Investigation on droplet formation in T-shaped microchannel

Gao Cong; Qi Xiaobo; Yang Ruizhuang; Su Lin; Chen Sufen; Li Bo; Wang Lili; Huang Weixing

doi:10.3788/HPLPB20132501.0071

Volume 25 Issue 01

Dec. 2012

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(01): 71-76

Chen Han, Yang Hanwu, Zhang Zicheng, et al. Transverse capacitance coupling UV pre-ionization switch[J]. High Power Laser and Particle Beams, 2013, 25: 2035-2039. doi: 10.3788/HPLPB20132508.2035

Citation:

Gao Cong, Qi Xiaobo, Yang Ruizhuang, et al. Investigation on droplet formation in T-shaped microchannel[J]. High Power Laser and Particle Beams, 2013, 25: 71-76. doi: 10.3788/HPLPB20132501.0071

Chen Han, Yang Hanwu, Zhang Zicheng, et al. Transverse capacitance coupling UV pre-ionization switch[J]. High Power Laser and Particle Beams, 2013, 25: 2035-2039. doi: 10.3788/HPLPB20132508.2035

Citation:

Gao Cong, Qi Xiaobo, Yang Ruizhuang, et al. Investigation on droplet formation in T-shaped microchannel[J]. High Power Laser and Particle Beams, 2013, 25: 71-76. doi: 10.3788/HPLPB20132501.0071

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Investigation on droplet formation in T-shaped microchannel

doi: 10.3788/HPLPB20132501.0071

1.
School of Chemical Engineering,Sichuan University,Chengdu 610065,China;
2.
Research Center of Laser Fusion,CAEP,Mianyang 621900,China;
3.
Institute of Computer Application,CAEP,Mianyang 621900,China

Received Date: 2012-02-12
Rev Recd Date: 2012-05-08
Publish Date: 2013-01-15

Abstract

Abstract

A T-shaped microchannel is efficient for monodispersed droplet formation. In order to get a better understanding, the droplet formation process was investigated by numerical simulation and experiment. Silicon oil and precursory sol for hollow glass microspheres were used as the continuous phase and the dispersed phase respectively. A numerical model of the droplet formation was established on the basis of force analysis for a single droplet. Effects of the flow rates on the droplet size were investigated. The results show that the droplet diameters can be controlled by adjusting the flow rates of both phases. Droplet diameters decrease with the increase of continuous phase flow rate at a given dispersed phase flow rate. There is a range beyond which the effect of the continuous phase flow rate becomes weak. The droplet diameters increase with the increase of dispersed phase flow rate. Droplet diameters calculated by the numerical model are close to those by experiment with a deviation around 10%. Based on the simulation and the video, the droplet experiences two phases, namely, the droplet growing under a quasi-steady situation and the stripping. The results help with a better understanding about the droplet formation in a T-shaped microchannel. They also provide good reference for size control of gel microspheres fabricated by sol-microemulsion-gel process.
- T-shaped microchannel,
- emulsion,
- droplet formation

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