[1]郑艳萍,张瑞根,梁帅,等.对称Y型分岔微通道微滴分裂数值模拟与实验探究[J].郑州大学学报(工学版),2022,43(01):55-61.[doi:10.13705/j.issn.1671-6833.2021.05.022]
　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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对称Y型分岔微通道微滴分裂数值模拟与实验探究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年01期
页码:
55-61
栏目:
出版日期:
2022-01-09

文章信息/Info

Title:
Numerical Simulation and Experimental Investigation of Droplet Splitting in Symmetric Y-type Bifurcation Microchannels
作者:
郑艳萍; 张瑞根; 梁帅; 李洋; 徐刚; 舒海涛
郑州大学机械与动力工程学院;广东顺德创新设计研究院;

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
关键词:
Keywords:
microfluidics;  droplet formation;  droplet splitting;  numerical simulation;  Y-type bifurcation
分类号:
O35
DOI:
10.13705/j.issn.1671-6833.2021.05.022
文献标志码:
A
摘要:
本文在Fluent软件中利用VOF模型研究了微流控芯片中微滴通过对称Y型微通道的分裂行为，与试验结果的吻合度较高，主要得到以下结论，在对称Y型分岔微通道中观察到四种流态，即永久阻塞破裂型、暂时阻塞破裂型、只接触Y型分岔处破裂型和非破裂型。通过毛细数Ca的增加，微滴变形的上游压力增大，加速实现微滴的分裂。微滴尺寸的减小使得微滴的形状由柱状变为球形，微滴的变形能力减弱，形成非破裂的流动状态。本研究不仅为微滴分裂提供一种有效方法，在生物医学、能源化工及食品工程等领域也具有潜在应用价值。
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.

参考文献/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.

更新日期/Last Update: 2022-01-09