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International Heat Transfer Conference 5

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

THE EFFECT OF SURFACE CONDITIONS ON BOILING CHARACTERISTICS

J. J. Lorenz
Argonne National Laboratory, Argonne, Illinois

Borivoje B. Mikic
Massachusetts Institute of Technology, Dept. of Mechanical Engineergin, Cambridge, MA USA

Warren Max Rohsenow
Massachusetts Institute of Technology, Cambridge, U.S.A.

DOI: 10.1615/IHTC5.150
pages 35-39

Abstract

A unified model relating surface variables to the nucleate pool boiling characteristics was developed. A simple vapor trapping mechanism was postulated and a geometrical model constructed for idealized conical cavities relating the effective radius for nucleation to cavity radius, cone angle and contact angle. This model for individual cavities was extended to the entire surface providing an expression for the cumulative site density in terms of geometrical parameters. A transient heat conduction model was experimentally verified for water and organics at atmospheric pressure and was incorporated into a unified expression showing explicitly the role of surface geometry and contact angle.

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