Numerical Analysis of Mixing Performance in Microchannel with Different Ratio of Outlet to Inlet Width

Mondal, Bappa; Pati, Sukumar; Patowari, Promod Kumar

doi:10.1007/978-3-030-16962-6_26

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…This is because higher molecular diffusion takes place while the flow rate is low due to its higher residence time. 31 Figure 4(a) shows that propan-2-ol and water do not flow side by side in the low Reynolds number regime as there is a large amount of mass transfer perpendicular to the main flow. 22 At Re = 5, it can be seen that the mixing process is slower to take effect at the early stage but as the diffusion time increases, the mixing quality of propan-2-ol and water also increases.…”

Section: Resultsmentioning

confidence: 99%

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

Ringkai

Tamrin

Sheikh

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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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.

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Section: Resultsmentioning

confidence: 99%

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

Ringkai

Tamrin

Sheikh

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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show abstract

“…The mixing mechanism in passive micromixers can be flow separation, split and recombination, chaotic advection, vortex generation, etc. [16][17][18] The fluid mixing in passive micromixers mostly depends on the channel geometry. Several researchers have designed novel geometries focusing on increasing the interfacial area over which diffusion occurs for enhancing fluid mixing.…”

Section: Introductionmentioning

confidence: 99%

“…The mixing mechanism in passive micromixers can be flow separation, split and recombination, chaotic advection, vortex generation, etc. 16–18…”

Section: Introductionmentioning

confidence: 99%

Mixing characteristics and pressure drop analysis in a spiral micromixer

Tripathi

Patowari

Pati

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this work, numerical computations are performed to analyze the mixing characteristics and pressure drop in a spiral micromixer. The effects of variation in width and depth of the micromixer are investigated for Reynolds number ( Re) in the range of 0.1 ≤ Re≤100. Results are enumerated in terms of mass contours, streamlines, mixing index and pressure drop. It is observed that the designed spiral micromixer provides a better mixing for both low and high Re values, and moreover, the mixing index remains almost the same with the variation of the depth and width of the mixer for Re > 50. The mixing index first decreases with Re, reaches a minimum value, and thereafter again increases with a further increase in Re in the range of 0.1 ≤ Re≤50. For intermediate Reynolds number, a high mixing index is observed in micromixer having higher depth and lower width. Although the driving pressure force increases with the increase in Reynolds number, it decreases with the increase in width and depth of the micromixer.

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Numerical Investigations of Mixing Performance in Split and Recombine Micromixer

Tripathi

Patowari

Pati

2022

Recent Advances in Manufacturing Modelling and Optimization

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Numerical Analysis of Mixing Performance in Microchannel with Different Ratio of Outlet to Inlet Width

Cited by 9 publications

References 19 publications

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

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

Mixing characteristics and pressure drop analysis in a spiral micromixer

Numerical Investigations of Mixing Performance in Split and Recombine Micromixer

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