Droplet Size and Shape in a Flow-Focusing Microdevice

Wei Zhang; Zhi Yuan Niu; Chao Qun Wu; Jin Liang Xu

doi:10.4028/www.scientific.net/AMR.634-638.2144

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 634-638Droplet Size and Shape in a Flow-Focusing...

Droplet Size and Shape in a Flow-Focusing Microdevice

Abstract:

In droplet-based biochemical microreactors, the reaction rate, the content of chemicals, and the composition of final products have to be involved with the individual droplet size. The common method to determine droplet size is by the straightforward measuring of the 2D images recorded by a high speed camera from the top view, regardless of the real droplet shapes. However, this method is not always true due to the droplet deformation by the combined effects of viscous drag and channel confinements. Here we report that the real droplet could be spherical, hemispherical or flattend disk, leading to different droplet sizes even for the same 2D profiles from the top view. The new findings of this paper are crucial to avoid the improper estimation of droplet size for the droplet-based microfluidic applications.

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Periodical:

Advanced Materials Research (Volumes 634-638)

Pages:

2144-2149

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.2144

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Online since:

January 2013

Authors:

Wei Zhang, Zhi Yuan Niu, Chao Qun Wu, Jin Liang Xu

Keywords:

Droplet, Flow-Focusing, Micro-Fluidics, Microreactor

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