Modeling and simulation of a split and recombination-based passive micromixer with vortex-generating mixing units

Nishu, Israt Zahan; Samad, Mst. Fateha

doi:10.1016/j.heliyon.2023.e14745

Cited by 6 publications

(3 citation statements)

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“…This strategy is based on a statistical technique that calculates a mixing index to assess the degree of mixing along the different cross sections of the mixing path. 40,41 In order to study the mixing efficiency in the three suggested micromixers, the mixing index was chosen as an important parameter. Figure 9 shows the dynamic evolution of the mixing index along the length of the micromixers, highlighting its dependence on varying Reynolds numbers.…”

Section: Resultsmentioning

confidence: 99%

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Numerical Investigation on a Chaotic Passive Micromixer Based on Square Chambers Connected with Different Channel Shapes for Enhancing the Mixing Process

bennour,

Kaid,

Mouissi

2024

Ind. Eng. Chem. Res.

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In this work, passive micromixers that consist of square mixing chambers symmetrically placed along the length of the mixer are investigated for the mixing of miscible fluids. The governing equation of Navier−Stokes and the convection−diffusion equation were resolved using the finite element approach, which is implemented in the COMSOL 6.1 software to simulate and evaluate the effectiveness of the mixers. Different design configurations of micromixers are evaluated using three key performance parameters, including the mixing index, pressure drop, and mixing energy cost, to analyze three distinct channel types of curved, square-wave, and zigzag across a wide range of Reynolds numbers, between 0.1 and 45. The study also investigated the behavior of diffusion and chaotic advection, the results showed as Reynolds numbers increase, the mixing index exhibits an initial decrease followed by an increase. Remarkably, all micromixers reach a great mixing performance of 99% at a low Reynolds number of 45. This complete mixing is accompanied by variations in pressure drop values, where the SCC mixer has a smaller pressure drop compared to the SCS-W and SCZ mixers, with decreases of 74.26 and 30.70%, respectively. Comparing the suggested mixer to previously published micromixers, it also has a more compact design and an easier manufacturing procedure.

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Section: Resultsmentioning

confidence: 99%

“…So, it makes more sense to use a quantitative approach to quickly comprehend it better. This strategy is based on a statistical technique that calculates a mixing index to assess the degree of mixing along the different cross sections of the mixing path. , …”

Section: Resultsmentioning

confidence: 99%

Numerical Investigation on a Chaotic Passive Micromixer Based on Square Chambers Connected with Different Channel Shapes for Enhancing the Mixing Process

bennour,

Kaid,

Mouissi

2024

Ind. Eng. Chem. Res.

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“…The fluid was considered incompressible and Newtonian, with a density of 10 3 kg/m 3 , a dynamic viscosity of 10 –3 Pa·s, and a diffusion coefficient of 10 –9 m 2 /s, as common reference values in micromixer studies. − Also, the steady-state condition was selected to evaluate the numerical simulations. Equal uniform velocity was set to both of the inlets, along with applying the molar concentrations (mol/m 3 ) of 0 and 1 to inlet 1 and inlet 2, respectively.…”

Section: Methodsmentioning

confidence: 99%

A Novel Strategy for Square-Wave Micromixers: A Survey of RBC Lysis for Further Biological Analysis

Hazeri,

Abouei Mehrizi,

Mohseni

et al. 2023

Ind. Eng. Chem. Res.

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Most biorelated applications require homogeneous mixing, necessitating innovative approaches to design high-efficiency micromixers. In this study, for the first time, we have changed the straight structure of a base square-wave micromixer to include regularpolygon-designed mixing units coupled with convergent−divergent channels. The aim was to show that the designed mixing units can enhance mixing at low Reynolds (Re) numbers. Importantly, within the optimization process, the mixing volume and mixing length of the micromixers were kept intact. In this respect, the required numerical evaluations were conducted to obtain the optimized micromixers at Re = 0.1 and 2, where the mixing index for the base micromixer increased from 0.9187 to 0.9944 and from 0.1600 to 0.4043, respectively. Finally, to prove that the optimized micromixers possess a better practical performance than the base micromixer, RBC lysis, as a vital preprocessing step of many biological experiments, was compared at Re = 0.1 and 2 for the base and optimized micromixers.

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Numerical Investigation of Miscible Fluids Interaction in T Micromixer with and Without Obstacles

Mahanta,

Patel,

Ghose

et al. 2024

Lecture Notes in Mechanical Engineering

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Modeling and simulation of a split and recombination-based passive micromixer with vortex-generating mixing units

Cited by 6 publications

References 30 publications

Numerical Investigation on a Chaotic Passive Micromixer Based on Square Chambers Connected with Different Channel Shapes for Enhancing the Mixing Process

Numerical Investigation on a Chaotic Passive Micromixer Based on Square Chambers Connected with Different Channel Shapes for Enhancing the Mixing Process

A Novel Strategy for Square-Wave Micromixers: A Survey of RBC Lysis for Further Biological Analysis

Numerical Investigation of Miscible Fluids Interaction in T Micromixer with and Without Obstacles

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