VARIOUS FORMULAS AND THEIR ACCURACY CONCERNING CONVECTIVE HEAT AND MASS-TRANSFER IN THE VAPOR BOUNDARY-LAYER IN THE CASE OF LAMINAR-FILM CONDENSATION OF BINARY VAPOR MIXTURES

The equations of convective mass transfer are derived from the equations of convective heat transfer by replacing Nu(c) with Sh and Pr(V) with Sc and also (chi+/omega)Gr with (chi/omega)Gr for free-convection condensation. As for forced-convection condensation, the equations of Rose and Fujii et al. and the newly presented equation for mass transfer have almost the same accuracy, although their functional forms are quite different from each other. The accuracy of Rose's equation for heat transfer decreases as the effect of the enthalpy diffusion term increases. As for free-convection condensation, the newly presented equation for mass transfer is applicable in a wider range of W(R) or M in comparison with the previous equation of Fujii et al.