Accurate analyses of turbulence structure and void fraction distribution are quite important in designing and safety evaluation of various industrial equipments using gas-liquid two-phase flow such as nuclear reactor, etc. Using turbulence model of two-phase flow and models of bubble behaviors in bubble flow and slug flow, systematic analyses of distributions of void fraction, averaged velocity and turbulent velocity were carried out and compared with experimental data. In bubbly flow, diffusion of bubble and lift force are dominant in determining void fraction distribution. On the other hand, in slug flow, large scale turbulence eddies which convey bubbles into the center of flow passage are important in determining void fraction distribution. In turbulence model, one equation turbulence model is used with turbulence generation and turbulence dissipation due to bubbles. Mixing length due to bubble is also modeled. Using these bubble behavior models and turbulence models, systematic predictions were carried out for void distributions and turbulence distributions for wide range of flow conditions of two phase flow including bubbly and slug flow. The results of predictions were compared with experimental data in round straight tube with successful agreement. In particular, concave void distributions in bubbly flow and convex distribution in slug flow were well predicted based on the present model.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Analysis of Turbulence Structure and Void Fraction Distribution in Gas-Liquid Two-Phase Flow Under Bubbly and Slug Flow Regime Available to Purchase
Isao Kataoka,
Isao Kataoka
Osaka University, Suita, Osaka, Japan
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Kenji Yoshida,
Kenji Yoshida
Osaka University, Suita, Osaka, Japan
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Tsutomu Ikeno,
Tsutomu Ikeno
Nuclear Fuel Industries, Ltd., Kumatori, Osaka, Japan
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Tatsuya Sasakawa,
Tatsuya Sasakawa
Nuclear Fuel Industries, Ltd., Kumatori, Osaka, Japan
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Koichi Kondo
Koichi Kondo
Marine Technical College, Kobe, Japan
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Isao Kataoka
Osaka University, Suita, Osaka, Japan
Kenji Yoshida
Osaka University, Suita, Osaka, Japan
Tsutomu Ikeno
Nuclear Fuel Industries, Ltd., Kumatori, Osaka, Japan
Tatsuya Sasakawa
Nuclear Fuel Industries, Ltd., Kumatori, Osaka, Japan
Koichi Kondo
Marine Technical College, Kobe, Japan
Paper No:
AJK2011-10003, pp. 2417-2424; 8 pages
Published Online:
May 25, 2012
Citation
Kataoka, I, Yoshida, K, Ikeno, T, Sasakawa, T, & Kondo, K. "Analysis of Turbulence Structure and Void Fraction Distribution in Gas-Liquid Two-Phase Flow Under Bubbly and Slug Flow Regime." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 2417-2424. ASME. https://doi.org/10.1115/AJK2011-10003
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