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Unsteady natural convection in a cavity with non-uniform absorption of radiation

Published online by Cambridge University Press:  26 April 2006

Michael J. Coates  and
John C. Patterson
Michael J. Coates
Affiliation:
Department of Environmental Engineering and Centre for Water Research, University of Western Australia, Nedlands, Western Australia
John C. Patterson
Affiliation:
Department of Environmental Engineering and Centre for Water Research, University of Western Australia, Nedlands, Western Australia
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Abstract

A study of the unsteady natural convection in a cavity which was heated by the absorption of radiation entering through part of the surface is reported. While a general scaling analysis is quite complex, involving five separate timescales, most naturally occurring problems fall into just one regime, and it is only this regime which is discussed. To test the scaling, a series of laboratory experiments were performed in which the radiation parameters (surface flux and attenuation coefficient) were varied. The method by which these parameters were determined is also discussed. Numerical experiments were used to extend the parameter range, and the results of all these experiments confirmed the validity of the scaling over a range of parameters.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 256 , November 1993 , pp. 133 - 161
Copyright
© 1993 Cambridge University Press

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