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Investigation on Bubble Diameter Distribution in Upward Flow by the Two-Fluid and Multi-Fluid Models

Author

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  • Yongzhong Zeng

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
    Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610039, China)

  • Weilin Xu

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

Abstract

Bubble flow can be simulated by the two-fluid model and the multi-fluid model based on the Eulerian method. In this paper, the gas phase was further divided into several groups of dispersed phases according to the diameter by using the Eulerian-Eulerian (E-E) multi-fluid model. The diameters of bubbles in each group were considered to be the same, and their distributions were reorganized according to a specific probability density function. The experimental data of two kinds of bubble flow with different characteristics were used to verify the model. With the help of the open-source CFD software, OpenFOAM-7.x (OpenFOAM-7.0, produced by OpenFOAM foundation, Reading, England), the influences of the group number, the probability distribution function, and the parameters of different bubble diameters on the calculation results were studied. Meanwhile, the numerical simulation results were compared with the two-fluid model and the experimental data. The results show that for the bubble flow with the unimodal distribution, both the multi-fluid model and the two-fluid model can obtain the distribution of gas volume fraction along the pipe radius. The calculation results of the multi-fluid model agree with the experimental data, while those of the two-fluid model differ greatly from the experimental data, which verifies the advantage of the multi-fluid model in calculating the distribution of gas volume fraction in the polydisperse bubble flow. Meanwhile, the multi-fluid model can be used to accurately predict the distribution of the parameters of each phase of the bubble flow if the reasonable bubble diameter distribution is provided and the appropriate interphase force calculation model is determined.

Suggested Citation

  • Yongzhong Zeng & Weilin Xu, 2021. "Investigation on Bubble Diameter Distribution in Upward Flow by the Two-Fluid and Multi-Fluid Models," Energies, MDPI, vol. 14(18), pages 1-22, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:18:p:5776-:d:634840
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    Cited by:

    1. Liang Feng & Huafeng Zhu & Ying Song & Wenchen Cao & Ziyuan Li & Wenlong Jia, 2022. "Modeling of Gas Migration in Large Elevation Difference Oil Transmission Pipelines during the Commissioning Process," Energies, MDPI, vol. 15(4), pages 1-19, February.
    2. Maksim A. Pakhomov & Viktor I. Terekhov, 2022. "Modeling of Turbulent Heat-Transfer Augmentation in Gas-Droplet Non-Boiling Flow in Diverging and Converging Axisymmetric Ducts with Sudden Expansion," Energies, MDPI, vol. 15(16), pages 1-12, August.

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