Abstract

Laminar boundary layer analysis of film condensation on vertical flat plates with a general temperature distribution at the surface is presented. Using a variable temperature boundary condition at the surfaces of the plate, the difficulties encountered in the conventional similarity analysis applied to a general temperature variation case, are overcome. Solutions are presented for parametric values of this variable, θ 0, and the heat transfer results are developed. These results are compared with the isothermal case under two types of boundary conditions namely(i) the power-law surface temperature variation and (ii) the exponential surface temperature variation. Further, comparison with forced and free convection results indicates that the heat transfer results are influenced to a maximum extent by the nonisothermal boundary conditions.

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