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Turbulent Film Condensation on a Nonisothermal Horizontal Tube

Published online by Cambridge University Press:  05 May 2011

Yan-Ting Lin  and
Sheng-An Yang
Yan-Ting Lin*
Affiliation:
Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan 807, R.O.C.
Sheng-An Yang*
Affiliation:
Department of Mold and Die Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan 807, R.O.C.
*
* Postgraduate student
** Professor
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Abstract

A simple model has been developed for the study of turbulent film condensation from downward flowing vapors onto a horizontal circular tube with variable wall temperature. The interfacial shear at the vapor condensate film is evaluated with the help of Colburn analogy. The condensate film flow and local/or mean heat transfer characteristics from a horizontal tube with non-uniform temperature variation under the effect of Froude number, sub-cooling parameter and system pressure parameter has been conducted. Although the non-uniform wall temperature variation has an appreciable influence on the local film flow and heat transfer; however, the dependence of mean heat transfer on the non-uniform wall temperature variation is almost negligible.

Keywords

TurbulentFilm condensationVariable wall temperatureTube
Type
Articles
Information
Journal of Mechanics , Volume 21 , Issue 4 , December 2005 , pp. 235 - 242
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2005

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