Summary
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 = 1.1·104 and Ra = 3.0·108 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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Baskaya, S., Erturhan, U., Sivrioglu, M.: Experimental investigation of mixed convection from an array of discrete heat sources at the bottom of a horizontal channel. Int. Journal of Heat Mass Transfer 42, 56–63 (2005)
Bosbach, J., Kühn, M., Wagner, C.: Large scale particle image velocimetry with helium filled soap bubbles. Experiments in Fluids 46, 539–547 (2009)
Ebert, A., Resagk, C., Thess, A.: A Experimental study of temperature distribution and local heat flux for turbulent Rayleigh-Bénard convection of air in a long rectangular enclosure. Int. Journal of Heat and Mass Transfer 51, 4238–4248 (2008)
Kaczorowski, M., Wagner, C.: Analysis of the thermal plumes in turbulent Rayleigh-Bénard convection based on well-resolved numerical simulations. J. Fluid Mech. 618, 89–112 (2008)
Kupka, F.: Convection in Stars. In: Proceedings International Astronomical Union Symposium, vol. 224, pp. 119–129 (2004)
Linden, P.F.: The Fluid Mechanics of Natural Ventilation. Annu. Rev. Fluid Mech. 31, 201–238 (1999)
Raffel, M., Willert, C.E., Wereley, S.T., Kompenhans, J.: Particle Image Velocimetry - A practical Guide, 2nd edn. Springer, Heidelberg (2007)
Sillekens, J.J.M., Rindt, C.C.M., Van Steenhoven, A.A.: Developing mixed convection in a coiled heat exchanger. Int. Journal of Heat Mass Transfer 41, 61–72 (1998)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2010 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Schmeling, D., Westhoff, A., Kühn, M., Bosbach, J., Wagner, C. (2010). Flow Structure Formation of Turbulent Mixed Convection in a Closed Rectangular Cavity. In: Dillmann, A., Heller, G., Klaas, M., Kreplin, HP., Nitsche, W., Schröder, W. (eds) New Results in Numerical and Experimental Fluid Mechanics VII. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 112. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14243-7_70
Download citation
DOI: https://doi.org/10.1007/978-3-642-14243-7_70
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-14242-0
Online ISBN: 978-3-642-14243-7
eBook Packages: EngineeringEngineering (R0)