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Prediction of Flow Distribution in Gas-Liquid Two-Phase Annular Flows in a Rod Bundle Under Hydraulically Equilibrium Condition

[+] Author Affiliations
Akimaro Kawahara, Michio Sadatomi, Nobutaka Aoyama, Satoru Tanoue

Kumamoto University, Kumamoto, Japan

Paper No. FEDSM2003-45369, pp. 1399-1406; 8 pages
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME


Subchannel flow distributions of both gas and liquid phases under a hydraulically equilibrium condition have been investigated experimentally and analytically for two-phase annular flows in a vertical channel simulating a BWR fuel rod bundle. In the experiment, data on two-phase flow rates in subchannels were obtained for several equilibrium annular flows. In the analysis, a simple, one dimensional, one pressure, two-fluid model has been applied to calculate the flow distributions. In addition, an equation of identical-wall-shear-stress between subchannels was incorporated as a closure equation for the analysis. From a comparison between the calculation and the experiment, the present analysis was found to be promising.

Copyright © 2003 by ASME



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