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Flow Structure Formation of Turbulent Mixed Convection in a Closed Rectangular Cavity

Schmeling, Daniel and Westhoff, Andreas and Kühn, Matthias and Bosbach, Johannes and Wagner, Claus (2010) Flow Structure Formation of Turbulent Mixed Convection in a Closed Rectangular Cavity. In: New Results in Numerical and Experimental Fluid Mechanics VII Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 112. Springer-Verlag, Berlin Heidelberg. pp. 571-578. doi: 10.1007/978-3-642-14243-7_70. ISBN 978-3-642-14242-0. ISSN 1612-2909.

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Official URL: http://link.springer.com/chapter/10.1007%2F978-3-642-14243-7_70#


An experimental investigation of flow structure formation in turbulent mixed convection in a closed rectangular cavity with an aspect ratio of 1 : 1 : 5 and air as working fluid is presented. Mixed convection at Re = 1.1 · 10^4 and Ra = 3.0 · 10^8 is studied under well-defined conditions by combination of forced and thermal convection. The resulting flow structures strongly depend on the ratio of inertia and buoyancy forces. A 2D mean wind, which can be approximated by a solid body rotation, is found at pure forced convection. With increasing Archimedes number (Ar), realized by a temperature gradient between bottom and ceiling of the convection cell, this structure becomes instable. Leading to four convection rolls for Ar = 3.4, which are oriented in longitudinal direction of the cell, are observed.

Item URL in elib:https://elib.dlr.de/59018/
Document Type:Contribution to a Collection
Title:Flow Structure Formation of Turbulent Mixed Convection in a Closed Rectangular Cavity
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schmeling, DanielDaniel.Schmeling (at) dlr.deUNSPECIFIED
Westhoff, AndreasAndreas.Westhoff (at) dlr.deUNSPECIFIED
Kühn, MatthiasMatthias.Kuehn (at) dlr.deUNSPECIFIED
Bosbach, JohannesJohannes.Bosbach (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics VII
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/978-3-642-14243-7_70
Page Range:pp. 571-578
EditorsEmailEditor's ORCID iD
Heller, GerdAirbus DeutschlandUNSPECIFIED
Klaas, MichaelRWTH AachenUNSPECIFIED
Nitsche, WolfgangTU BerlinUNSPECIFIED
Schröder, WolfgangRWTH AachenUNSPECIFIED
Publisher:Springer-Verlag, Berlin Heidelberg
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:Mixed Convection, PIV, Large Scale Structures
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 - Concepts & Integration (old), V - Fahrerassistenz (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Schmeling, Dr Daniel
Deposited On:15 Dec 2009 08:50
Last Modified:20 Feb 2015 09:13

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