Accurate prediction of the interfacial area concentration is essential to successful development of the interfacial transfer terms in the two-fluid model. Mechanistic modeling of the interfacial area concentration entirely relies on accurate local flow measurements over extensive flow conditions and channel geometries. From this point of view, accurate measurements of flow parameters such as void fraction, interfacial area concentration, gas velocity, bubble Sauter mean diameter, and bubble number density were performed by the image processing method at five axial locations in vertical upward bubbly flows using 1.02 and 0.55 mm-diameter pipes. The frictional pressure loss was also measured by a differential pressure cell. In the experiment, the superficial liquid velocity and the void fraction ranged from 0.475 m/s to 4.89 m/s and from 0.980% to 28.6%, respectively. The obtained data give near complete information on the time-averaged local hydrodynamic parameters of two-phase flow. These data can be used for the development of reliable constitutive relations which reflect the true transfer mechanisms in two-phase flow. As the first step to understand the flow characteristics in mini-channels, the applicability of the existing drift-flux model, interfacial area correlation, and frictional pressure correlation was examined by the data obtained in the mini-channels.
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14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4245-2
PROCEEDINGS PAPER
Axial Development of Gas-Liquid Two-Phase Flow in Mini-Channels
Junichi Uematsu,
Junichi Uematsu
Tokyo University of Marine Science and Technology, Tokyo, Japan
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Yoshinori Hirose,
Yoshinori Hirose
Tokyo University of Marine Science and Technology, Tokyo, Japan
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Tatsuya Hazuku,
Tatsuya Hazuku
Tokyo University of Marine Science and Technology, Tokyo, Japan
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Tomoji Takamasa,
Tomoji Takamasa
Tokyo University of Marine Science and Technology, Tokyo, Japan
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Takashi Hibiki
Takashi Hibiki
Kyoto University, Sennan, Osaka, Japan
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Junichi Uematsu
Tokyo University of Marine Science and Technology, Tokyo, Japan
Yoshinori Hirose
Tokyo University of Marine Science and Technology, Tokyo, Japan
Tatsuya Hazuku
Tokyo University of Marine Science and Technology, Tokyo, Japan
Tomoji Takamasa
Tokyo University of Marine Science and Technology, Tokyo, Japan
Takashi Hibiki
Kyoto University, Sennan, Osaka, Japan
Paper No:
ICONE14-89612, pp. 689-698; 10 pages
Published Online:
September 17, 2008
Citation
Uematsu, J, Hirose, Y, Hazuku, T, Takamasa, T, & Hibiki, T. "Axial Development of Gas-Liquid Two-Phase Flow in Mini-Channels." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 4: Computational Fluid Dynamics, Neutronics Methods and Coupled Codes; Student Paper Competition. Miami, Florida, USA. July 17–20, 2006. pp. 689-698. ASME. https://doi.org/10.1115/ICONE14-89612
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