Enhancement of immiscible fluid mixing using passive micromixers to increase the performance of liquid–liquid extraction

Younes Amini, Mohammad Mahdi Shadman, Valiyollah Ghazanfari and Amin Hassanvand
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Younes Amini: Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Mohammad Mahdi Shadman: Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Valiyollah Ghazanfari: Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
Amin Hassanvand: ��Department of Polymer Engineering, Faculty of Engineering, Lorestan University Khorramabad, Iran

International Journal of Modern Physics C (IJMPC), 2023, vol. 34, issue 11, 1-20

Abstract: This paper aims to simulate an immiscible two-phase flow in two-dimensional T-shaped, modified T-shaped, cross-shaped, and modified cross-shaped micromixers numerically. The effects of various parameters, including Capillary number, phase flow rate ratio, and channel width ratio, on the generation of droplets were studied. Also, modification of T-shaped and cross-shaped micromixers was proposed. The results reveal that equidistant tiny droplets are generated in the modified micromixers compared to ordinary geometry under the same conditions. Three types of squeezing regime, laminar regime, and jetting regime were observed in different values of the capillary number. It was also observed that the droplet size decreases with the increase in capillary number. Moreover, this study demonstrates that the multiphase flows in micro-devices are very sensitive to even small changes in the channel geometry.

Keywords: Liquid–liquid extraction (LLE); micromixer; computational fluid dynamics (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1142/S0129183123501498

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