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Development of Lift-Off Diameter Model of Bubbles Generated on Horizontal Tube

[+] Author Affiliations
Sung Uk Ryu, Seok Kim, Dong-Jin Euh

Korea Atomic Energy Research Institute, Daejeon, Korea

Paper No. IMECE2014-36826, pp. V08BT10A055; 5 pages
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 8B: Heat Transfer and Thermal Engineering
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4956-9
  • Copyright © 2014 by ASME


In this study, the theoretical correlation for the lift-off diameter of bubbles generated on a horizontal tube is proposed. A force balance analysis in the direction normal to the heated surface at the moment of the bubble lift-off was performed to develop the model. According to the developed model, the bubble lift-off diameter depends strongly on the azimuthal position of the horizontal tube, the relative velocity between a bubble and surrounding liquid, the properties of the bubble, and the liquid. The developed model can be applicable to define the sub-model of wall heat flux partitioning for natural and forced convective boiling.

Copyright © 2014 by ASME
Topics: Bubbles



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