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An analytical investigation into the Nusselt number and entropy generation rate of film condensation on a horizontal plate Tong Bou Chang
The Journal of Mechanical Science and Technology, vol. 22, no. 11, pp.2134-2141, 2008
Abstract : This study investigates the heat transfer characteristics and entropy generation rate of a condensate film formed on a
horizontal plate with suction at the wall. Applying the minimum mechanical energy principle, the dimensionless liquid
film thickness along the plate is found to vary as a function of the Rayleigh number, the Jakob number, the Prandtl
number and the suction parameter. The governing differential equation of the condensate thickness is solved numerically
by using a finite-difference shooting method. Closed-form analytical expressions are derived for the Nusselt
number and the dimensionless overall entropy generation number. When there is no suction at the wall, the results
obtained from the analytical expression for the Nusselt number are found to be in good agreement with those presented
in the literature.
Keyword :
Film condensation; Minimum entropy generation; Wall suction
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