Dynamic simulation of arbitrarily shaped particles in shear flow

Joung, C. G.

doi:10.1007/s00397-006-0110-6

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…This trend agreed well with the previous numerical analysis, reporting an increase in Jeffrey orbit period with increasing length of rodlike fibers in shear flow. 21 Moreover, the ratio between the time that the doublet spent at horizontal orientations, T s , and T p was found to be proportional to D max , suggesting that the cylinders with larger D max would reside longer at a horizontal orientation and recover that orientation more rapidly than the smaller particles. This longer residence time and rapid recovery of preferred orientation would particularly benefit applications, requiring accurate orientation control for encoded shape-or pattern-recognition.…”

Section: W=2mentioning

confidence: 90%

Inertial focusing of non-spherical microparticles

Hur

Choi

Kwon

et al. 2011

Applied Physics Letters

118

102

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We have investigated the focusing and dynamics of non-spherical polymeric particles in microfluidic flows at finite Reynolds number. The rotational diameter, D max , of a particle, regardless of its cross-sectional shape, was found to determine the final focused position, except for the case of asymmetric disks. Additionally, elongated particles with larger D max exhibited longer residence times in a horizontal orientation than those with smaller D max. These findings inform approaches to hydrodynamically control shaped and barcoded particles for multiplexed biochemical assays. V

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Section: W=2mentioning

confidence: 90%

Inertial focusing of non-spherical microparticles

Hur

Choi

Kwon

et al. 2011

Applied Physics Letters

118

102

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“…One of the classic works in this area was the investigation of the motion of ellipsoidal particles in unbounded shear flow in a Stokes flow regime by Jeffery 54 which led to the discovery of the so-called "Jeffery orbit" in which a particle rotates in a closed repeating cycle around any of an infinite set of axes that depend on its initial orientation. 55 Here we discuss how particle shape and fluid inertia combined can affect particle motion, focusing and separation dynamics in microchannel systems.…”

Section: C) Shaped Particles (With or Without Fluid Inertia)mentioning

confidence: 99%

Inertial microfluidic physics

2014

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Microfluidics has experienced massive growth in the past two decades, and especially with advances in rapid prototyping researchers have explored a multitude of channel structures, fluid and particle mixtures, and integration with electrical and optical systems towards solving problems in healthcare, biological and chemical analysis, materials synthesis, and other emerging areas that can benefit from the scale, automation, or the unique physics of these systems. Inertial microfluidics, which relies on the unconventional use of fluid inertia in microfluidic platforms, is one of the emerging fields that make use of unique physical phenomena that are accessible in microscale patterned channels. Channel shapes that focus, concentrate, order, separate, transfer, and mix particles and fluids have been demonstrated, however physical underpinnings guiding these channel designs have been limited and much of the development has been based on experimentally-derived intuition. Here we aim to provide a deeper understanding of mechanisms and underlying physics in these systems which can lead to more effective and reliable designs with less iteration. To place the inertial effects into context we also discuss related fluid-induced forces present in particulate flows including forces due to non-Newtonian fluids, particle asymmetry, and particle deformability. We then highlight the inverse situation and describe the effect of the suspended particles acting on the fluid in a channel flow. Finally, we discuss the importance of structured channels, i.e. channels with boundary conditions that vary in the streamwise direction, and their potential as a means to achieve unprecedented three-dimensional control over fluid and particles in microchannels. Ultimately, we hope that an improved fundamental and quantitative understanding of inertial fluid dynamic effects can lead to unprecedented capabilities to program fluid and particle flow towards automation of biomedicine, materials synthesis, and chemical process control.

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“…This deviation is due to the non-spheroidal form and can be taken into consideration by replacing the aspect ratio λ by the equivalent ellipsoidal axis ratio λ e [ 20 , 29 , 31 , 50 , 59 ]. For rod-like particles, it was found experimentally and numerically that λ e / λ ≈ 0.7 [ 31 , 35 ].…”

Section: Rotational Behavior Of a Non-spherical Particle In A Sheamentioning

confidence: 99%

Transport of Non-Spherical Particles in Square Microchannel Flows: A Review

2021

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Understanding the behavior of a single particle flowing in a microchannel is a necessary step in designing and optimizing efficient microfluidic devices for the separation, concentration, counting, detecting, sorting, or mixing of particles in suspension. Although the inertial migration of spherical particles has been deeply investigated in the last two decades, most of the targeted applications involve shaped particles whose behavior in microflows is still far from being completely understood. While traveling in a channel, a particle both rotates and translates: it translates in the streamwise direction driven by the fluid flow but also in the cross-section perpendicular to the streamwise direction due to inertial effects. In addition, particles’ rotation and translation motions are coupled. Most of the existing works investigating the transport of particles in microchannels decouple their rotational and lateral migration behaviors: particle rotation is mainly studied in simple shear flows, whereas lateral migration is neglected, and studies on lateral migration mostly focus on spherical particles whose rotational behavior is simple. The aim of this review is to provide a summary of the different works existing in the literature on the inertial migration and the rotational behavior of non-spherical particles with a focus and discussion on the remaining scientific challenges in this field.

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Dynamic simulation of arbitrarily shaped particles in shear flow

Cited by 8 publications

References 21 publications

Inertial focusing of non-spherical microparticles

Inertial focusing of non-spherical microparticles

Inertial microfluidic physics

Transport of Non-Spherical Particles in Square Microchannel Flows: A Review

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