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Stability of the conduction regime of natural convection in a tall vertical annulus

Published online by Cambridge University Press:  19 April 2006

Inn G. Choi  and
Seppo A. Korpela
Inn G. Choi
Affiliation:
Department of Mechanical Engineering, The Ohio State University, Columbus, Ohio 43210
Seppo A. Korpela
Affiliation:
Department of Mechanical Engineering, The Ohio State University, Columbus, Ohio 43210
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Abstract

The stability of natural convection in a vertical annular enclosure has been studied by the linear theory. It was found that for all Prandtl numbers the instability sets in as a wave travelling upward. For low Prandtl numbers, the larger the curvature the more stable the flow; the reverse is true for high Prandtl numbers. The theoretical predictions of the mode of instability were verified for air. A multicellular flow pattern was observed to drift upward with the predicted wave speed. The measured wavelength of the cells is in good agreement with the linear analysis.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 99 , Issue 4 , 29 August 1980 , pp. 725 - 738
Copyright
© 1980 Cambridge University Press

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