Abstract
Nanoliter droplet formation in a confined T-shaped junction is analyzed in detail in virtue of an experimental visualization system with a high speed camera. The movement of the back interface of the tip of disperse phase penetrated into the continuous phase plays an important role in determining droplet formation time and droplet volume. A simple model of droplet formation time based on the analysis of droplet formation process is developed. Influences of continuous phase viscosity and interfacial tension on droplet formation time and droplet volume are concluded in terms of capillary number together with the mean velocity of continuous phase. It is found that both the capillary number and the flow rate ratio of disperse phase to continuous phase have strong impacts on determining droplet volume. Two empirical equations are derived from the model for predicting droplet formation time and droplet volume, respectively.
Keywords: Microchannel, T-shaped junctions, Nanoliter droplet, Droplet formation time, Droplet volume
Current Nanoscience
Title: Formation of Nanoliter Droplets in a Confined Microfluidic T-Shaped Junction: Formation Time and Droplet Volume
Volume: 5 Issue: 4
Author(s): Yuxiang Zhang, Jing Fan and Liqiu Wang
Affiliation:
Keywords: Microchannel, T-shaped junctions, Nanoliter droplet, Droplet formation time, Droplet volume
Abstract: Nanoliter droplet formation in a confined T-shaped junction is analyzed in detail in virtue of an experimental visualization system with a high speed camera. The movement of the back interface of the tip of disperse phase penetrated into the continuous phase plays an important role in determining droplet formation time and droplet volume. A simple model of droplet formation time based on the analysis of droplet formation process is developed. Influences of continuous phase viscosity and interfacial tension on droplet formation time and droplet volume are concluded in terms of capillary number together with the mean velocity of continuous phase. It is found that both the capillary number and the flow rate ratio of disperse phase to continuous phase have strong impacts on determining droplet volume. Two empirical equations are derived from the model for predicting droplet formation time and droplet volume, respectively.
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Cite this article as:
Zhang Yuxiang, Fan Jing and Wang Liqiu, Formation of Nanoliter Droplets in a Confined Microfluidic T-Shaped Junction: Formation Time and Droplet Volume, Current Nanoscience 2009; 5 (4) . https://dx.doi.org/10.2174/157341309789378023
DOI https://dx.doi.org/10.2174/157341309789378023 |
Print ISSN 1573-4137 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6786 |
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