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The Effect of the Marangoni Flow on the Film Condensation

[+] Author Affiliations
Baohong Peng, Li Yang, Juan Wen

Hebei University of Technology, Tianjin, China

Paper No. MNHMT2009-18020, pp. 97-101; 5 pages
doi:10.1115/MNHMT2009-18020
From:
  • ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer
  • ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 2
  • Shanghai, China, December 18–21, 2009
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 978-0-7918-4390-1 | eISBN: 978-0-7918-3864-8
  • Copyright © 2009 by ASME

abstract

The objective of this paper is to quantify the effect of Marangoni flow on the vapor film condensation and analyzed the effect of the gravity, the shearing force at the gas-liquid interface and the Marangoni strength caused by the surface tension on the Nusselt number. The results show that the effect of the gravity is very clear to the thickness of the film. Marangoni effect can not be ignored at zero gravity condition. The effect of the vapor Reynolds number (Rev0) at the zero-gravity conditions on the film is bigger than that at the gravity conditions. The average ratio of the film thickness (δ̄) is 6.5% at the gravity conditions and 21.5% at zero-gravity conditions when the Rev0 changes from 8000 to 15000.

Copyright © 2009 by ASME

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