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Formation of cells in natural convection in a vertical slot at large Prandtl number

Published online by Cambridge University Press:  26 April 2006

Shunichi Wakitani
Shunichi Wakitani
Affiliation:
Department of Mechanical Engineering, College of Industrial Technology, 1-27-1 Nishikoya, Amagasaki 661, Japan
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Abstract

This paper presents several features at supercritical conditions of natural convection of large Prandtl number fluids in a vertical slot. Both experimental and numerical results show that even at slightly supercritical conditions the multicellular flow is in an unsteady state which is attributed to the moving and merging of cells. The effect of variable viscosity on the unsteadiness is investigated numerically. Successive merging and appearance of cells is characteristic of this convection so that the number of secondary cells changes with time. The bifurcation phenomena characterized by several modes of unsteady cellular flow are examined.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 314 , 10 May 1996 , pp. 299 - 314
Copyright
© 1996 Cambridge University Press

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