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Experimental Investigation of Flow Structure Formation in a Heated Duct Flow

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. ISBN 978-3-642-35679-7. ISSN 1612-2909


Official URL: http://link.springer.com/chapter/10.1007/978-3-642-35680-3_81


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/
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
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mey, Tobiastobias.met (at) llg-ev.deUNSPECIFIED
Westhoff, Andreasandreas.westhoff (at) dlr.deUNSPECIFIED
Wagner, Clausclaus.wagner (at) dlr.deUNSPECIFIED
Journal or Publication Title:New Results in Numerical Experimental Fluid Mechanics VIII
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/978-3-642-35680-3_81
Page Range:pp. 681-688
Dillmann, AndreasDLR
Heller, GerdAirbus Deutschland, Bremen, Germany
Kreplin, Hans-PeterDLR
Nitsche, WolfgangTU Berlin, Berlin, Germany
Peltzer, InkenBeechcraft Berlin aviation GmbH, Schönefeld, Germany
Publisher:Springer Verlag, Heidelberg New York Dordrecht London
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
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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