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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

AN INTEGRAL TECHNIQUE FOR PREDICTING WALL AND INTERFACIAL SHEAR STRESS IN TURBULENT, CONDENSING, ANNULAR-MIST FLOW

Get access (open in a dialog) DOI: 10.1615/IHTC6.190
pages 425-430

Аннотация

An analytical study was made of the flow mechanics of the liquid film region in a turbulent, condensing, annular-mist flow. An expression for the eddy viscosity variation in the liquid film, based on van Driest's model, suitably modified for the presence of interfacial drag and mass transfer, is proposed. Combining the eddy viscosity expression with an independent equation derived for the shear stress distribution yielded the dimensionless velocity distribution in the liquid film. A whole family of velocity distribution profiles is shown to occur in the developing annular liquid layer depending on a parameter κp (which characterizes interfacial effects and is the square root of the ratio of the gas to liquid momentum fluxes), as compared to the single universal velocity distribution in full-pipe flow. Finally, the use of the continuity equation enabled the prediction of the wall and interfacial shear stresses for any given values of liquid Reynolds number, the liquid layer thickness, and the parameter κp.