Experimental Observations of the Microlayer in Vapor Bubble Growth on a Heated Solid

[+] Author and Article Information
L. D. Koffman, M. S. Plesset

Division of Engineering and Applied Science, Department of Engineering Science, California Institute of Technology, Pasadena, Calif. 91125

J. Heat Transfer 105(3), 625-632 (Aug 01, 1983) (8 pages) doi:10.1115/1.3245631 History: Received April 26, 1982; Online October 20, 2009


Experimental measurements of microlayer formation and of the time history of microlayer thickness change have been obtained for nucleate boiling of water and ethanol. These detailed measurements were obtained using laser interferometry combined with high-speed cinematography. The measurement technique is discussed in detail with emphasis on the difficulties encountered in interpretation of the fringe patterns. The measurements for water can be reasonably applied to the data of Gunther and Kreith, in which case it is concluded that microlayer evaporation alone cannot account for the increased heat transfer rates observed in highly subcooled nucleate boiling. It appears that microconvection must play at least an equal role.

Copyright © 1983 by ASME
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