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Natural convection with discontinuous wall-temperature variations

Published online by Cambridge University Press:  28 March 2006

Joseph A. Schetz  and
Roger Eichhorn
Joseph A. Schetz
Affiliation:
General Applied Science Laboratories, Inc., Westbury, New York
Roger Eichhorn
Affiliation:
Princeton University, Princeton, New Jersey
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Abstract

At present, solutions for natural convection problems involving discontinuous changes in wall temperature do not exist. This paper reports results of an extensive experimental investigation of the particular case of a vertical flat plate with a step-change in wall temperature. Temperature profiles and local heat transfer coefficients determined with a Mach-Zehnder Interferometer are presented for a wide range of the pertinent parameters. The flow field associated with this problem was studied by means of a series of Tellurium dye experiments in water. Photographs are presented showing representative flow patterns, and the stability of the flow is considered as a function of the ratio of the excess temperature below a discontinuity to the excess temperature above.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 18 , Issue 2 , February 1964 , pp. 167 - 176
Copyright
© 1964 Cambridge University Press

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