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Measurements of Bubble Rise Characteristics in Various Temperatures and Liquid Velocities

[+] Author Affiliations
Kazuhiro Torimoto, Masanori Nishiura, Tomoe Tanaka, Tomio Okawa, Isao Kataoka

Osaka University, Suita, Osaka, Japan

Paper No. ICONE10-22759, pp. 1025-1031; 7 pages
doi:10.1115/ICONE10-22759
From:
  • 10th International Conference on Nuclear Engineering
  • 10th International Conference on Nuclear Engineering, Volume 4
  • Arlington, Virginia, USA, April 14–18, 2002
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-3598-7 | eISBN: 0-7918-3589-8
  • Copyright © 2002 by ASME

abstract

Single bubble rise characteristics in turbulent flow in a vertical circular pipe were experimentally observed. As a result, it was found that bubble rise velocity relative to the time averaged local liquid velocity decreases with the increase of liquid flowrate and that it also decreases with the decrease of the distance between a bubble and wall. Investigating the mechanisms of the reductions of relative velocity, new correlations were developed for accurately evaluating the bubble rise velocities in turbulent flow. Since the predicted bubble rise velocities reasonably agreed with the measured data, the new correlations could contribute to the improvement of bubbly flow calculations in nuclear reactor safety analysis.

Copyright © 2002 by ASME

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