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Multiphase Science and Technology

Publicou 4 edições por ano

ISSN Imprimir: 0276-1459

ISSN On-line: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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MODELLING OF TWO-PHASE DIVERSION CROSS-FLOW BETWEEN SUBCHANNELS BASED ON A TWO-FLUID MODEL

Volume 16, Edição 4, 2004, pp. 309-334
DOI: 10.1615/MultScienTechn.v16.i4.30
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RESUMO

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.

CITADO POR
  1. Agbodemegbe V.Y., Cheng Xu, Akaho E.H.K, Allotey F.K.A, Correlation for cross-flow resistance coefficient using STAR-CCM+ simulation data for flow of water through rod bundle supported by spacer grid with split-type mixing vane, Nuclear Engineering and Design, 285, 2015. Crossref

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