Superheat Layer Thickness Measurements in Saturated and Subcooled Nucleate Boiling

[+] Author and Article Information
J. R. Wiebe

Steel Co. of Canada Ltd., Hamilton, Ontario, Canada

R. L. Judd

McMaster University, Hamilton, Ontario, Canada

J. Heat Transfer 93(4), 455-461 (Nov 01, 1971) (7 pages) doi:10.1115/1.3449845 History: Received November 04, 1970; Online August 11, 2010


An experimental study of temperature profiles in water boiling on a horizontal copper surface is reported for incipient boiling conditions and for 20,000, 50,000, and 100,000 Btu/hr-ft 2 heat flux at various levels of subcooling ranging from 0 to 105 deg F. The extrapolated superheat layer thickness results for the incipient boiling conditions lend support to Hsu’s mathematical model for bubble nucleation. Increasing heat flux and decreasing subcooling were observed to result in a decreasing extrapolated superheat layer thickness. Analysis of some additional results for Freon-113 boiling on a glass surface indicated that the thickness of the extrapolated superheat layer was governed by the bubble flux density which was influenced by both heat flux and subcooling.

Copyright © 1971 by ASME
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