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The Visualization Study of Breakup of Drops in T-Shaped Micro-Fluidic Devices
Author(s): 
Pages: 338-341
Year: Issue:  2
Journal: Journal of Engineering Thermophysics

Keyword:  micro-dropletmicro-fluidic chipspassive breakupflow visualization;
Abstract: In this paper,the experimental system was set up to study the symmetrical passive breakup of micro-droplet in T-shaped micro-fluidic chip.The process of the breakup of micro-droplet was observed and the mechanism was studied.In the experiment,the cross section of the micro-channel is 200 μm×100 μm or 100 μm×100 μm Silicone oil and peanut oil were used as continuous phase,while deionized water was used as dispersed phase.For Ca number ranging from 0 to 0.1,four types of droplets’ symmetrical breakup,breakup with tunnels,breakup with discontinuous obstruction,breakup with permanent wall obstruction,non-breakup were captured.Finally,the phase diagram was drawn and empirical correlations about critical Ca number and the non-dimensional length of micro-droplet were obtained to predict the conditions of weather the micro-droplet will breakup in different structure and sizes of micro-fluidic chips.
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