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Laminar Vapor-Gas-Drop Flow in Vertical Ribbed Tubes

[+] Author Affiliations
Hossein Shokouhmand, Amir Ahmadzadegan

University of Tehran, Tehran, Iran

Paper No. ESDA2006-95265, pp. 225-230; 6 pages
  • ASME 8th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 4: Fatigue and Fracture, Heat Transfer, Internal Combustion Engines, Manufacturing, and Technology and Society
  • Torino, Italy, July 4–7, 2006
  • ISBN: 0-7918-4251-7 | eISBN: 0-7918-3779-3
  • Copyright © 2006 by ASME


A 3-dimensional Eulerian finite volume approach is used to predict heat and mass transfer in a laminar two-phase gas-vapor-drop flow in a ribbed tube. It is well known that extending heat transfer area enhances heat transfer and this is the base of studying ribbed faces. It is shown that ribbed faces can be more effective in two phase mist flows since evaporation and deposition of droplets mostly take place near hot surface [1]. Parallel ribs are analyzed. Vapor mass concentration and droplets diameter are calculated by separate transport equations. Analysis is continued from thermally inlet to fully developed vapor gas flow. This model can be used in many applications to understand the effects of changing parameters of hydrodynamics and thermodynamics of the flow, when the flow regime is changed from turbulent to laminar. The results are compared to single phase gas flow.

Copyright © 2006 by ASME



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