Abstract
An analytical study is made into the process of heat transfer with the vapor condensation on a horizontal elliptical tube under the simultaneous effects of the forces of surface tension and gravity on the condensate film. Analytical expressions for both local condensate film thickness and heat transfer coefficient around the elliptical periphery have been derived under the effects of gravity and surface tension for various values of ellipticity, respectively. The dimensionless mean heat transfer coefficient − Nu for any ellipticity e and various Bond numbers Bo has been obtained; however, it is almost unaffected by surface tension force due to surface curvature changing. For special objects (vertical plate e = 1, circular tube e = 0), the results are identical to some classical Nusselt-type solutions.
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