Note on the Flow of Vapor Between Liquid Surfaces

The mass flow of vapor from a liquid surface at temperature T0 to another surface of the same liquid at temperature T1(T1<T0) may be very readily determined in the case of one-dimensional flow from the conservation relations for mass and momentum. These relations involve both the coefficient of evaporation and the coefficient of condensation. It is therefore possible to determine the condensation coefficient which has heretofore not been accessible to measurement. A new method for determining the evaporation coefficient is also made available. The temperature of the vapor between the liquid surfaces may also be found when viscous effects in the vapor flow are neglected.