Particle dispersion in sheared suspensions: Crucial role of solid-solid contacts

We performed high resolution measurements of the dynamics of non-Brownian and neutrally buoyant particles subjected to a periodic shear flow under low Reynolds number conditions. By changing the particle roughness and showing that it significantly affects the particle motion, we provide direct evide...

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Bibliographic Details
Published in:Physics of fluids (1994) 2015-05, Vol.27 (5)
Main Authors: Pham, Phong, Metzger, Bloen, Butler, Jason E.
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Condensed Matter
Contact force
Fluid dynamics
Fluid flow
Frictionless contact
Lubrication
Particle motion
Particle trajectories
Physics
Reynolds number
Shear flow
Soft Condensed Matter
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Summary:We performed high resolution measurements of the dynamics of non-Brownian and neutrally buoyant particles subjected to a periodic shear flow under low Reynolds number conditions. By changing the particle roughness and showing that it significantly affects the particle motion, we provide direct evidence that particle solid-solid contacts occur in viscous suspensions and strongly influence the particle dynamics. An accurate prediction of the particle trajectories is obtained with a minimal model that solely includes normal lubrication interactions and a frictionless contact force.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.4919728