Theory and experimental verification on valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes

Huang, Jun; Zhang, Jianhui; Xun, Xianchao; Wang, Shouyin

doi:10.3901/cjme.2013.03.462

Cited by 31 publications

(15 citation statements)

References 12 publications

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“…He et al, 2020; J. W. Kan et al, 2005;Nguyen & Truong, 2004;Zeng et al, 2016) and those with nonmoving parts. Furthermore, nonmoving parts include conical tubes (He et al, 2017;Tseng et al, 2013), Y-shaped tubes (Huang et al, 2013(Huang et al, , 2016, heterotypic tubes (Izzo et al, 2007), spiral tubes (Leng et al, 2013), vortex diodes (Huang et al, 2019), unsymmetrical chambers with blocks arranged (Xia et al, 2012), etc. The nonmoving parts are based on the flow resistance mechanism to realize unidirectional fluid pumping macroscopically.…”

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

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“…Based on the fractal model of biological vascular network [ 34 ], our research group has designed the multistage Y-shape tube in 2013, and successfully developed a valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes [ 35 , 36 ]. A sketch of the multistage Y-shape treelike bifurcate tube and a photograph of the piezoelectric pump are shown in Figure 1 .…”

Section: Construction Of the Devicementioning

confidence: 99%

Equivalent Circuit Modeling for a Valveless Piezoelectric Pump

Zhang

Wang

Huang

2018

Sensors

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Various kinds of the models had been proposed to explain the relationship between the performance and the structural parameters of valveless piezoelectric pumps, so as to evaluate the functional performance such devices. Among the models, the equivalent circuit model, which converts the multi-field problem of a valveless piezoelectric pump system into a simple circuit problem, is the most simple and clear one. Therefore, the proposed structure and working principle of the valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes are analyzed; then, the equivalent circuit model of the valveless piezoelectric pump is established based on the working principles of this pump and liquid-electric analogy theory. Finally, an experimental study of the pump is carried out, with a comparative analysis of the experimental results and the simulation results of the generated equivalent circuit. The experimental results show that with a driving voltage of 100 V and frequency of 6 Hz, the maximum flow rate of the valveless piezoelectric pump is 1.16 mL/min. Meanwhile, the output current of equivalent circuit also reaches its peak at the frequency of 6 Hz, therefore, indicating a good predictive ability of this model in calculating the maximum output flow rate and best working frequency of valveless piezoelectric pumps.

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“…To improve the high-frequency output performance of valveless piezoelectric pumps, some scholars optimized the structure of pipelines and pump chamber. For example, scholars proposed a valveless piezoelectric pump with Cone-shaped tubes [ 23 ], a valveless piezoelectric pump with Y-shape tubes [ 24 ] and a valveless piezoelectric pump with unsymmetrical slope chamber bottom [ 25 ]. The optimization of the local structure of the valveless piezoelectric pump greatly improves the high-frequency output performance.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical and Experimental Study of a Piezoelectric Pump with Two Elastic Chambers

Zhao

Guo

2020

Sensors

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The paper is a continuation of our work on the dynamic load in piezoelectric pumps. In the study, the dynamic load of liquid in the pipelines was proposed as a key factor that limits the output performance of piezoelectric pumps. To decrease the dynamic load, a piezoelectric pump with two elastic chambers was proposed in our previous published work. In this paper, the performance and key parameters of the piezoelectric pump with two elastic chambers were studied through theoretical analyses and experimental tests. After establishing the mathematical model of the piezoelectric pump with two elastic chambers, the paper theoretically analyzed the performance of the pump and the effect of different structural parameters on the performance. Then prototypes with a range of structural parameters were developed and tested. As revealed from the test results, the elastic chamber effectively decreased the dynamic load of the liquid in the pipelines and the flow rate of the prototype with two elastic chambers was higher than that of the prototype with one or no elastic chamber. However, the elastic chamber did not lead to the increase in the maximum output backpressure of the prototype. Adopting an elastic diaphragm exhibiting a smaller stiffness or a larger diameter could help decrease the dynamic load of the liquid. The elastic chamber more significantly impacted the flow rate of the piezoelectric pump with long pipelines. The pump chamber height had a significant effect on the output performance of the piezoelectric pump with two elastic chambers, which is consistent with the conventional piezoelectric pump. At the height of 0.2 mm, the flow rate of the prototype with two elastic chambers was peaked at 7.7 mL/min; at the height of 0.05 mm, the output backpressure reached the highest of 28.2 kPa. The dynamic load could decrease the amplitude of the piezoelectric vibrator, whereas the prototype with two elastic chambers could effectively reduce the impact of dynamic load on the piezoelectric vibrator. The flow rate decreased almost linearly with the backpressure. Under the same backpressure, the flow rate of the prototype with two elastic chambers was higher than that of the prototype without elastic chamber, and the flow rate difference between the two prototypes gradually decreased with the backpressure.

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Theory and experimental verification on valveless piezoelectric pump with multistage Y-shape treelike bifurcate tubes

Cited by 31 publications

References 12 publications

A novel valve-less piezoelectric micropump generating recirculating flow

A novel valve-less piezoelectric micropump generating recirculating flow

Equivalent Circuit Modeling for a Valveless Piezoelectric Pump

A Theoretical and Experimental Study of a Piezoelectric Pump with Two Elastic Chambers

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