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Acadlore takes over the publication of IJCMEM from 2025 Vol. 13, No. 3. The preceding volumes were published under a CC BY 4.0 license by the previous owner, and displayed here as agreed between Acadlore and the previous owner. ✯ : This issue/volume is not published by Acadlore.

Open Access
Research article

Determination of Droplet Velocity in Square Microchannel

Jin-Yuan Qian1,2,3,
Xiao-Juan Li1,
Zan Wu3,
Zhen Cao3,
Bengt Sunden3
1
Institute of Process Equipment, College of Energy Engineering, Zhejiang University, PR China.
2
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, PR China.
3
Department of Energy Sciences, Lund University, Sweden.
International Journal of Computational Methods and Experimental Measurements
|
Volume 10, Issue 1, 2022
|
Pages 62-73
Received: N/A,
Revised: N/A,
Accepted: N/A,
Available online: N/A
View Full Article|Download PDF

Abstract:

Generally, droplet velocity in liquid-liquid two-phase flow in microchannel is obtained via droplet displacement and time interval precise determination in sequential photos/videos. The precision is tightly related to shutter speed of the camera. In this paper, a novel method called direct image method is proposed to predict the droplet velocity. The droplet velocity can be easily obtained in one snapshot by this method. In order to validate the accuracy of this novel method, experiments are carried out in water-butanol, water-hexane and water-oil (Mogul Trafo CZ-A Paramo) systems. The droplet velocity predicted by this direct image method shows a good agreement with the experimental data. Although the assumptions which has been used to determine the droplet velocity still need to be improved, this method can be useful in industrial application.

Keywords: Direct image method, Droplet velocity, Square microchannel

1. Introduction

2. Experimental Setup

3. The Direct Image Method for Determining Droplet Velocity

4. Measurement of Droplet Characteristics

5. Conclusions

Acknowledgments

This work is supported by the National Natural Science Foundation of China (NSFC) through grant no. 51805470. This work is also financially supported by the Swedish Research Council.

