editors: |
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| Publisher: | Springer Verlag, Heidelberg New York Dordrecht London | ||||||||||||||||||
| Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | ||||||||||||||||||
| ISSN: | 1612-2909 | ||||||||||||||||||
| ISBN: | 978-3-642-35679-7 | ||||||||||||||||||
| Status: | Published | ||||||||||||||||||
| Keywords: | mixed convective flow, duct flow, heat transfer, structure formation | ||||||||||||||||||
| 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 - Projekt Neuartige Fahrzeugstrukturen (old) | ||||||||||||||||||
| Location: | Göttingen | ||||||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | ||||||||||||||||||
| Deposited By: | Westhoff, Andreas | ||||||||||||||||||
| Deposited On: | 26 Nov 2010 10:04 | ||||||||||||||||||
| Last Modified: | 31 Jul 2019 19:29 |
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