Interface study of the fluids in passive micromixers by altering the geometry of inlets

Rahbarshahlan, S.; Bakhshayesh, A. Ghaffarzadeh; Khosroshahi, Alireza Rostamzadeh; Aligholami, M.

doi:10.1007/s00542-020-05067-2

Cited by 17 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, microfluidic chips are composed of several branch channels used for injecting two or more fluids, and the angles between the channels are also varied. Micromixers, one of the applications of microfluidic chips, have several branch channels, and the lengths and angles between channels are very important for the efficiency of the fluid mixing [ 20 , 21 , 22 ]. When machining branch channels using microtools, the sizes of the cracks vary depending on the tool feed direction.…”

Section: Resultsmentioning

confidence: 99%

Microfluidic Chip Fabrication of Fused Silica Using Microgrinding

Lee

Sim

et al. 2022

Micromachines

View full text Add to dashboard Cite

Although glass is in high demand as a material for microfluidic chips, it is still difficult to fabricate microstructures on glass. In this paper, polycrystalline diamond tools were fabricated through electrical discharge machining, and the microgrinding process for fused silica using the tools was studied. In order to improve the productivity, the machining effects of the high feed rate and depth of cut on the surface roughness of the channel bottoms and edge chipping were studied. A toolpath for the microchannels of a microfluidic chip was also studied and a microfluidic chip array was fabricated using this method.

show abstract

Section: Resultsmentioning

confidence: 99%

Microfluidic Chip Fabrication of Fused Silica Using Microgrinding

Lee

Sim

et al. 2022

Micromachines

View full text Add to dashboard Cite

show abstract

“…The finite element approach was applied for resolving the governing equations. The fundamental equations that governed fluid flow inside the microchannel are the continuity equation and the Navier–Stokes equations, which are presented as follows: ∇ . V = 0 ρ ( V . ∇ ) V = prefix− ∇ p + μ ∇ 2 V …”

Section: Introductionmentioning

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.

View full text Add to dashboard Cite

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.

show abstract

“…In the sub-area of micromixing, however, there have been some attempts to incorporate the cost of mixing conjoined with the traditional, statistical measure of mixing quality. For example, Chung and Shih [8] divided the standard deviation based mixing index by the pressure drop; others follow this idea and used that same ratio for other micromixer applications as well [9,10]. Nevertheless, the aforementioned techniques were applicable only to micromixing and relatively low Reynolds (Re) numbers.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the performance of static mixers using the M -number: the case of the Koflo® mixer

2023

View full text Add to dashboard Cite

Static mixers (SMs) are widely used in applications that involve chemical reactions, heat transfer, blending of fluids, or some combination of these. Accurately evaluating the performance of SMs is critical for the appropriate selection of these devices. Traditional approaches involve parameters that separately evaluate the mixing level and the energy spent in mixing (i.e., pressure drop) but do not account for both simultaneously. The M-number has been recently proposed as a means to simultaneously evaluate the quality of mixing as well as the pressure drop across the static mixer (SM). This work demonstrates an implementation of the M-number by evaluating the performance of a KOFLO static mixer (KSM) for mixing water vapor and air via Computational Fluid Dynamics (CFD), for Schmidt number of approximately unity. Pipe and mixer sizes as well as inlet profile distribution were varied. A single-element KSM was used based on the impetus of our study: Selective Catalytic Reactor (SCR) applications, which requires minimization of the pressure drop. The results are shown to be reasonably comparable with respect to previous works, containing experimental data.

show abstract

Interface study of the fluids in passive micromixers by altering the geometry of inlets

Cited by 17 publications

References 36 publications

Microfluidic Chip Fabrication of Fused Silica Using Microgrinding

Microfluidic Chip Fabrication of Fused Silica Using Microgrinding

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

Evaluating the performance of static mixers using the M -number: the case of the Koflo® mixer

Contact Info

Product

Resources

About