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.
The Inception of Nucleate Boiling With Liquid Nitrogen
D. W. Almgren,
D. W. Almgren
Arthur D. Little, Inc., Cambridge, Mass.
J. L. Smith, Jr.
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass.
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Almgren, D. W., and Smith, J. L. (November 1, 1969). "The Inception of Nucleate Boiling With Liquid Nitrogen." ASME. J. Eng. Ind. November 1969; 91(4): 1210–1216. https://doi.org/10.1115/1.3591773
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