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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: Springer-Verlag Berlin Heidelberg. pp. 571-578. ISBN 978-3-642-14242-0. ISSN 1612-2909

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Abstract

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.

Document Type:Contribution to a Collection
Title:Flow Structure Formation of Turbulent Mixed Convection in a Closed Rectangular Cavity
Authors:
AuthorsInstitution or Email of Authors
Schmeling, DanielDaniel.Schmeling@dlr.de
Westhoff, AndreasAndreas.Westhoff@dlr.de
Kühn, MatthiasMatthias.Kuehn@dlr.de
Bosbach, JohannesJohannes.Bosbach@dlr.de
Wagner, ClausClaus.Wagner@dlr.de
Date:2010
Refereed publication:Yes
Volume:Vol. 1
DOI:10.1007/978-3-642-14243-7_70
Page Range:pp. 571-578
Editors:
EditorsEmail
Dillmann, AndreasUNSPECIFIED
Heller, GerdAirbus Deutschland
Klaas, MichaelRWTH Aachen
Kreplin, Hans-PeterUNSPECIFIED
Nitsche, WolfgangTU Berlin
Schröder, WolfgangRWTH Aachen
Publisher:Springer-Verlag Berlin Heidelberg
ISSN:1612-2909
ISBN:978-3-642-14242-0
Status:Published
Keywords:Mixed Convection, PIV, Large Scale Structures
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics, Transport
HGF - Program Themes:Aircraft Research, Terrestrial Vehicles
DLR - Research area:Aeronautics, Transport
DLR - Program:L AR - Aircraft Research, V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):L - Concepts & Integration, V - Fahrerassistenz (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Daniel Schmeling
Deposited On:15 Dec 2009 08:50
Last Modified:12 Dec 2013 20:38

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