SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2025, Vol. 77 ›› Issue (1): 293-300.DOI: 10.1016/j.cjche.2024.10.009

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Numerical simulation of vortex breakdown in a cylindrical tank with rotating bottom and free surface using level set method

Zepeng Zhao1, Qin Li1, Feng Ye1, Haoliang Wang2, Jianfeng Wang3, Hui Yu1, Xiangyang Li1, Chao Yang2   

  1. 1. School of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Petroleum Molecular & Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    3. School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
  • 收稿日期:2024-08-16 修回日期:2024-10-22 接受日期:2024-10-24 出版日期:2025-01-28 发布日期:2024-11-22
  • 通讯作者: Haoliang Wang,E-mail:hlwang17@ipe.ac.cn;Xiangyang Li,E-mail:xyli2065@scu.edu.cn
  • 基金资助:
    National Natural Science Foundation of China (22178228, 22178326) are gratefully acknowledged.

Numerical simulation of vortex breakdown in a cylindrical tank with rotating bottom and free surface using level set method

Zepeng Zhao1, Qin Li1, Feng Ye1, Haoliang Wang2, Jianfeng Wang3, Hui Yu1, Xiangyang Li1, Chao Yang2   

  1. 1. School of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Petroleum Molecular & Process Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    3. School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
  • Received:2024-08-16 Revised:2024-10-22 Accepted:2024-10-24 Online:2025-01-28 Published:2024-11-22
  • Contact: Haoliang Wang,E-mail:hlwang17@ipe.ac.cn;Xiangyang Li,E-mail:xyli2065@scu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (22178228, 22178326) are gratefully acknowledged.

摘要: A cylindrical chamber with a rotating bottom holds significant potential for application in cell culture bioreactors due to its ability to generate more stable swirling flows. In order to control vortex breakdown within the chamber, this study first establishes a computational fluid dynamics simulation coupled with the level set method. Verified by experimental results in literature, this method accurately simulates the position and shape of vortex breakdown, and also predicts the critical Reynolds numbers for the appearance and detachment of vortex breakdown bubbles from the center. Additionally, it precisely captures the gas—liquid interface and depicts the vortex breakdown phenomenon in the air above the liquid for the first time. Finally, it predicts the impact of physical property of gas—liquid systems on vortex breakdown in response to significant changes in viscosity of microbial process systems.

关键词: Vortex breakdown, Level set, Microbial cultivation, Micro-bioreactor

Abstract: A cylindrical chamber with a rotating bottom holds significant potential for application in cell culture bioreactors due to its ability to generate more stable swirling flows. In order to control vortex breakdown within the chamber, this study first establishes a computational fluid dynamics simulation coupled with the level set method. Verified by experimental results in literature, this method accurately simulates the position and shape of vortex breakdown, and also predicts the critical Reynolds numbers for the appearance and detachment of vortex breakdown bubbles from the center. Additionally, it precisely captures the gas—liquid interface and depicts the vortex breakdown phenomenon in the air above the liquid for the first time. Finally, it predicts the impact of physical property of gas—liquid systems on vortex breakdown in response to significant changes in viscosity of microbial process systems.

Key words: Vortex breakdown, Level set, Microbial cultivation, Micro-bioreactor