Principle and experimental study of a combined teardrop and heart-shaped channel bluffbody valveless piezoelectric pump

In this study, we have developed a piezoelectric pump with a combined teardrop- and heart-shaped channel based on the Coanda effect and bionics principle. The bluffbody consists of teardrop- and heart-shaped channels. The vibration and the pump flow rate are evaluated theoretically, and the flow con...

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Bibliographic Details
Published in:Review of scientific instruments 2024-06, Vol.95 (6)
Main Authors: Yu, Dahai, Hu, Renhui, Han, Lintong, Yang, Jingwei, He, Lipeng
Format: Article
Language:English
Subjects:
Bionics
Coanda effect
Flow resistance
Flow velocity
Microfluidic devices
Piezoelectricity
Principles
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Summary:In this study, we have developed a piezoelectric pump with a combined teardrop- and heart-shaped channel based on the Coanda effect and bionics principle. The bluffbody consists of teardrop- and heart-shaped channels. The vibration and the pump flow rate are evaluated theoretically, and the flow conditions under different bluffbody heights and different main channel widths are simulated. The theoretical and simulation results show that the pump has uneven resistance to flow in forward and reverse directions, and the height of the teardrop bluffbody and the width main channel affect the flow in the channel. Test data show that under the same pressure, when the main channel is 5 mm and the bluffbody height is 8 mm, the pump flow rate is 460.8 ml/min. The pump alleviates the serious backflow problem through the fluid blocking structure and is expected to become an active driver of microfluidic devices.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0199263