Effects of the Heat Transfer at the Side Walls on Natural Convection in Cavities

[+] Author and Article Information
Y. Le Peutrec, G. Lauriat

Laboratoire de Thermique, C.N.A.M., 75141 Paris Cedex 03, France

J. Heat Transfer 112(2), 370-378 (May 01, 1990) (9 pages) doi:10.1115/1.2910387 History: Received July 28, 1988; Revised June 06, 1989; Online May 23, 2008


Numerical solutions are obtained for fluid flows and heat transfer rates for three-dimensional natural convection in rectangular enclosures. The effects of heat losses at the conducting side walls are investigated. The problem is related to the design of cavities suitable for visualizing the flow field. The computations cover Rayleigh numbers from 103 to 107 and the thermal conductance of side walls ranging from adiabatic to commonly used glazed walls. The effect of the difference between the ambient temperature and the average temperature of the two isothermal walls is discussed for both air and water-filled enclosures. The results reported in the paper allow quantitative evaluations of the effects of heat losses to the surroundings, which are important considerations in the design of a test cell.

Copyright © 1990 by The American Society of Mechanical Engineers
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