Characterization of dissimilar liquids mixing in T-junction and offset T-junction microchannels

Micromixing process in microfluidic devices has been broadly employed in bio-, nano-, and environmental technologies using either miscible or immiscible liquids. However, there are limited experimental studies investigating the mixing process of different densities and viscosities liquids in relatio...

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Veröffentlicht in:Proceedings of the Institution of Mechanical Engineers. Part E, Journal of process mechanical engineering Journal of process mechanical engineering, 2021-12, Vol.235 (6), p.1797-1806
Hauptverfasser: Ringkai, H, Tamrin, KF, Sheikh, NA, Barroy, P
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container_end_page 1806
container_issue 6
container_start_page 1797
container_title Proceedings of the Institution of Mechanical Engineers. Part E, Journal of process mechanical engineering
container_volume 235
creator Ringkai, H
Tamrin, KF
Sheikh, NA
Barroy, P
description Micromixing process in microfluidic devices has been broadly employed in bio-, nano-, and environmental technologies using either miscible or immiscible liquids. However, there are limited experimental studies investigating the mixing process of different densities and viscosities liquids in relation to microfluidics. Therefore, the mixing process of propan-2-ol and water, water and sodium chloride solution, propan-2-ol and sodium chloride solution were experimented and reported at 5 ≤ Re ≤ 50 in T-junction and offset T-junction microchannels. For miscible mixing experiments, i.e. propan-2-ol and water, water and sodium chloride solution, both microchannels show mixing index for each Reynolds number is directly proportional to the mixing time. At low Reynolds number, higher molecular diffusion takes place while at low flow rate, the residence time of fluid is high. The mixing performance is relatively good at high Reynolds number of 40 and 50 due to the significant convection which is caused by the effect of stretching and thinning of liquid lamellae. For immiscible propan-2-ol and sodium chloride solution mixing, offset T-junction microchannel offers better mixing performance than T-junction microchannel at both low and high Reynolds number. The chaotic mixing happened at the intersection of the T-junction microchannel due to the direct interaction of two liquids entering the junction at high momentum.
doi_str_mv 10.1177/09544089211015476
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For immiscible propan-2-ol and sodium chloride solution mixing, offset T-junction microchannel offers better mixing performance than T-junction microchannel at both low and high Reynolds number. The chaotic mixing happened at the intersection of the T-junction microchannel due to the direct interaction of two liquids entering the junction at high momentum.</description><identifier>ISSN: 0954-4089</identifier><identifier>EISSN: 2041-3009</identifier><identifier>DOI: 10.1177/09544089211015476</identifier><language>eng</language><publisher>London, England: SAGE Publications</publisher><subject>Chloride ; Diffusion rate ; Flow velocity ; Fluid flow ; High Reynolds number ; Liquids ; Low flow ; Microchannels ; Microfluidics ; Micromixing ; Miscibility ; Molecular diffusion ; Physics ; Reynolds number ; Sodium ; Sodium chloride</subject><ispartof>Proceedings of the Institution of Mechanical Engineers. 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subjects Chloride
Diffusion rate
Flow velocity
Fluid flow
High Reynolds number
Liquids
Low flow
Microchannels
Microfluidics
Micromixing
Miscibility
Molecular diffusion
Physics
Reynolds number
Sodium
Sodium chloride
title Characterization of dissimilar liquids mixing in T-junction and offset T-junction microchannels
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