The Vaporization of Superheated Sodium in a Vertical Channel

[+] Author and Article Information
Ralph M. Singer, Robert E. Holtz

Reactor Analysis and Safety Div., Argonne National Laboratory, Argonne, Ill.

J. Heat Transfer 94(3), 300-304 (Aug 01, 1972) (5 pages) doi:10.1115/1.3449936 History: Received February 27, 1970; Revised January 11, 1971; Online August 11, 2010


Measurements of the vapor growth patterns and rates following the nucleation of superheated sodium in a vertical rectangular channel are presented and discussed. The vapor was found to grow as a single bubble for incipient bulk-liquid superheats greater than about 10 deg C, and this single bubble tended to completely fill the channel cross section (except for a thin liquid film on the walls) and to grow as a vapor slug for incipient bulk-liquid superheats greater than about 50 deg C. The temperature gradients in the liquid both normal and parallel to the channel axis prior to nucleation were found to have an important effect upon the dynamics of the vapor slug. Experimental data on the vapor growth and collapse rates and the associated pressure transients are presented for boiling pressures up to 1 atm and incipient superheats up to about 180 deg C.

Copyright © 1972 by ASME
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