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Research Article

Interfacial area concentration in gas–liquid metal two-phase flow

Xiuzhong Shen1( ), Toshihiro Yamamoto1, Xu Han2, Takashi Hibiki3
Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
Department of Nuclear Engineering, Kyoto University, Kyoto daigaku-katsura, Nishikyo-ku, Kyoto, 615-8540, Japan
Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China
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Abstract

The characterization and modelling of the flow features in gas and heavy liquid metal two-phase flow are required for the development of next generation nuclear reactor systems. In this study, the past experimental studies performed in the gas–liquid metal two-phase flow are reviewed, and the void fraction and interfacial area concentration (IAC) database taken in the N2–Pb/Bi (nitrogen and lead/bismuth eutectic alloy) two-phase flow in a vertical circular flow channel are collected. In order to obtain the flow characteristics of the gas–liquid metal two-phase flow, the experimental data of the N2–Pb/Bi two-phase flow are compared with experimental data of the air–water two-phase flow. The void fraction gradient along the height (namely the flow direction) and the bubble diameter in the N2–Pb/Bi two-phase flow are found to be much larger than those in the air–water two-phase flow. These two unique flow characteristics can be explained, respectively, by the large density and surface tension of the Pb/Bi eutectic alloy in the N2–Pb/Bi two-phase flow. This study also reviewed the available IAC correlations and found that so far no IAC correlation has been developed for the gas–liquid metal two-phase flow. So, the available major IAC correlations for air– and steam–water two-phase flows are collected and compared with the collected experimental data of the N2–Pb/Bi two-phase flow. The comparison shows that these IAC correlations cannot give reliable predictions for the experimental data of the N2–Pb/Bi two-phase flow. So, a new IAC correlation has been developed based on the experimental data of the N2–Pb/Bi two-phase flow by taking into account the properties and flow characteristics of the two phases. The newly-developed IAC correlation can satisfactorily predict the experimental data of the N2–Pb/Bi two-phase flow with the mean relative error of 0.0609.

Keywords

modellinggas–liquid metal two-phase flowinterfacial area concentration (IAC)lead bismuth eutectic alloyflow characteristic

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Experimental and Computational Multiphase Flow
Volume 5 Issue 1,
March 2023
Pages 84-98
DOI: 10.1007/s42757-021-0110-x
Cite this article:
Shen X, Yamamoto T, Han X, et al. Interfacial area concentration in gas–liquid metal two-phase flow. Experimental and Computational Multiphase Flow, 2023, 5(1): 84-98. https://doi.org/10.1007/s42757-021-0110-x

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Received: 21 February 2021
Accepted: 15 April 2021
Published: 02 August 2021
© Tsinghua University Press 2021
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