Dispersed Flow Film Boiling

[+] Author and Article Information
R. P. Forslund, W. M. Rohsenow

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

J. Heat Transfer 90(4), 399-407 (Nov 01, 1968) (9 pages) doi:10.1115/1.3597531 History: Received November 06, 1967; Revised May 07, 1968; Online August 25, 2011


New data for dispersed flow film boiling of nitrogen are presented for the following conditions: tube diameter 0.228, 0.323, and 0.462 in. ID; length 4 and 8 ft; mass velocity 70,000 to 19,000 lb/hr ft2 ; heat flux 0 to 2500 Btu/hr ft2 ; inlet condition near saturation; exit quality 35 to 315 percent. The previously presented analysis [12] is improved by accounting for droplet breakup due to vapor acceleration, modified drag coefficient on accelerating droplets, and a “Leidenfrost” heat transfer from the wall to the droplets at lower qualities. Measurements are also made to verify the existence of the substantial amount of vapor superheat in the presence of liquid droplets, as predicted by the analysis.

Copyright © 1968 by ASME
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