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Bubble Dynamics Around a Vertical Heating Element During Nucleate Pool Boiling

[+] Author Affiliations
Ahmed Z. ElGafy, Khalid Lafdi

University of Dayton Research Institute, Dayton, OH

Paper No. HT2003-47442, pp. 597-604; 8 pages
doi:10.1115/HT2003-47442
From:
  • ASME 2003 Heat Transfer Summer Conference
  • Heat Transfer: Volume 2
  • Las Vegas, Nevada, USA, July 21–23, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3694-0 | eISBN: 0-7918-3679-7
  • Copyright © 2003 by ASME

abstract

The present work is a description analytical study to express the bubbles dynamic during nucleate pool boiling arises from boiling of water by a vertical cylindrical heating surface under atmospheric pressure conditions. The study includes the description of bubbles formation, detachment, rise and growth around the vertical heating surface. Different formulas are considered to evaluate each of, the number of active nucleation sites on the heating surface, bubbles departure diameter along the heating surface length, bubbles frequency, bubbles rising velocity and growth rate of the diameter of the bubble through its uprising motion around the vertical heating surface. An equation for evaluating the vapor bubble core volume and its thickness around a vertical heating surface is introduced.

Copyright © 2003 by ASME

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