The Inception of Nucleate Boiling With Liquid Nitrogen

[+] Author and Article Information
D. W. Almgren

Arthur D. Little, Inc., Cambridge, Mass.

J. L. Smith

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass.

J. Eng. Ind 91(4), 1210-1216 (Nov 01, 1969) (7 pages) doi:10.1115/1.3591773 History: Received July 17, 1968


The phenomena of patchwise boiling are discussed, and the significant parameters restricting the growth of a boiling patch are analytically determined to be: (a) a high nucleate-boiling heat-transfer coefficient, (b) a low total heat flux, (c) the absence of cavities with a trapped liquid vapor interface outside the boiling patch, (d) an appropriate value of wall thermal conductivity, and (e) a high vapor enthalpy per bubble. A qualitative agreement between theory and experiment was observed for items (a), (b), and (d). A surface finish was developed and tested in pool boiling of liquid nitrogen which eliminated the observed, stable temperature hysteresis at inception of nucleate boiling and maintained a low-temperature difference (Tw −Tsat ) for the entire nucleate-boiling curve.

Copyright © 1969 by ASME
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