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Measurement of droplet coalescence in a mixing tank
  • +3
  • Yubin Cai,
  • Zhongshu Yang,
  • Yijing Jin,
  • Shan Jing,
  • Wenjie Lan,
  • Shaowei Li
Yubin Cai
Tsinghua University Institute of Nuclear and New Energy Technology
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Zhongshu Yang
Tsinghua University Institute of Nuclear and New Energy Technology
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Yijing Jin
Tsinghua University Institute of Nuclear and New Energy Technology
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Shan Jing
Tsinghua University

Corresponding Author:[email protected]

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Wenjie Lan
China University of Petroleum Beijing College of Chemical Engineering
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Shaowei Li
Tsinghua University Institute of Nuclear and New Energy Technology
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Abstract

It is in urgent requirement to directly measure the droplet coalescence frequency for the application of the population balance model. In this study, a method was firstly developed to directly measure the droplet coalescence frequency in turbulent flow field by using a specially designed mixing tank and a high-speed camera. The effects of the rotating speed and holdup fraction on the droplet coalescence frequency was quantitatively investigated. The increasing of rotation speed promotes first and then inhibits the coalescence, while the holdup fraction has little influence on the coalescence frequency function. The droplet collision frequency was also counted and the coalescence efficiency was calculated. The models in literature were tested with our experimental data and were found failing to predict the coalescence frequency in the stirring tank. Empirical correlations were finally proposed and good agreement was found between the prediction results and the experimental data.
14 Jun 2023Submitted to AIChE Journal
18 Jun 2023Submission Checks Completed
18 Jun 2023Assigned to Editor
18 Jun 2023Review(s) Completed, Editorial Evaluation Pending
02 Jul 2023Reviewer(s) Assigned
14 Aug 2023Editorial Decision: Revise Minor
27 Aug 20231st Revision Received
31 Aug 2023Submission Checks Completed
31 Aug 2023Assigned to Editor
31 Aug 2023Review(s) Completed, Editorial Evaluation Pending
01 Sep 2023Reviewer(s) Assigned
06 Oct 2023Editorial Decision: Accept