Mixing performance of unbalanced split and recombine micomixers with circular and rhombic sub-channels

Ansari, Mubashshir Ahmad; Kim, Kwang‐Yong

doi:10.1016/j.cej.2010.05.068

Cited by 80 publications

(63 citation statements)

References 33 publications

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“…Cieslicki and Piechna elaborated the mechanism of mixing process in a manifold which mimics the geometrical properties of vascular systems [15]. Ansari and Kim evaluated mixing performance for planar split and recombine micromixers with asymmetric sub-channels [16]. Mixing index was evaluated to measure the degree of mixing in the micromixer.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on micromixers with serpentine microchannels

Chen

Zeng

et al. 2016

International Journal of Heat and Mass Transfer

217

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on micromixers with serpentine microchannels

Chen

Zeng

et al. 2016

International Journal of Heat and Mass Transfer

217

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“…The performances of circular and rhombic SAR micromixers were compared numerically by Ansari and Kim [24]. A numerical and experimental study on an SAR-based rhombic micromixer was studied by Chung and Shih [25,26].…”

Section: Open Accessmentioning

confidence: 99%

Mixing Analysis of Passive Micromixer with Unbalanced Three-Split Rhombic Sub-Channels

Hossain

Kim

2014

Micromachines

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Abstract:A micromixer with unbalanced three-split rhombic sub-channels was proposed, and analyses of the mixing and flow characteristics of this micromixer were performed in this work. Three-dimensional Navier-Stokes equations in combination with an advection-diffusion model with two working fluids (water and ethanol) were solved for the analysis. The mixing index and pressure drop were evaluated and compared to those of a two-split micromixer for a range of Reynolds numbers from 0.1-120. The results indicate that the proposed three-split micromixer is efficient in mixing for a range of Reynolds numbers from 30-80. A parametric study was performed to determine the effects of the rhombic angle and sub-channel width ratio on mixing and pressure drop. Except at the lowest Reynolds number, a rhombic angle of 90° gave the best mixing performance. The three-split micromixer with minimum minor sub-channel widths provided the best mixing performance.

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“…In the last decade, for better mixing efficiency, many researchers have made great effort to develop various types of passive micromixers composed of 2-D curved channel with radial baffles, 23 2-D cylindrical grooves adjoining to the main straight channel 24 and 2-D structures based on the concept of the splitting and recombination. [25][26][27][28] These micromixers did exhibit high performance at high flow rates, but at a low level the channel geometries cannot result in obvious vortices or chaotic advection and the contact surface between the streams are usually vertical without rotation and expansion, so these micromixers are not effective at lower Reynolds number unless these micromixers have a longer mixing length.…”

Section: Introductionmentioning

confidence: 99%

An effective splitting-and-recombination micromixer with self-rotated contact surface for wide Reynolds number range applications

2013

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It is difficult to mix two liquids on a microfluidic chip because the small dimensions and velocities effectively prevent the turbulence. This paper describes two 2-layer PDMS passive micromixers based on the concept of splitting and recombining the flow that exploits a self-rotated contact surface to increase the concentration gradients to obtain fast and efficient mixing. The designed micromixers were simulated and the mixing performance was assessed. The mixers have shown excellent mixing efficiency over a wide range of Reynolds number. The mixers were reasonably fabricated by multilayer soft lithography, and the experimental measurements were performed to qualify the mixing performance of the realized mixer. The results show that the mixing efficiency for one realized mixer is from 91.8% to 87.7% when the Reynolds number increases from 0.3 to 60, while the corresponding value for another mixer is from 89.4% to 72.9%. It is rather interesting that the main mechanism for the rapid mixing is from diffusion to chaotic advection when the flow rate increases, but the mixing efficiency has not obvious decline. The smart geometry of the mixers with total length of 10.25 mm makes it possible to be integrated with many microfluidic devices for various applications in l-TAS and Lab-on-a-chip systems. V C 2013 AIP Publishing LLC.

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Mixing performance of unbalanced split and recombine micomixers with circular and rhombic sub-channels

Cited by 80 publications

References 33 publications

Numerical and experimental investigation on micromixers with serpentine microchannels

Numerical and experimental investigation on micromixers with serpentine microchannels

Mixing Analysis of Passive Micromixer with Unbalanced Three-Split Rhombic Sub-Channels

An effective splitting-and-recombination micromixer with self-rotated contact surface for wide Reynolds number range applications

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