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Open AccessArticle

Flow Channel Influence of a Collision-Based Piezoelectric Jetting Dispenser on Jet Performance

by Can Zhou 1,2,3, Guiling Deng 1,3,*, Junhui Li 1,3,* and Ji’an Duan 1,3,*
1
School of Mechanical and Electronical Engineering, Central South University, No. 932, South Lushan Road, Changsha 410083, China
2
School of Information Science and Engineering, No.932, South Lushan Road, Changsha 410083, China
3
State Key Laboratory of High Performance Complex Manufacturing, No. 932, South Lushan Road, Changsha 410083, China
*
Authors to whom correspondence should be addressed.
Sensors 2018, 18(4), 1270; https://doi.org/10.3390/s18041270
Received: 12 March 2018 / Revised: 14 April 2018 / Accepted: 17 April 2018 / Published: 20 April 2018
(This article belongs to the Special Issue Piezoelectric Micro- and Nano-Devices)
To improve the jet performance of a bi-piezoelectric jet dispenser, mathematical and simulation models were established according to the operating principle. In order to improve the accuracy and reliability of the simulation calculation, a viscosity model of the fluid was fitted to a fifth-order function with shear rate based on rheological test data, and the needle displacement model was fitted to a nine-order function with time based on real-time displacement test data. The results show that jet performance is related to the diameter of the nozzle outlet and the cone angle of the nozzle, and the impacts of the flow channel structure were confirmed. The approach of numerical simulation is confirmed by the testing results of droplet volume. It will provide a reliable simulation platform for mechanical collision-based jet dispensing and a theoretical basis for micro jet valve design and improvement. View Full-Text
Keywords: flow channel influence; bi-piezoelectric jet; mechanical-electrical-fluid simulation; microelectronics packaging flow channel influence; bi-piezoelectric jet; mechanical-electrical-fluid simulation; microelectronics packaging
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MDPI and ACS Style

Zhou, C.; Deng, G.; Li, J.; Duan, J. Flow Channel Influence of a Collision-Based Piezoelectric Jetting Dispenser on Jet Performance. Sensors 2018, 18, 1270.

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