Microfluidic inertial switch based on J-shape communicating vessels
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This paper presents a novel microfluidic inertial switch which uses J-shape communicating vessels structure and adopts non-toxic brine (NaCl solution) as the working fluid. Firstly, the operational principle of the switch was introduced. Then, the acceleration threshold of the switch was theoretical analyzed. Fluent with VOF and CSF module has been adopted to study the relationship between the acceleration threshold and the structure parameters. Finally, in order to verify the operational principle of the switch, a prototype was fabricated using soft lithography. The acceleration threshold of the switch increases with the decrease of the initial height difference of the two capillary valves, and the decrease of the neck width and outlet length of Valve 2. The measured threshold of the prototype is 92.9g. The error rate between the experimental and theoretical results is less than 5.0%.
This research is supported by National Natural Science Foundation of China, No. 51475245.
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