TY  - JOUR
AU  - Shen, Xiuzhong
AU  - Yamamoto, Toshihiro
AU  - Han, Xu
AU  - Hibiki, Takashi
PY  - 2023
TI  - Interfacial area concentration in gas–liquid metal two-phase flow
JO  - Experimental and Computational Multiphase Flow
SN  - 2661-8869
SP  - 84
EP  - 98
VL  - 5
IS  - 1
AB  - 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.
UR  - https://doi.org/10.1007/s42757-021-0110-x
DO  - 10.1007/s42757-021-0110-x