References
1.
Wang, K. & Luo, G., Microflow extraction: A review of recent development. Chemical Engineering Science, 169, pp. 18–33, 2017. Wang, K. & Luo, G., Microflow extraction: A review of recent development. Chemical Engineering Science, 169, pp. 18–33, 2017. [Crossref]
2.
Qian, J., Li, X., Wu, Z., Jin, Z. & Sunden, B., A comprehensive review on liquid–liq- uid two-phase flow in microchannel: flow pattern and mass transfer. Microfluidics and Nanofluidics, 23(10), 2019. [Crossref]
3.
Yao, C., Zhao, Y., Ma, H., et al., Two-phase flow and mass transfer in microchannels: A review from local mechanism to global models. Chemical Engineering Science, 229, p. 116017, 2021. [Crossref]
4.
Garstecki, P., Fuerstman, M.J., Stone, H.A. & Whitesides, G.M., Formation of droplets and bubbles in a microfluidic T-junction—scaling and mechanism of break-up. Lab on a Chip, 6(3), p. 437, 2006. [Crossref]
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Madadelahi, M., Madou, M.J., Nokoorani, Y.D., et al., Fluidic barriers in droplet- based centrifugal microfluidics: Generation of multiple emulsions and microspheres. Sensors and Actuators B: Chemical, 311, p. 127833, 2020. snb.2020.127833 [Crossref]
6.
Liu, C., Zhang, Q., Zhu, C., Fu, T., Ma, Y. & Li, H.Z., Formation of droplet and “string of sausages” for water-ionic liquid ([BMIM][PF6]) two-phase flow in a flow-focusing device. Chemical Engineering and Processing - Process Intensification, 125, pp. 8–17, 2018. [Crossref]
7.
Zhang, S., Guivier-Curien, C., Veesler, S. & Candoni, N., Prediction of sizes and fre- quencies of nanoliter-sized droplets in cylindrical T-junction microfluidics. Chemical Engineering Science, 138, pp. 128–139, 2015. [Crossref]
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Korczyk, P.M., van Steijn, V., Blonski, S., et al., Accounting for corner flow unifies the understanding of droplet formation in microfluidic channels. Nature Communications, 10, p. 2528, 2019. [Crossref]
9.
Yao, C., Liu, Y., Xu, C., Zhao, S. & Chen, G., Formation of liquid–liquid slug flow in a microfluidic T-junction: Effects of fluid properties and leakage flow. AIChE Journal, 64(1), pp. 346–357, 2018. [Crossref]
10.
Bai, L., Fu, Y., Zhao, S. & Cheng, Y., Droplet formation in a microfluidic T-junction involving highly viscous fluid systems. Chemical Engineering Science, 145, pp. 141– 148, 2016. [Crossref]
11.
Cao, Z., Wu, Z. & Sundén, B., Dimensionless analysis on liquid-liquid flow patterns and scaling law on slug hydrodynamics in cross-junction microchannels. Chemical Engi- neering Journal, 344, pp. 604–615, 2018. [Crossref]
12.
Plouffe, P., Roberge, D.M. & Macchi, A., Liquid–liquid flow regimes and mass transfer in various micro-reactors. Chemical Engineering Journal, 300, pp. 9–19, 2016. https:// doi.org/10.1016/j.cej.2016.04.072
13.
Xu, L., Lee, H., Panchapakesan, R. & Oh, K.W., Fusion and sorting of two parallel trains of droplets using a railroad-like channel network and guiding tracks. Lab on a Chip, 12(20), p. 3936, 2012. [Crossref]
14.
Salim, A., Fourar, M., Pironon, J. & Sausse, J., Oil-water two-phase flow in microchan- nels: Flow patterns and pressure drop measurements. The Canadian Journal of Chemi- cal Engineering, 86(6), pp. 978–988, 2008. [Crossref]
15.
Yagodnitsyna, A.A., Kovalev, A.V. & Bilsky, A.V., Flow patterns of immiscible liquid- liquid flow in a rectangular microchannel with T-junction. Chemical Engineering Jour- nal, 303, pp. 547–554, 2016. [Crossref]
16.
Li, Q. & Angeli, P., Experimental and numerical hydrodynamic studies of ionic liquid- aqueous plug flow in small channels. Chemical Engineering Journal, 328, pp. 717–736, 2017. [Crossref]
17.
Ma, R., Zhang, Q., Fu, T., Zhu, C., Wang, K., Ma, Y. & Luo, G., Manipulation of micro- droplets at a T-junction: Coalescence and scaling law. Journal of Industrial and Engi- neering Chemistry, 65, pp. 272–279, 2018. [Crossref]
18.
Mohmmed, A.O., Nasif, M.S., Al-Kayiem, H.H. & Time, R.W., Measurements of translational slug velocity and slug length using an image processing technique. Flow Measurement and Instrumentation, 50, pp. 112–120, 2016. flowmeasinst.2016.06.016 [Crossref]
19.
Kashid, M.N., Renken, A. & Kiwi-Minsker, L., CFD modelling of liquid–liquid multi- phase microstructured reactor: Slug flow generation. Chemical Engineering Research & Design, 88(3), pp. 362–368, 2010. [Crossref]
20.
Ghaini, A., Mescher, A. & Agar, D.W., Hydrodynamic studies of liquid–liquid slug flows in circular microchannels. Chemical Engineering Science, 66(6), 1168–1178, 2011. [Crossref]
21.
Yao, C., Zhao, Y. & Chen, G., Multiphase processes with ionic liquids in microreactors: Hydrodynamics, mass transfer and applications. Chemical Engineering Science, 189, pp. 340–359, 2018. [Crossref]
22.
Fairbrother, F. & Stubbs, A., Studies in electro-endosmosis Part VI The ‘‘bubble tube” method of measurement. Journal of the Chemical Society, pp. 527–529, 1935. https:// doi.org/10.1039/jr9350000527
23.
Di Miceli Raimondi, N., Prat, L., Gourdon, C. & Tasselli, J., Experiments of mass transfer with liquid–liquid slug flow in square microchannels. Chemical Engineering Science, 105, pp. 169–178, 2014. [Crossref]
Cite this:
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MLA Style
Chicago Style
GB-T-7714-2015
Qian, J. Y., Li, X. J., Wu, Z., Cao, Z., & Sunden, B. (2022). Determination of Droplet Velocity in Square Microchannel. Int. J. Comput. Methods Exp. Meas., 10(1), 62-73. https://doi.org/10.2495/CMEM-V10-N1-62-73
J. Y. Qian, X. J. Li, Z. Wu, Z. Cao, and B. Sunden, "Determination of Droplet Velocity in Square Microchannel," Int. J. Comput. Methods Exp. Meas., vol. 10, no. 1, pp. 62-73, 2022. https://doi.org/10.2495/CMEM-V10-N1-62-73
@research-article{Qian2022DeterminationOD,
title={Determination of Droplet Velocity in Square Microchannel},
author={Jin-Yuan Qian and Xiao-Juan Li and Zan Wu and Zhen Cao and Bengt Sunden},
journal={International Journal of Computational Methods and Experimental Measurements},
year={2022},
page={62-73},
doi={https://doi.org/10.2495/CMEM-V10-N1-62-73}
}
Jin-Yuan Qian, et al. "Determination of Droplet Velocity in Square Microchannel." International Journal of Computational Methods and Experimental Measurements, v 10, pp 62-73. doi: https://doi.org/10.2495/CMEM-V10-N1-62-73
Jin-Yuan Qian, Xiao-Juan Li, Zan Wu, Zhen Cao and Bengt Sunden. "Determination of Droplet Velocity in Square Microchannel." International Journal of Computational Methods and Experimental Measurements, 10, (2022): 62-73. doi: https://doi.org/10.2495/CMEM-V10-N1-62-73
QIAN J Y， LI X J， WU Z， et al. Determination of Droplet Velocity in Square Microchannel[J]. International Journal of Computational Methods and Experimental Measurements， 2022， 10(1)： 62-73. https://doi.org/10.2495/CMEM-V10-N1-62-73