Void fraction estimation within rod bundles based on three-fluid model and comparison with x-ray CT void data

T. Mitsutake, Shinichi Morooka, K. Suzuki, S. Tsunoyama, K. Yoshimura

Research output: Contribution to journalArticle

22 Citations (Scopus)


An interfacial shear stress equation in the dispersed-annular two-phase flow regime has been developed, which is based on a three-fluid model consisting of a liquid film on a rod, vapor and entrained liquid associated with a vapor flow. It is an extension of J.G.M. Andersen's procedure that provides a two-fluid interfacial shear stress equation using the drift flux parameters C0 and Vgj. This interfacial shear stress equation can take into account a phase and velocity distribution through an equivalence between the drift flux parameters and the interfacial shear stress. Using the three-fluid subchannel analysis code TEMPO with the three-fluid interfacial shear stress model, the capability of a three-fluid calculation using the drift flux parameters C0 and Vgj that reproduce a measured void fraction is demonstrated. A comparison was made with advanced X-ray computed tomography (CT) void fraction data within a 4×4 rod bundle in diabatic 1 MPa pressure conditions. The three-fluid velocity field was estimated to be in good agreement with the experimental result of a void fraction.

Original languageEnglish
Pages (from-to)203-212
Number of pages10
JournalNuclear Engineering and Design
Issue number2-3
Publication statusPublished - 1990 Jun 2
Externally publishedYes


ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Civil and Structural Engineering
  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality

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