Design and research of the one-way microsphere valve and the PDMS film electromagnetic micropump

Miao, Xiaowei; Lu, Hongguang; Chen, He; Liu, Shihai

doi:10.1007/s10404-022-02571-x

Microfluid Nanofluid

2022

DOI: 10.1007/s10404-022-02571-x

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Design and research of the one-way microsphere valve and the PDMS film electromagnetic micropump

Xiaowei Miao

Hongguang Lu

He Chen

et al.

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2023

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Cited by 2 publications

References 20 publications

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Theoretical and numerical analysis of the flow through a diffuser/nozzle element in pulsatile laminar conditions

Peruzzo

2023

Physics of Fluids

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Diffuser/nozzle pipes produce a directional flow resistance that is often exploited in microcirculation to generate a pumping action. This work presents an approximate time-dependent theoretical solution based on the mechanical energy conservation equation to predict the laminar flow rate through an ideal diffuser/nozzle pump. The theoretical solution is then used to characterize the dimensionless parameters that control the dynamics of the valveless pump in the pulsatile flow regime. A suitable numerical model is also implemented to solve the flow in a parametrized two-dimensional axial-symmetric domain subjected to an oscillating pressure, and its results are used to assess the theoretical solution. The pump dynamics and the main model parameters, such as the energy-loss coefficients, result in the following dependence on the ratios between the viscous force, the advective inertia, and the temporal inertia, i.e., the Reynolds (Red), Womersley (Wod), and Strouhal (St) numbers referred to throat diameter. In particular, The Womersley number plays an essential role in controlling the global energy loss when Red < 100. The flow transition is also investigated and found when Red exceeds a critical value, which increases with Wod. Finally, the pump efficiency is found to reach its maximum when the convective and temporal inertia become comparable, i.e., St=O(1), consistent with the observed range of St in real-world diffuser/nozzle pumps. This optimum range of functioning of the pump is also observed for cerebrospinal pulsatile flow in the Sylvius aqueduct, suggesting that the modeled mechanism is used to promote or enhance cerebrospinal fluid circulation.

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Theoretical and numerical analysis of the flow through a diffuser/nozzle element in pulsatile laminar conditions

Peruzzo

2023

Physics of Fluids

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High-Efficiency 3D-Printed Three-Chamber Electromagnetic Peristaltic Micropump

Chen

Miao²,

Lu³

et al. 2023

Micromachines

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This paper describes the design and characteristics of a three-chamber electromagnetic-driven peristaltic micropump based on 3D-printing technology. The micropump is composed of an NdFeB permanent magnet, a polydimethylsiloxane (PDMS) film, a 3D-printing pump body, bolts, electromagnets and a cantilever valve. Through simulation analysis and experiments using a single chamber and three chambers, valved and valveless, as well as different starting modes, the results were optimized. Finally, it is concluded that the performance of the three-chamber valved model is optimal under synchronous starting conditions. The measurement results show that the maximum output flow and back pressure of the 5 V, 0.3 A drive source are 2407.2 μL/min and 1127 Pa, respectively. The maximum specific flow and back pressure of the micropump system are 534.9 μL/min∙W and 250.4 Pa/W, respectively.

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Design and research of the one-way microsphere valve and the PDMS film electromagnetic micropump

Cited by 2 publications

References 20 publications

Theoretical and numerical analysis of the flow through a diffuser/nozzle element in pulsatile laminar conditions

Theoretical and numerical analysis of the flow through a diffuser/nozzle element in pulsatile laminar conditions

High-Efficiency 3D-Printed Three-Chamber Electromagnetic Peristaltic Micropump

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