An active microfluidic mixer utilizing a hybrid gradient magnetic field

Cao, Quanliang; Han, Xiaotao; Li, Liang

doi:10.3233/jae-140057

Cited by 40 publications

(19 citation statements)

References 42 publications

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“…In the case that no magnetic field was applied, results were completely different, since no mixing between the two streams was observed [34,35]. The differences were caused by the shape of the simulated geometries (i.e., T shaped in [34], straight duct in [35], and Y shaped in the present study). Additionally, in our study, the angle between the two streams did not affect the mixing process-at least for the simulated angles that were used here.…”

Section: Discussioncontrasting

confidence: 57%

“…The results of the present study are very promising compared to other studies using external magnetic fields for the mixing procedure [34,35]. In the case that no magnetic field was applied, results were completely different, since no mixing between the two streams was observed [34,35]. The differences were caused by the shape of the simulated geometries (i.e., T shaped in [34], straight duct in [35], and Y shaped in the present study).…”

Section: Discussionsupporting

confidence: 38%

Section: Discussionmentioning

confidence: 41%

“…As it can be understood, efficient mixing of the magnetic nanoparticles with the polluted water is a crucial issue. The vast majority of researchers conventionally employ an external magnetic field to achieve efficient mixing inside micromixer devices [32][33][34][35], necessitating the usage of electromagnets in the mixer device too (electromagnets are, of course, necessary at the exit part of the cleaning device for separation of the nanoparticles from the clean water). Consequently, in the conventional approach, a part of the micromixer device should be the electromagnet as well as the supporting systems of it.…”

Section: Introductionmentioning

confidence: 99%

“…This approach had the advantage of avoiding the use of electromagnets in the micromixer. A series of numerical simulations was performed for the study of this inlet effect on the particle distribution in the duct and the mixing between the two streams using computational fluid dynamics-an approach widely used for such simulations [29,[32][33][34].…”

Section: Introductionmentioning

confidence: 99%

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Micromixing Efficiency of Particles in Heavy Metal Removal Processes under Various Inlet Conditions

Karvelas

Liosis

Benos

et al. 2019

Water

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Water quality problems are a persistent global issue since population growth has continually stressed hydrological resources. Heavy metals released into the environment from plating plants, mining, and alloy manufacturing pose a significant threat to the public health. A possible solution for water purification from heavy metals is to capture them by using nanoparticles in micromixers. In this method, conventionally heavy metal capture is achieved by effectively mixing two streams, a particle solution and the contaminated water, under the action of external magnetic fields. In the present study, we investigated the effective mixing of iron oxide nanoparticles and water without the use of external magnetic fields. For this reason, the mixing of particles and the contaminated water was studied for various inlet velocity ratios and inflow angles of the two streams using computational fluid dynamics techniques. The Navier-Stokes equations were solved for the water flow, the discrete motion of particles was evaluated by a Lagrangian method, while the flow of substances of the contaminated water was studied by a scalar transport equation. Results showed that as the velocity ratio between the inlet streams increased, the mixing of particles with the contaminated water was increased. Therefore, nanoparticles were more uniformly distributed in the duct and efficiently absorbed the substances of the contaminated water. On the other hand, the angle between two streams was found to play an insignificant role in the mixing process. Consequently, the results from this study could be used in the design of more compact and cost efficient micromixer devices.

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Section: Discussioncontrasting

confidence: 57%

Section: Discussionsupporting

confidence: 38%

Section: Discussionmentioning

confidence: 41%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Micromixing Efficiency of Particles in Heavy Metal Removal Processes under Various Inlet Conditions

Karvelas

Liosis

Benos

et al. 2019

Water

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Fundamental Concepts and Physics in Microfluidics

Song

Zhao

Tian

et al. 2018

Microfluidics: Fundamental, Devices and Applications

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T‐Joint Micromixer Coupled with Deforming Diaphragm

Madapati

Arumuru

2022

Chem Eng & Technol

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A novel active micromixer design involving an oscillating diaphragm is proposed. A simulation study is performed to determine the effect of diaphragm length, amplitude, and frequency of the oscillating diaphragm on the mixing index. The geometry is a simple T‐joint with an elongated channel for the outlet with a diaphragm on the outlet channel wall. The fluids at the inlets are similar in fluid properties with the same flow rate and diffusion constant. The mixing index saturates with increasing frequency and amplitude of oscillation for a given diaphragm length. The diaphragm's effectiveness was calculated based on the pressure difference between the diaphragm inlet and outlet zone. The effectiveness declined with an increase in the frequency of the diaphragm oscillation. An analytical expression is derived to find the effect of the frequency and amplitude of the diaphragm oscillation on the mixing index. This simple novel design may find wide applications in various industrial fields.

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An active microfluidic mixer utilizing a hybrid gradient magnetic field

Cited by 40 publications

References 42 publications

Micromixing Efficiency of Particles in Heavy Metal Removal Processes under Various Inlet Conditions

Micromixing Efficiency of Particles in Heavy Metal Removal Processes under Various Inlet Conditions

Fundamental Concepts and Physics in Microfluidics

T‐Joint Micromixer Coupled with Deforming Diaphragm

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