Affiliation:
1. Universite de Franche Comte´, Institut de Ge´nie Energetique, 2, avenue Jean Moulin, 90000 Belfort, France
Abstract
An implicit finite difference scheme is used to solve the problem of condensation of pure vapors flowing vertically downwards around a horizontal tube. The incompressible flow equations coupled at the interface for the liquid and vapor phases are solved. The pressure gradient, inertia, and enthalpy convection terms are retained in this analysis, and the influence of turbulence in the two phases is considered. The calculated results for laminar flow and those from different mixing length turbulence models are compared with experimental results for condensation of steam and R113. The results presented show that the average condensation heat transfer coefficients obtained using Kato’s turbulence model in the condensate film and Pletcher’s model in the vapor phase, are in good agreement with the experimental data.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference53 articles.
1. Asbik, M., Daif, A., and Panday, P. K., 1994, “Condensation of Downward Flowing Vapor on a Single Horizontal Cylinder or a Bank of Tubes With and Without Inundation,” Proc. First ISHMT-ASME Heal Mass Transfer Conference, Bombay, India, ASME, New York.
2. Bellinghausen
R.
, and RenzU., 1992, “Heat Transfer and Film Condensation During Condensation of Steam Flowing at High Velocity in a Vertical Pipe,” Int. J. Heat Mass Transfer, Vol. 35, No. 3, pp. 683–689.
3. Bremhorst
K.
, and KrebsL., 1993, “Eddy Diffusivity Base Comparisons of Turbulent Prandtl Number for Boundary Layer and Free Jet Flows With Reference to Fluids of Very Low Prandtl Number,” ASME JOURNAL OF HEAT TRANSFER, Vol. 115, pp. 549–552.
4. Cavallini, A., Frizzerin, S., and Rossetto, L., 1986, “Condensation of R-l 1 Vapor Flowing Downward Outside a Horizontal Tube Bundle,” Proc. of the 8th Int. Heat Transfer Conference, San Francisco, ASME, New York, pp. 1707–1712.
5. Cheung
T. K.
, and StreetR. L., 1988, “The Turbulent Layer in the Water at an Air-Water Interface,” J. Fluid Mechanics, Vol. 194, pp. 133–151.
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