Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

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2004, Volume16

Issue 4

111 pages

DOI: 10.1615/MultScienTechn.v16.i4

Issue price - $140.00

Michio Sadatomi
Dept. of Mechanical System Engineering, Kumamoto University, Kumamoto, 860-8555, Japan

Akimaro Kawahara
Dept. of Mechanical System Engineering, Kumamoto University, Kumamoto, 860-8555, Japan

K. Kano
Dept. of Mechanical Engineering and Materials Science, Kumamoto University, Kumamoto, 860-8555, Japan

S. Machidori
Dept. of Mechanical Engineering and Materials Science, Kumamoto University, Kumamoto, 860-8555, Japan

Following the previous studies, single- and gas-liquid two-phase diversion cross-flows between subchannels have been studied. In the previous experiment, a vertical channel consisting of two circular subchannels of 16 mm i.d. was used as the test channel, while water and air at atmospheric pressure and room temperature as the test fluids. Experimental data on the axial variations of pressure difference between the subchannels, the ratio of flow rate in one subchannel to the whole channel, the void fraction in each subchannel were obtained for bubble, slug-churn, and annular flows in two-phase case. In addition, correlations of cross-flow resistance coefficient for the liquid phase and interfacial friction coefficient were obtained from an analysis of the cross-flow rate data in our latest experiments. In this study, by incorporating these correlations into a cross-flow momentum equation in our subchannel analysis code, which was based on a two-fluid model, flow redistribution processes due to diversion cross-flow have been calculated for various single- and two-phase hydraulically non-equilibrium flows with pressure difference between the subchannels. From a comparison with the experimental data on the flow redistribution processes, the validity of the analysis has been confirmed in the region where the effects of void drift can be neglected.

DOI: 10.1615/MultScienTechn.v16.i4.30 Download article, 309-334 pages

Article price - $45.00

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