Flow Film Boiling From a Sphere to Subcooled Freon-11

[+] Author and Article Information
J. A. Orozco

University of Illinois at Chicago, Chicago, IL 60680

L. C. Witte

Heat Transfer/Phase Change Laboratory, University of Houston, University Park, Houston, TX 77004

J. Heat Transfer 108(4), 934-938 (Nov 01, 1986) (5 pages) doi:10.1115/1.3247037 History: Received February 04, 1985; Online October 20, 2009


The boiling curves for flow boiling of freon-11 from a fluid-heated 3.81-cm-dia copper sphere showed dual maxima. One maximum corresponded to the nucleate peak heat flux while the other was caused by transitory behavior of the wake behind the sphere. Film boiling data were predicted well by the theory of Witte and Orozco. A semi-empirical correlation of the film boiling data accounting for both liquid velocity and subcooling predicted the heat transfer to within +/− 20 percent. The conditions at which the vapor film became unstable were also determined for various sub-coolings and velocities.

Copyright © 1986 by ASME
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