Film Boiling of Saturated Nitrogen Flowing in a Vertical Tube

[+] Author and Article Information
W. F. Laverty

Carnegie Institute of Technology, Pittsburgh, Pa.

W. M. Rohsenow

Massachusetts Institute of Technology, Cambridge, Mass.

J. Heat Transfer 89(1), 90-98 (Feb 01, 1967) (9 pages) doi:10.1115/1.3614328 History: Received July 30, 1965; Online August 25, 2011


A study is made of film boiling of a saturated nitrogen flowing upward through a uniformly heated tube. Visual experimental observations demonstrate that the annular flow regime which exists at very low qualities is broken up at higher qualities to form a dispersed flow of liquid droplets in a vapor matrix. Analysis of experimentally determined tube wall temperature distributions shows that a significant amount of vapor superheat is present throughout the film-boiling process. A method is presented by which both an upper bound and an estimated value of the heat-transfer coefficient for the dispersed flow regime may be calculated.

Copyright © 1967 by ASME
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