Acoustic sharp-edge-based micromixer: a numerical study

Kharaji, Zahra Ghorbani; Kalantar, Vali; Bayareh, Morteza

doi:10.1007/s11696-021-01994-0

Cited by 22 publications

(12 citation statements)

References 44 publications

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“…The acoustic streaming produced by sharp edges is already widely used in microfluidic applications; 58,59 Doinikov et al conducted simulations and experiments for apex angles in the range from 10° to 130°, finding that the streaming velocity is not only related to the scale of sharp edges but also decreases with the apex angle increase, 60 as was confirmed by related research. 61,62 A triangular microstructure is a standard sharp edge structure, which is expected to have the best performance in generating acoustic streaming. A rectangular microstructure can be divided into two small triangular microstructures and a half-circular microstructure can be seen as a triangle with large apex angles (approaching 180°); both of them are less powerful than the triangular microstructure in an acoustic streaming generation.…”

Section: Resultsmentioning

confidence: 99%

Polydimethylsiloxane microstructure-induced acoustic streaming for enhanced ultrasonic DNA fragmentation on a microfluidic chip

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Polydimethylsiloxane microstructure-induced acoustic streaming for enhanced ultrasonic DNA fragmentation on a microfluidic chip

et al. 2022

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“…They have employed passive and active techniques. Magnetic field [5,6,8,10], acoustic field [7,18], and electrophoresis [9,11,16,17] are three types of active methods that improve mixing efficiency. It can be found that molecular diffusion is dominant when Re is low and chaotic advection plays a major role when Re is high.…”

Section: Micromixingmentioning

confidence: 99%

Micromixing and microparticle separation: A review

2023

Proceeding Book of 1st International Conference on Recent and Innovative Results in Engineering and Technology Icriret 2023

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This review paper presents an overview of micromixing and the separation of microparticles using active and passive approaches. Various techniques are introduced and their main characteristics are compared. This paper reveals that hybrid and active methods can provide higher performance for microfluidic devices; however, passive approaches employ simpler structures. The type of microfluidic devices, their geometry, and the range of Reynolds number (Re) are compared for active and passive devices. Hybrid methods can be utilized to improve the mixing index of micromixers. It can be concluded that the separation of microparticles/cells is based on their size, deformability, density, inlet flow rate, strength of external forces, etc.

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“…[44][45][46] A common outcome of this work is that sharper edge tips result in higher streaming velocities and an increased spatial extent of the induced streaming, producing amplified acoustic force gradients by decreasing the angle of a sharp edge's apex. [47][48][49] Whilst a variety of microstructures have been used to generate amplified microstreaming effects via sharp-edge geometries, they have been constrained in terms of their versatility, primarily being limited to boundary-driven arrangements on channel sidewalls, generating vortical flow across a channel cross-section. The complexity of these structures is also limited, where sharpedge interfaces generally utilize oscillating 2-dimensional straight edges in etched/molded channels that generate streaming vortices that are orthogonal to the sharp edge.…”

Section: Introductionmentioning

confidence: 99%