A review of recent studies on piezoelectric pumps and their applications

Li, Hengyu; Liu, Junkao; Liu, Yingxiang

doi:10.1016/j.ymssp.2020.107393

Cited by 89 publications

(40 citation statements)

References 229 publications

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“…Piezoelectric pumps are composed of a piezoelectric actuator and valve body (Chen et al, 2020;Kaynak et al, 2016;Li et al, 2021; J. T. Mohith et al, 2019;Opekar et al, 2016;Tang et al, 2019;Valdovinos et al, 2014;Wang et al, 2019;Y.-N. Wang & Fu, 2018;Yin et al, 2020). The actuator provides power for the fluid and the valve body plays a diversion role, so as to achieve unidirectional fluid pumping.…”

Section: Vpmgrf and Its Recirculating Flowmentioning

confidence: 99%

A novel valve-less piezoelectric micropump generating recirculating flow

Chen

Gui

et al. 2021

Engineering Applications of Computational Fluid Mechanics

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Microfluidic devices or systems to generate recirculating flow are increasingly utilized in the fields of chemistry, biomedicine, biology, with bottlenecks in integration and miniaturization needed a breakthrough. Here, a concept for a highly integrated valve-less piezoelectric micropump generating recirculating flow (VPMGRF) is proposed, simultaneously realizing innovation in theory and method. Based on fluid inertiaand energy dissipation of vortexes, a novel double-loop tube was designed to achieve fluid flow in different directions along various paths, with the flow characteristics at different cross-sectional areas explored through computational fluid dynamics (CFD). Afterwards, as valve bodies, the double-loop tubes were connected with a piezoelectric-actuated chamber to constitute the VPMGRF, which was followed by establishing a theoretical model of the vibration, fluid dynamics, and net flow rate. Eventually, experimental results showed that VPMGRFs could generate internal recirculating flow and had a pump effect. The maximum net flow rate reached 5.19 mL/min at 8 Hz, corresponding to a vibrator amplitude of 35 μm and an output pressure amplitude of 4.27 kPa. Furthermore, the larger the characteristic length of the cross section, the greater the amplitude of the vibrators, the larger the amplitude of output pressure, and the slower the flow rate.

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Section: Vpmgrf and Its Recirculating Flowmentioning

confidence: 99%

A novel valve-less piezoelectric micropump generating recirculating flow

Chen

Gui

et al. 2021

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

show abstract

“…Among them, piezoelectric pumps have attracted more and more attention for their outstanding advantages such as high energy density, fast response speed, large driving force, and easy integration. According to whether there are valves inside, piezoelectric pumps can be divided into valve piezoelectric pumps and valveless piezoelectric pumps (Singhal et al, 2004;Li et al, 2021). The valve piezoelectric pump has a movable valve, which can avoid backflow and generate a larger output pressure.…”

Section: Introductionmentioning

confidence: 99%

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

Yang

2022

Front. Energy Res.

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In order to solve the problems of large reflux and low output performance of the valveless piezoelectric pump with conical tubes, the valveless piezoelectric pump with hyperbolic tubes was proposed. However, the previous research only paid attention to the difference of forward and reverse flow resistance inside the tubes. For this reason, the prototypes of conical tube valveless piezoelectric pump and hyperbolic tubes valveless piezoelectric pump were fabricated in this paper. The maximum output flow rate of the valveless piezoelectric pump with hyperbolic tubes was 54 ml/min. Subsequently, the size and position of entropy production of the hyperbolic tube and the conical tube were numerically calculated based on entropy production theory in this paper. The results show that the entropy production rate of the hyperbolic tube was significantly lower than that of the conical tube, which is consistent with the experimental results. This research analyzed the energy loss inside the valveless piezoelectric pump by using the entropy generation theory, and provided a new design and research method for improving the output performance of the valveless piezoelectric pump in the future.

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“…Changing the physical structure of piezoelectric pumps to reduce its backflow and improve its output performance is a good method. Zhang et al [14] analyzed several representative piezoelectric pumps from four perspectives: the structural design, working mode, optimization, and application of the piezoelectric pump. Huang et al [15] analyzed and studied the output performance of valveless piezoelectric pumps with vortex diodes.…”

Section: Introductionmentioning

confidence: 99%

Valveless Piezoelectric Pump with Reverse Diversion Channel

et al. 2021

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In order to reduce backflow and improve output performance, a valveless piezoelectric pump with a reverse diversion channel was produced. The channel was designed based on the structure of the Tesla valve, which has no moving parts and can produce a high-pressure drop during reverse flow. Therefore, this special flowing channel can reduce the backflow of a valveless piezoelectric pump, which has the characteristic of one-way conduction. This work first revealed the relationship between the main structural parameters of the Tesla valve and the kinetic energy difference of liquid. Then, by using simulation software, the structure was verified to have the characteristics of effective suppression of the backflow of valveless piezoelectric pumps. Through setting multiple simulations, some important parameters that include the optimal height between the straight channels (H), the optimal angle (α) between the straight channel and the inclined channel, as well as the optimal radius (R) of the channel were confirmed. Finally, a series of prototypes were fabricated to test the output performance of this valveless piezoelectric pump. Comparing the experimental results, the optimal parameters of the Tesla valve were determined. The results suggest that when the parameters of the Tesla valve were H = 8 mm, α = 30°, and R = 3.4 mm, the output performance of this piezoelectric pump became best, which had a maximum flow rate of 79.26 mL/min with a piezoelectric actuator diameter of 35 mm, an applied voltage of 350 Vp-p, and a frequency of 28 Hz. The effect of this structure in reducing the return flow can be applied to fields such as agricultural irrigation.

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A review of recent studies on piezoelectric pumps and their applications

Cited by 89 publications

References 229 publications

A novel valve-less piezoelectric micropump generating recirculating flow

A novel valve-less piezoelectric micropump generating recirculating flow

Entropy Analysis of a Valveless Piezoelectric Pump With Hyperbolic Tubes

Valveless Piezoelectric Pump with Reverse Diversion Channel

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