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On-line Access: 2022-10-20

Received: 2022-03-24

Revision Accepted: 2022-06-29

Crosschecked: 2022-10-21

Cited: 0

Clicked: 196

Citations:  Bibtex RefMan EndNote GB/T7714


Jin-yuan Qian


Zhi-jiang Jin


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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.10 P.783-794


Effect of droplet superficial velocity on mixing efficiency in a microchannel

Author(s):  Jin-yuan QIAN, Lei ZHAO, Xiao-juan LI, Wen-qing LI, Zhi-jiang JIN

Affiliation(s):  Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   jzj@zju.edu.cn

Key Words:  Droplet characteristics, Mixing efficiency, Inner circulation, Droplet superficial velocity

Jin-yuan QIAN, Lei ZHAO, Xiao-juan LI, Wen-qing LI, Zhi-jiang JIN. Effect of droplet superficial velocity on mixing efficiency in a microchannel[J]. Journal of Zhejiang University Science A, 2022, 23(10): 783-794.

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author="Jin-yuan QIAN, Lei ZHAO, Xiao-juan LI, Wen-qing LI, Zhi-jiang JIN",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Effect of droplet superficial velocity on mixing efficiency in a microchannel
%A Jin-yuan QIAN
%A Xiao-juan LI
%A Wen-qing LI
%A Zhi-jiang JIN
%J Journal of Zhejiang University SCIENCE A
%V 23
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%P 783-794
%@ 1673-565X
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2200159

T1 - Effect of droplet superficial velocity on mixing efficiency in a microchannel
A1 - Jin-yuan QIAN
A1 - Lei ZHAO
A1 - Xiao-juan LI
A1 - Wen-qing LI
A1 - Zhi-jiang JIN
J0 - Journal of Zhejiang University Science A
VL - 23
IS - 10
SP - 783
EP - 794
%@ 1673-565X
Y1 - 2022
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2200159

In this study, droplet characteristics including droplet length and formation time, and mixing efficiency in droplets were investigated via the volume of fluid (VOF) method coupled with a user defined scalar (UDS) model. A cross-shaped junction with a square cross-section was designed and used for droplet formation. An initial arrangement which differed from that of a conventional operation was adopted. Results show that when the droplet superficial velocity is constant, the exchange between the dispersed phase velocity and the continuous phase velocity has a marginal effect on the droplet formation time. However, the exchange has a great effect on droplet length. These findings provide a valuable guide for future operation of droplet formation. In addition, the results show that the mixing efficiency in the droplet forming stage can be classified into time-dominated and length-dominated regimes according to the droplet superficial velocity. When a droplet flows in a microchannel, a higher droplet superficial velocity increases mixing efficiency due to the faster inner circulation and shorter droplet length.




Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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