Chaotic advection and mass transfer of viscous liquid–liquid flows in a novel 3D serpentine microchannel

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2024-12-20 DOI:10.1002/aic.18701

Jiecai Long, Congkai Xie, Haojun Zhang, Xuan Zhang, Jingsong Yao, Rongguang Zhang, Xun Chen, Xin Chen

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Abstract

This article aimed to study the characteristics of chaotic advection and mass transfer of viscous liquid–liquid flows in a novel 3D serpentine microchannel (TSM) with hybrid structures. The TSM and its corresponding experimental setup are established, and the CFD model is verified through flow field visualization experiments. Results reveal that efficient chaotic convection in TSM is achieved through continuous irregular spatial fluid deformation. The Lyapunov exponents greater than zero indicate the existence of chaotic behavior, and the maximum lineal stretch rate λ_M increases linearly with the characteristic Reynolds number. The mass transfer characteristics are evaluated by diffusion mass transfer number Φ and mass transfer field synergy number Fc quantitatively. The mixing index MI shows an increasing trend as Fc increases, while the mixing effectiveness ME decreases as the outlet Reynolds number Re_O decreases. The relationships of MI with λ_M and Fc and the relationship of ME with Re_O are established.

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新型三维蛇形微通道中粘性液-液流动的混沌平流和传质

本文研究了一种新型三维蛇形混合结构微通道（TSM）中黏性液-液流动的混沌平流和传质特性。建立了TSM及其相应的实验装置，并通过流场可视化实验对CFD模型进行了验证。结果表明，TSM中的高效混沌对流是通过连续的不规则空间流体变形实现的。Lyapunov指数大于零表明存在混沌行为，最大线性拉伸率λM随特征雷诺数线性增加。通过扩散传质数Φ和传质场协同数Fc定量评价了传质特性。混合指数MI随Fc的增大而增大，混合效率ME随出口雷诺数ReO的减小而减小。建立了MI与λM和Fc的关系以及ME与ReO的关系。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.