Dynamics of prolate spheroidal elastic particles in confined shear flow

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
M M VilloneP L Maffettone

Abstract

We investigate through numerical simulations the dynamics of a neo-Hookean elastic prolate spheroid suspended in a Newtonian fluid under shear flow. Both initial orientations of the particle within and outside the shear plane and both unbounded and confined flow geometries are considered. In unbounded flow, when the particle starts on the shear plane, two stable regimes of motion are found, i.e., trembling, where the particle shape periodically elongates and compresses in the shear plane and the angle between its major semiaxis and the flow direction oscillates around a positive mean value, and tumbling, where the particle shape periodically changes and its major axis performs complete revolutions around the vorticity axis. When the particle is initially oriented out of the shear plane, more complex dynamics arise. Geometric confinement of the particle between the moving walls also influences its deformation and regime of motion. In addition, when the particle is initially located in an asymmetric position with respect to the moving walls, particle lateral migration is detected. The effects on the particle dynamics of the geometric and physical parameters that rule the system are investigated.

References

Apr 22, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·R FinkenU Seifert
Mar 10, 2012·Physical Review Letters·Tong GaoPedro Ponte Castañeda
Mar 19, 2014·Advances in Colloid and Interface Science·David AbreuUdo Seifert
May 16, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·G D'AvinoP L Maffettone

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Citations

Jun 14, 2016·Journal of the Mechanical Behavior of Biomedical Materials·Dhananjay Radhakrishnan Subramaniam, David J Gee
Nov 24, 2017·Lab on a Chip·Massimiliano M VillonePietro Ferraro
Feb 19, 2020·Lab on a Chip·Sajad Razavi BazazMajid Ebrahimi Warkiani
Apr 7, 2017·Light, Science & Applications·Francesco MerolaPietro Ferraro
Nov 30, 2019·Physical Review Fluids·Xiao ZhangMichael D Graham
Nov 22, 2020·Biomechanics and Modeling in Mechanobiology·Sebastian J MüllerStephan Gekle
Feb 1, 2020·Physical Review Fluids·Xiao Zhang, Michael D Graham

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