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Transient features of natural convection in a cavity

Published online by Cambridge University Press:  26 April 2006

John C. Patterson  and
S. W. Armfield
John C. Patterson
Affiliation:
Centre for Water Research, University of Western Australia, Nedlands, W.A. 6009, Australia
S. W. Armfield
Affiliation:
Centre for Water Research, University of Western Australia, Nedlands, W.A. 6009, Australia
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Abstract

Comparisons of numerical and experimental results for transient two-dimensional natural convection initiated by instantaneously heating and cooling the opposing vertical walls of a square cavity containing a stationary and isothermal fluid are presented. The good comparisons indicate that the simulation is capturing the important features of the flow. Several features are identified and discussed in detail; in particular, the presence of travelling wave instabilities on the vertical-wall boundary layers and horizontal intrusions, the existence of a rapid flow divergence in the region of the outflow of the intrusions, and the presence of cavity-scale oscillations, caused by the interaction of the intrusions with the opposing vertical boundary layer. The utilization of both numerical and experimental investigations has allowed a more complete exploitation of the available resources than would have been possible had each been conducted separately.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 219 , October 1990 , pp. 469 - 497
Copyright
© 1990 Cambridge University Press

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