Laminar film condensation on a horizontal wavy plate embedded in a porous medium

The problem of two-dimensional, steady-state film condensation on an isothermal finite-size horizontal wavy plate embedded in a porous medium is studied for the case in which the plate faces upward into a region of dry saturated vapor. Due to capillary effects, a two-phase zone is formed between the liquid film on the cold plate and the vapor zone. Taking the sand–water–steam system for illustration purposes, the results indicate that the inclusion of capillary effects in the liquid film analysis has a significant effect on the computed results for the heat transfer coefficient. The results also reveal that the wave number and the wave amplitude of the wavy plate both have a significant effect on the mean Nusselt number, .