LAMINAR FILM CONDENSATION OF A SATURATED AND SUPERHEATED VAPOR ON A SURFACE WITH A CONTROLLED TEMPERATURE DISTRIBUTION
Measurements of local heat flux for control led condensing surface temperatures during film condensation
on a vertical cylindrical surface are reported. These results are considered to have enhanced precision
and their relationship to earl ier work suggests that deviation from boundary layer theoretical analysis
is due to the combined effects of surface roughness and 1iquid-vapor interfacial instability. Measurements
were made in the film Reynolds number range between 50 and 500. Average film condensation heat
transfer coefficients were obtained from condensation rate measurements and these results compared very
closely with the averages obtained from local measurements. Experiments were performed using both saturated and superheated vapor.