A numerical and experimental study of an efficient micromixer at low Reynolds number using vibration signal

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-08-21 DOI:10.1016/j.cherd.2025.08.029

Minghang Li , Ye Chen , Guang Yang , Songtao Li , Chaoming Wu , Chaoqun Xiang

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Abstract

In this paper, a piezoelectric micromixer with a serpentine channel is developed, and its mixing characteristics are discussed. The vibration characteristics analysis determined an excitation voltage of 160 V and resonance frequencies of 3.672 kHz and 29.179 kHz. Compared with the control group, which showed no vibration signals under different Reynolds numbers in the laminar flow state, the maximum mixing efficiencies of the first and third order modes increased to over 90 % and 80 % respectively. The results show that the larger the amplitude of the first order mode, the stronger the promoting effect on fluid diffusion. Additionally, the mixing performance of different viscous fluids was analyzed, demonstrating that vibration signals still enhance the mixing of highly viscous fluids. The research results confirm that vibration signals can improve the mixing efficiency of a simple-structured micromixer. This provides new ideas and methods for the development of active micromixer technology, and has great potential in the fields of chemical analysis and reactions, providing accuracy and scalability for applications in lab-on-a-chip systems.

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利用振动信号对低雷诺数高效微混合器进行了数值和实验研究

本文研制了一种具有蛇形通道的压电微混合器，并对其混合特性进行了讨论。振动特性分析确定激励电压为160 V，共振频率为3.672 kHz和29.179 kHz。与层流状态下不同雷诺数均无振动信号的对照组相比，一阶和三阶模态的最大混合效率分别提高到90% %和80% %以上。结果表明：一阶模态振幅越大，对流体扩散的促进作用越强；此外，对不同黏度流体的混合性能进行了分析，表明振动信号对高黏度流体的混合仍有促进作用。研究结果证实，振动信号可以提高结构简单的微混合器的混合效率。这为有源微混合器技术的发展提供了新的思路和方法，在化学分析和反应领域具有巨大的潜力，为芯片实验室系统的应用提供了准确性和可扩展性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.