In this paper, forced convective condensation of water vapour on a horizontal flat plate was studied numerically by using ANSYS Fluent software. User-defined functions were developed and added to address the issue of film condensation at the surface of the flat plate. The model assumes that phase change occurs while a vapor-noncondensable gas mixture is in contact with the wall only. The condensation rate is obtained by requiring the condensate-gas interface to be impermeable to the non-condensable gas. | Condensation of water vapor from humid air in forced convection over a flat plate