Chapter 10 Boiling and CondensationCondensation Heat Transfer 10-34C Condensation is a vapor-to-liquid phase change process. It occurs when the temperature of a vapor is reduced belowits saturation temperature Tsat. This is usually done by bringing the vapor into contact with a solid surface whose temperature Tsis belowthe saturation temperature Tsatof the vapor. 10-35CIn film condensation, the condensate wets the surface and forms a liquid film on the surface which slides down under the influence of gravity. The thickness of the liquid film increases in the flow direction as more vapor condenses on the film. This is how condensation normally occurs in practice. In dropwise condensation,the condensed vapor forms droplets on the surface instead of a continuous film, and the surface is covered by countless droplets of varying diameters. Dropwise condensation is a much more effective mechanism of heat transfer.
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This note was uploaded on 01/24/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.