An Integral Treatment of Two-Phase Boundary Layer in Film Condensation

[+] Author and Article Information
J. C. Y. Koh

Aero-Space Division, Boeing Airplane Company, Seattle, Wash.

J. Heat Transfer 83(3), 359-362 (Aug 01, 1961) (4 pages) doi:10.1115/1.3682285 History: Received August 26, 1960


By using the integral method, the task of solving the complicated two-phase boundary-layer differential equations in laminar-film condensation has been reduced to the simple work of solving an algebraic equation. It was shown analytically that the parameter [(ρμ)L /(ρμ)v ]1/2 can be removed from the film-condensation problem and hence only two parameters, cp ΔT/hfg and Pr, are involved. The calculated results in heat transfer and condensate flow rates agree very well with the results from the exact solution of the boundary-layer equations. With [(ρμ)v /(ρμ)L ]1/2 remaining as a parameter, it is believed that the present method can be used to solve the analogous two-phase boundary-layer problem in laminar film boiling.

Copyright © 1961 by ASME
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