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Numerical Simulation and Experimental Investigation of Droplet Splitting in Symmetric Y-type Bifurcation Microchannels
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[1]ZHENG Yanping,ZHANG Ruigen,LIANG Shuai,et al.Numerical Simulation and Experimental Investigation of Droplet Splitting in Symmetric Y-type Bifurcation Microchannels[J].Journal of Zhengzhou University (Engineering Science),2022,43(01):55-61.[doi:10.13705/j.issn.1671-6833.2021.05.022]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 43 Number of periods: 2022 01 Page number: 55-61 Column: Public date: 2022-01-09
Title:
Numerical Simulation and Experimental Investigation of Droplet Splitting in Symmetric Y-type Bifurcation Microchannels
Author(s):
ZHENG Yanping1;  ZHANG Ruigen1;  LIANG Shuai2;  LI Yang1;  XU Gang1;  SHU Haitao1
1.School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China; 
2.Guangdong Shunde Innovation Design Institute, Foshan 528311, China
Keywords:
microfluidics;  droplet formation;  droplet splitting;  numerical simulation;  Y-type bifurcation
CLC:
O35
DOI:
10.13705/j.issn.1671-6833.2021.05.022
Abstract:
Using the two-phase flow VOF model in the ANSYS Fluent software, a three-dimensional dynamic model of the droplet in the microfluidic chip passing through the symmetric Y-type bifurcation microchannel was established, and the dynamic simulation of the droplet flow and the simulation result of the droplet interface evolution were realized. It was consistent with the experimental results to verify the effectiveness of the model. Through this model, the splitting behavior of the droplet passing through the symmetric Y-type bifurcation microchannel and the evolution process of the pressure field and velocity field during the droplet splitting process were studied, and the breaking mechanism of the droplet under four different flow patterns and diffe-rent stages was revealed. The relationship between the flow pattern of the droplet and the capillary number Ca and the droplet size was obtained; according to the various flow pattern data obtained by the simulation, the prediction of the droplet rupture and non-rupture boundary under the model was obtained by fitting in MATLAB equation. This research not only provided a simple and effective method for droplet splitting, but also had potential application value in the fields of biomedicine, energy chemical industry and food engineering.
References:
[1] 林炳承,秦建华.微流控芯片实验室[J].色谱,2005(5):456-463.
[2] UTADA A S,LORENCEAU E,LINK D R,et al.Monodisperse double emulsions generated from a microcapillary device[J].Science,2005,308(5721):537-541.
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Last Update: 2022-01-09
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