A valveless piezoelectric pump with novel flow path design of function of rectification to improve energy efficiency

Zhang, Jianhui; Chen, Xiaosheng; Chen, Zhenlin; Dai, Jietao; Zhang, Fan; Ma, Min; Huo, Yuxuan; Gui, Zhenzhen

doi:10.1007/s11465-022-0685-3

Cited by 5 publications

(3 citation statements)

References 57 publications

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“…Tesla valve is one of non-mechanical passive valves [46]. With no moving part (or fixed geometry valve) that overcome the drawback of check valve such as wear and fatigue failure, but their output pump efficiency is limited to about 19-27% [47][48][49] (backward flow cannot be blocked completely which is one of the biggest drawbacks in microfluidic system) [50,51]. The Tesla valve is easily miniaturized, resulting in improved operational stability, ascendability, versatility, reliability, and ease of fabrication across a wide range of materials [52].…”

Section: Introductionmentioning

confidence: 99%

Finger-Actuated Micropump of Constant Flow Rate without Backflow

et al. 2023

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This paper presents a finger-actuated micropump with a consistent flow rate and no backflow. The fluid dynamics in interstitial fluid (ISF) extraction microfluidics are studied through analytical, simulation, and experimental methods. Head losses, pressure drop, diodocity, hydrogel swelling, criteria for hydrogel absorption, and consistency flow rate are examined in order to access microfluidic performance. In terms of consistency, the experimental result revealed that after 20 s of duty cycles with full deformation on the flexible diaphragm, the output pressure became uniform and the flow rate remained at nearly constant levels of 2.2 μL/min. The flow rate discrepancy between the experimental and predicted flow rates is around 22%. In terms of diodicity, when the serpentine microchannel and hydrogel-assisted reservoir are added to the microfluidic system integration, the diodicity increases by 2% (Di = 1.48) and 34% (Di = 1.96), respectively, compared to when the Tesla integration (Di = 1.45) is used alone. A visual and experimentally weighted analysis finds no signs of backflow. These significant flow characteristics demonstrate their potential usage in many low-cost and portable microfluidic applications.

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Section: Introductionmentioning

confidence: 99%

Finger-Actuated Micropump of Constant Flow Rate without Backflow

et al. 2023

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“…When the bluff body having a streamlined structure is used in the incoming flow direction and the blocked flow type structure is used in the reverse direction, the flow performance can be greatly improved. 12 Inspired by the shape of desert sand dunes, a valveless crescent-shaped dune piezoelectric pump structure was proposed in this article. The pump flow equation was established by analyzing the working principle of the pump and the liquid resistance structure of the sand dune, the influence of the degree of inclination, sand ridge radius and order on the pump outlet flow characteristics is also studied.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the characteristics of valveless piezoelectric pump with crescent dune bluff body

Xie,

Zhou,

Zhang

et al. 2023

Science Progress

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To improve the output flow characteristics of the piezoelectric pump in one direction, a new valveless piezoelectric pump with a crescent dune bluff body has been proposed. The pump can achieve low damage to the active substance on the premise that the active cell can guarantee the transport volume. By comparing with the hemispherically deficient and imitated meniscus resistance fluid, the barchan dune resistance fluid which can effectively improve the unidirectional output of the piezoelectric pump is obtained. Combined with the pump theoretical flow calculation formula, these influencing parameters, the degree of inclination, the sand ridge radius and the order of the crescent dune were analyzed. Finally, an experimental prototype of a valveless piezoelectric pump has been fabricated by 3D printing technology, and the pump flow test is being conducted. The relationship between frequency, voltage and output flow has been obtained. The test results show that with a dune inclination of 37.5, a sand ridge radius of 6.75 mm and a dune order of 4, the flow rate of the piezoelectric pump is best at 194.7 mL/min. The experimental results agree with the simulation results, showing the effectiveness of the valveless piezoelectric pump structure.

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