Asmolov ES, Nizkaya TV, Harting J, Vinogradova OI (2021)
Publication Type: Journal article
Publication year: 2021
Book Volume: 33
Article Number: 092008
Journal Issue: 9
DOI: 10.1063/5.0063566
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 unstable equilibrium.
APA:
Asmolov, E.S., Nizkaya, T.V., Harting, J., & Vinogradova, O.I. (2021). Instability of particle inertial migration in shear flow. Physics of Fluids, 33(9). https://doi.org/10.1063/5.0063566
MLA:
Asmolov, Evgeny S., et al. "Instability of particle inertial migration in shear flow." Physics of Fluids 33.9 (2021).
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