A Nondimensional Analysis of Boiling Dry a Vertical Channel with a Uniform Heat Flux

[+] Author and Article Information
K. H. Sun, R. B. Duffey, C. Lin

Nuclear Safety and Analysis Department, Electric Power Research Institute, Palo Alto, Calif. 94303

J. Heat Transfer 103(4), 667-672 (Nov 01, 1981) (6 pages) doi:10.1115/1.3244524 History: Received March 20, 1981; Online October 20, 2009


A thermal-hydraulic model has been developed for describing the phenomenon of hydrodynamically-controlled dryout, or the boil-off phenomenon, in a vertical channel with a spatially-averaged or uniform heat flux. The use of the drift flux correlation for the void fraction profile, along with mass and energy balances for the system, leads to a dimensionless closed-form solution for the predictions of two-phase mixture levels and collapsed liquid levels. The physical significance of the governing dimensionless parameters are discussed. Comparisons with data from single-tube experiments, a 3 × 3 rod bundle experiment, and the Three Mile Island nuclear power plant show good agreement.

Copyright © 1981 by ASME
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