Condensation, Film coefficients (Physics), Heat -- Transmission
This theoretical study has been undertaken in order to provide insights into the steady two-dimensional laminar film condensation heat transfer on an isothermal vertical flat wall and a cylindrical surface. Condensation is given to both the pure water vapor and water vapor-air mixture. Only the saturated state of the bulk vapor is considered. The effects of liquid-vapor resistance, gas-solubility in the condensate, thermal diffusion and diffusion thermo are neglected. The presence of air as non-condensing gas has been fully accounted for in this study. The physical properties of the condensate liquid are taken to be those of saturated water at the appropriate temperature. The properties of the vapor region are considered to be constant except for the density of the mixture. The method of solution is based on the numerical techniques of laminar boundary layer theory. By using liquid-vapor interface matching, an approximate integral solution is obtained. In this study, it was found that the presence of a small amount of air as a non-condensing gas in the water vapor-air mixture plays a decisive role in decreasing the condensation heat transfer. The decrease is more pronounced at lower bulk temperature, TV, and higher values of (TV-TW). As the mass fraction of air in the bulk, WΓê₧, increases, the heat transfer decreases monotonically.
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Bishop, Patricia J.
Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Masters Thesis (Open Access)
Ng, Chick-Hong, "Laminar Film Condensation Heat Transfer of Water Vapor-Air Mixture on a Vertical Flat Plate and Cylindrical Surface" (1983). Retrospective Theses and Dissertations. 704.