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High-speed trains: in microchannels?

Abstract

Kahkeshani et al. (J. Fluid Mech., vol. 786, 2016, R3) have studied particle ordering in suspension flow in a rectangular microchannel. Experiments and numerical simulations reveal that inertial focusing and hydrodynamic interactions result in long-lived ‘trains’ of regularly spaced particles. The preferred spacing is frustrated at sufficient particle concentration, an important feature for applications.

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Copyright
Corresponding author
Email address for correspondence: morris@ccny.cuny.edu
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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

S. L Anna , N. Bontoux  & H. A. Stone 2003 Formation of dispersions using ‘flow focusing’ microchannels. Appl. Phys. Lett. 82, 364366.

B. Chun  & A. J. C. Ladd 2006 Inertial migration of neutrally buoyant particles in a square duct: an investigation of multiple equilibrium positions. Phys. Fluids 18, 031704.

K. J. Humphry , P. M. Kulkarni , D. A. Weitz , J. F. Morris  & H. A. Stone 2010 Axial and lateral ordering in finite Reynolds number channel flows. Phys. Fluids 22, 081703.

S. C. Hur , N. K. Henderson-MacLenna , E. R. B. McCabe  & D. Di Carlo 2011 Deformability-based cell classification and enrichment using inertial microfluidics. Lab on a Chip 11, 911920.

A. J. C. Ladd 1994 Numerical simulations of particulate suspensions via a discretized Boltzmann equation. Part 1. Theoretical foundation. J. Fluid Mech. 271, 285309.

J.-P. Matas , V. Glezer , J. F. Morris  & É. Guazzelli 2004 Trains of particles in finite-Reynolds number pipe flow. Phys. Fluids 16, 41924195.

J. Zhou , P. V. Giridar , S. Kasper  & I. Papautsky 2014 Modulation of aspect ratio for complete separation in an inertial microfluidic channel. Lab on a Chip 13, 19191929.

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Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
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