Further aspects of dropwise condensation theory

Abstract The theoretical dependence of heat-transfer coefficient on maximum drop size [1] is incorporated in a new calculation giving the dependence of sweeping frequency and heat-transfer coefficient on distance down the condensing surface. Both results are in satisfactory agreement with earlier observations. The height-dependence of the heat-transfer coefficient is shown to be extremely weak. It is also shown that the nucleation site density is deducible from an equation for the distribution of drop sizes [1] and that the values obtained are in satisfactory agreement with optical and electron microscope measurements.