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Enhancing flow characteristic and system performance in micropump with heart valve mechanical behavior

Hsin-Yi Lai (National Cheng Kung University, Tainan, Taiwan)
Jing-Hao Kang (National Cheng Kung University, Tainan, Taiwan)

Engineering Computations

ISSN: 0264-4401

Article publication date: 19 December 2022

Issue publication date: 14 February 2023




This study aims to solve the problems of low flow rate and low efficiency of micropumps in high-frequency applications. This micropump system was proposed to meet the requirements of 1–5 ml/min for microthrusters or drug delivery devices.


In this paper, a comprehensive analysis indicator and numerical procedure were disclosed and used to demonstrate the fluid dynamic characteristics and performance of a micropump. Accordingly, the reliability of the two-way coupling calculation was ensured through mutual verification of the real structure and the numerical system.


The research results indicate that the Polydimethylsiloxane (PDMS) microchannel can realize the contraction and expansion mechanism, allowing the fluid to generate different levels of pressure gradient during the working stroke and also enhancing the characteristics of energy consumption and storage of the flow field.


The pressure gradient between the fluid and PDMS microchannel can facilitate the improvement of the fluid backflow in a micropump. Therefore, in terms of performance improvement, the PDMS micropump increased the maximum backflow and optimum efficiency by approximately 50 and 90%, respectively.



Lai, H.-Y. and Kang, J.-H. (2023), "Enhancing flow characteristic and system performance in micropump with heart valve mechanical behavior", Engineering Computations, Vol. 40 No. 1, pp. 1-21.



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