Inertial migration of aerosol particles in three-dimensional microfluidic channels

Qian, Shizhi; Jiang, Maoqiang; Liu, Zhaohui

doi:10.1016/j.partic.2020.08.001

Cited by 16 publications

(9 citation statements)

References 65 publications

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“…Due to non-slip boundary condition at the boundary location of particle, clockwise rotation of the particle will induce fluid flowing upward at left and downward at right as shown in Figure 6c. Moreover, it can be seen from Figure 6b that the particle follows with fluid movement quite well [54].…”

Section: Fluid and Particle Interactionmentioning

confidence: 78%

“…The pressure at the upper left and down right side of the particle is higher than the upper right and down left corner, and hence generates a particle rotation in clockwise direction illustrated by the black arrow in Figure 6 a. Due to non-slip boundary condition at the boundary location of particle, clockwise rotation of the particle will induce fluid flowing upward at left and downward at right as shown in Figure 6 c. Moreover, it can be seen from Figure 6 b that the particle follows with fluid movement quite well [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

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Neutrally Buoyant Particle Migration in Poiseuille Flow Driven by Pulsatile Velocity

Huang

Zhu

2021

Micromachines

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A neutrally buoyant circular particle migration in two-dimensional (2D) Poiseuille channel flow driven by pulsatile velocity is numerical studied by using immersed boundary-lattice Boltzmann method (IB-LBM). The effects of Reynolds number (25≤Re≤200) and blockage ratio (0.15≤k≤0.40) on particle migration driven by pulsatile and non-pulsatile velocity are all numerically investigated for comparison. The results show that, different from non-pulsatile cases, the particle will migrate back to channel centerline with underdamped oscillation during the time period with zero-velocity in pulsatile cases. The maximum lateral travel distance of the particle in one cycle of periodic motion will increase with increasing Re, while k has little impact. The quasi frequency of such oscillation has almost no business with Re and k. Moreover, Re plays an essential role in the damping ratio. Pulsatile flow field is ubiquitous in aorta and other arteries. This article is conducive to understanding nanoparticle migration in those arteries.

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Section: Fluid and Particle Interactionmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Neutrally Buoyant Particle Migration in Poiseuille Flow Driven by Pulsatile Velocity

Huang

Zhu

2021

Micromachines

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“…Similar oscillatory trajectories have been found in simulations of neutrally buoyant 35 and heavy particles 33,34,36 migrating in pressuredriven flows, but no attempt has been made to connect these results to the equilibrium instability. In Fig.…”

Section: B Instability For Spherical Particles In Couette Flowmentioning

confidence: 59%

Instability of particle inertial migration in shear flow

et al. 2021

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“…Similar oscillatory trajectories have been found in simulations of neutrally buoyant 34 and heavy particles 32,33,35 migrating in pressure-driven flows, but no attempt has been made to connect these results to the equilibrium instability. In Fig.…”

Section: B Instability For Spherical Particles In Couette Flowmentioning

confidence: 59%

“…. The data inferred from earlier results for a pressure-driven flows are shown by filled triangles and diamonds (flat-parallel channels32,33 ), the star (a circular tube34 ), and the square (aerosol particles in a square channel35 ). The earlier data for steady-state trajectories32,33 are marked by the open triangle and diamond.…”

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confidence: 99%

Instability of particle inertial migration in shear flow

Asmolov,

Nizkaya,

Harting

et al. 2021

Preprint

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In a shear flow particles migrate to their equilibrium positions in the microchannel. Here we demonstrate theoretically that if particles are inertial, this equilibrium can become unstable due to the Saffman lift force. We derive an expression for the critical Stokes number that determines the onset of instable equilibrium. We also present results of lattice Boltzmann simulations for spherical particles and prolate spheroids to validate the analysis. Our work provides a simple explanation of several unusual phenomena observed in earlier experiments and computer simulations, but never interpreted before in terms of the instable equilibrium.

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Inertial migration of aerosol particles in three-dimensional microfluidic channels

Cited by 16 publications

References 65 publications

Neutrally Buoyant Particle Migration in Poiseuille Flow Driven by Pulsatile Velocity

Neutrally Buoyant Particle Migration in Poiseuille Flow Driven by Pulsatile Velocity

Instability of particle inertial migration in shear flow

Instability of particle inertial migration in shear flow

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