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Condensation and Collapse of Vapor Bubble Injected to Subcooled Pool

[+] Author Affiliations
Ichiro Ueno, Takahito Saiki, Tomohiro Osawa

Tokyo University of Science, Noda, Chiba, Japan

Chungpyo Hong

Kagoshima University, Kagoshima, Kagoshima, Japan

Paper No. ICNMM2013-73190, pp. V001T04A011; 4 pages
  • ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
  • Sapporo, Japan, June 16–19, 2013
  • Conference Sponsors: Fluids Engineering Division, Heat Transfer Division
  • ISBN: 978-0-7918-5559-1
  • Copyright © 2013 by ASME


We pay a special attention to the collapsing processes of vapor bubble injected into a subcooled pool; we try to extract the vapor-liquid interaction by employing a vapor generator that supplies vapor at designated flow rate to the subcooled pool instead of using a immersed heated surface to realize a vapor bubble by boiling phenomenon. This system enables ones to detect a spatio-temporal behavior of a single bubble of superheated vapor exposed to a subcooled liquid. We indicate the condensation rates as functions of the injection velocity of the vapor and the degree of subcooling of the pool. We indicate that an abrupt condensation of the injected vapor results in a fine disturbance over the vapor bubble surface before the collapse stage of the bubble. The wave number is sharply dependent on the degree of subcooling of the pool. The threshold of such a fine disturbance formation over the bubble corresponds with that the occurring condition of the maximum volume reduction rate of the vapor bubble.

Copyright © 2013 by ASME



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