NDLI: Effects of geometric configuration on droplet generation in Y-junctions and anti-Y-junctions microchannels

Content Provider	Springer Nature Link
Author	Liu, Zhao Miao Liu, Li Kun Shen, Feng
Copyright Year	2015
Abstract	Droplets generation in Y-junctions and anti-Y-junctions microchannels are experimentally studied using a high speed digital microscopic system and numerical simulation. Geometric configuration of a microchannel, such as Y-angle ( $$90^{\circ },\, 135^{\circ }, -90^{\circ }$$ and $$-135^{\circ }$$ ), channel depth and other factors have been taken into consideration. It is found that droplets generated in anti-Y-junctions have a smaller size and a shorter generation cycle compared with those in Y-junctions under the same experimental conditions. Through observing the internal velocity field, the vortex appearing in continuous phase in anti-Y-junctions is one of the key factors for the difference of droplet size and generation cycle. It is found that droplet size is bigger and generation cycle is longer when the absolute angle value of the intersection between the continuous and the dispersed phases (i.e., the angle between the main channel and the continuous phase or the dispersed phase channel) increases. The droplet’s size is influenced by the Y-angle, which varies with the channel depth in Y-junctions. The Y-angle has a positive effect on the droplet generation cycle, but a smaller height–width ratio will enhance the impact of a continuous and dispersed phase’s intersection angle on the droplet generation cycle in Y-junctions microchannels.
Starting Page	741
Ending Page	749
Page Count	9
File Format	PDF
ISSN	05677718
Journal	Acta Mechanica Sinica
Volume Number	31
Issue Number	5
e-ISSN	16143116
Language	English
Publisher	The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences
Publisher Date	2015-08-25
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Microfluidics Y-junctions and anti-Y-junctions microchannels Y-angle Height–width ratio in cross section Theoretical and Applied Mechanics Classical Continuum Physics Engineering Fluid Dynamics Computational Intelligence
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Computational Mechanics

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