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Chaotic advection and mass transfer of viscous liquid–liquid flows in a novel 3D serpentine microchannel
AIChE Journal ( IF 3.5 ) 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
AIChE Journal ( IF 3.5 ) 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
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 λM 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 ReO decreases. The relationships of MI with λM and Fc and the relationship of ME with ReO are established.
更新日期：2024-12-20
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