1. A bidirectional valveless piezoelectric micropump with three chambers applying synthetic jet.
- Author
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He, Xiuhua, Xu, Liang, Zhang, Xitong, and Yang, Song
- Subjects
- *
MICROPUMPS , *PIEZOELECTRICITY , *REYNOLDS number , *MATHEMATICAL models of turbulence , *COMPUTER simulation - Abstract
A new type of valveless piezoelectric micropump is presented. Synthetic jet and Coanda effect are utilized to achieve larger and bidirectional flow rate. The numerical simulation applying the velocity and pressure boundary conditions as well as the SST turbulence model were utilized to research the performance and internal flow state of the micropump. The simulation method was tested by the previous experimental data and the results matched well. The results suggest that the flow rate of the micropump is related to the Reynolds number and frequency. The entrainment flow rate of synthetic jet accounts for over 80% of the total outflow rate. The outflow rate is much larger than the volume change of the micropump chambers. There is an optimal frequency to obtain the maximum flow rate regarding the volume change of the chambers as a constant. The fluctuation of the flow rate decreases with the increase of frequency. When the frequency is higher than 25 Hz, the outflow can be continuous. Working at the Reynolds number of 1000 and optimal frequency of 50 Hz, the flow rate is 6.8 ml/min. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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