LAMINAR-FILM CONDENSATION ON A HORIZONTAL DISK WITH SUCTION AT THE WALL

The problem of two-dimensional, steady-state film condensation on an isothermal horizontal disk with suction at the porous wall is studied for the case in which a cold plate faces upward. The dimensionless film thickness along the disk is found to be a function of parameter Ja/Pr (Jakob number/Prandtl number) and the suction parameter S(w). An essential part of the present analysis is the use of the condition that the boundary layer depth at the disk edge is equal to a critical(minimum) depth. The dimensionless heat transfer coefficients are also found to be functions of parameters Ja/Pr and Ra/Ja. Furthermore, the dimensionless heat transfer coefficient increases as suction parameter S(w) increases.