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A visualized investigation of bubble breakup in a swirl-venturi bubble generator
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  • Haiyan Bie,
  • Yunxia Li,
  • licheng Xue,
  • Yue Wang,
  • Gang Liu,
  • Zongrui Hao,
  • weizhong An
Haiyan Bie
Ocean University of China

Corresponding Author:[email protected]

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Yunxia Li
Ocean University of China - Laoshan Campus
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licheng Xue
Ocean University of China - Laoshan Campus
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Yue Wang
Qilu University of Technology (Shandong Academy of Sciences)
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Gang Liu
Qilu University of Technology (Shandong Academy of Sciences)
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Zongrui Hao
Qilu University of Technology (Shandong Academy of Sciences)
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weizhong An
Ocean University of China - Laoshan Campus
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Abstract

The dynamics and breakup of bubbles in swirl-venturi bubble generator (SVBG) are explored in this work. The three-dimensional movement process and breakup phenomena of bubbles are captured by one high-speed camera system with two cameras while the distribution of swirling flow field are recorded through Particle Image Velocimetry technology. It is revealed that bubbles have two motion trajectories, which are deeply related to bubble breakup. One trajectory is that mother bubble moves upward in an axial direction of the SVBG to the diverging section, and the other trajectory is that mother bubble rotates obliquely upward to another side-wall along the radial direction. Meanwhile, binary breakup, shear-off-induced breakup, static erosive breakup and dynamic erosive breakup are observed. For relatively high liquid Reynolds number, vortex flow regions are extended and the bubble size is reduced. Furthermore, it is worth noting that the number of microbubbles increases significantly for intensive swirling flow.
17 Mar 2022Submitted to AIChE Journal
21 Mar 2022Submission Checks Completed
21 Mar 2022Assigned to Editor
29 Mar 2022Reviewer(s) Assigned
19 Apr 2022Editorial Decision: Revise Major
03 Jun 20221st Revision Received
05 Jun 2022Assigned to Editor
05 Jun 2022Submission Checks Completed
07 Jun 2022Reviewer(s) Assigned
29 Jun 2022Editorial Decision: Revise Major
09 Aug 20222nd Revision Received
09 Aug 2022Submission Checks Completed
09 Aug 2022Assigned to Editor
16 Aug 2022Reviewer(s) Assigned
24 Aug 2022Editorial Decision: Accept
27 Sep 2022Published in AIChE Journal. 10.1002/aic.17892