Multiphase Science and Technology A Quarterly

ISSN for PRINT: 0276-1459

For Online Access

Best Paper Award Selection - Editorial Board Site

2007, Volume19

Issue 4

90 pages

DOI: 10.1615/MultScienTechn.v19.i4

Issue price - $193.00

Mamoru Ozawa
Department of Mechanical Engineering, Kansai University, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

T. Ami
Kansai University, Suita, Osaka, Japan

Hisashi Umekawa
Kansai University, Department of Mechanical Engineering, Yamate-cho 3-3-35, Suita, Osaka 564-8680, Japan

M. Shoji
Department of Mechanical Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, Kanagawa 221-8686; and Energy Technology Research Institute, AIST, 1-2-1 Namiki, Tsukuba, Ibaraki 305-8564, Japan

Gas-liquid two-phase flow is a typical complex system with intrinsic spatiotemporal fluctuation in phase distribution, pressure drop, heat transfer, and so on, being an important subject left behind after extensive research on two-phase flow dynamics. Previously developed modeling is not appropriate in application to CHF problems at low quality and/or in downward flow. This is mainly because conventional modeling, including two-fluid modeling, is based on the continuous flow hypothesis. The proposed model, represented by the discrete bubble model, consists of a void propagation equation as a global rule and only a limited number of mechanical and geometrical relationships as local rules, i.e., a wake effect, gas compressibility, and a phase redistribution mechanism. Neglecting detailed mechanisms of two-phase flow, the spatiotemporal fluctuations in void fraction and pressure drop are numerically realized within the framework of the pattern dynamics approach.

DOI: 10.1615/MultScienTechn.v19.i4.30 Download article, 343-361 pages

Article price - $45.00

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