Experiments and Theory on Natural Convection Heat Transfer From Bodies of Complex Shape

[+] Author and Article Information
M. J. Chamberlain

Building Engineering Group, University of Waterloo, Waterloo, Ontario, Canada

K. G. T. Hollands, G. D. Raithby

Thermal Engineering Group, University of Waterloo, Waterloo, Ontario, Canada

J. Heat Transfer 107(3), 624-629 (Aug 01, 1985) (6 pages) doi:10.1115/1.3247469 History: Received April 05, 1984; Online October 20, 2009


Measurements of the heat transfer by natural convection from isothermal bodies to air are reported and compared to the predictions of the method proposed by Raithby and Hollands [7, 8]. The bodies tested were the cube in various orientations and a body consisting of two touching spheres (a bisphere). The experimental Rayleigh number range extended from 10 to 107 . The experimental method incorporated measuring the heat transfer by the transient method and varying the Rayleigh number by varying the pressure. The predictions agreed with the measurements to within an average error of about 3 percent. The results are correlated by single equations, which can be extended to fluids other than air.

Copyright © 1985 by ASME
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