Numerical and experimental investigation of Tesla micromixers with different three-dimensional herringbone structures

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-11-01 DOI:10.1016/j.cep.2024.110040

Duo Sun , Lin Zeng , Yi Yang , Chao Liu , Jiaju Hong , Wenbo Han , Wei Li , Chenyong Wang , Jienan Shen , Hui Yang , Hongpeng Zhang

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Abstract

Laminar flow within channels at the micro- or nano-scale of the microfluidic device restricts the rapid mixing of different fluids, leading to reduced reaction velocity. In this study, different three-dimensional herringbone structures were designed to the Tesla micromixers to enhance transverse flow and vortex flow in the channels. Computational fluid dynamics (CFD) simulation results indicated that the sunken herringbone structure provided the most significant enhancement in mixing. The raised herringbone structure exhibited the best energy performance. When Reynolds number (Re) exceeded 60, the mixing indexes (MI) of the Tesla micromixers were over 90%. The improvement in mixing efficiency by both herringbone structures compensated for the weak mixing performance of the Tesla structure at lower Reynolds numbers (Re=0.2–30). Additionally, the mixing experimental results verified the accuracy of the simulation results. This study could provide guidance for improving the mixing performance of micromixers over a wide range of Reynolds numbers (Re=0–100).

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具有不同三维人字形结构的特斯拉微搅拌器的数值和实验研究

微流控装置微米或纳米尺度通道内的层流限制了不同流体的快速混合，导致反应速度降低。本研究为特斯拉微搅拌器设计了不同的三维人字形结构，以增强通道内的横向流动和涡流。计算流体动力学（CFD）模拟结果表明，下沉式人字形结构的混合效果最显著。凸起的人字形结构表现出最佳的能量性能。当雷诺数（Re）超过 60 时，特斯拉微搅拌器的混合指数（MI）超过 90%。两种人字形结构混合效率的提高弥补了特斯拉结构在较低雷诺数（Re=0.2-30）下混合性能较弱的缺点。此外，混合实验结果验证了模拟结果的准确性。这项研究可为在较宽的雷诺数（Re=0-100）范围内改善微搅拌器的搅拌性能提供指导。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.