Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.068301
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Funding
- NSF [CBET 1059745]
- Ministerio de Innovacion y Ciencia [RYC-2008-03650]
- Junta de Andalucia [P08-TEP-03997]
- Polish Ministry of Science and Higher Education [N N501 156538]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1059745] Funding Source: National Science Foundation
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We show [J. Fluid Mech. 592, 447 (2007)] that swapping (reversing) trajectories in confined suspension flows prevent collisions between particles approaching each other in adjacent streamlines. Here we demonstrate that by inducing layering this hydrodynamic mechanism changes the microstructure of suspensions in a confined Couette flow. Layers occur either in the near-wall regions or span the whole channel width, depending on the strength of the swapping-trajectory effect. While our theory focuses on dilute suspensions, we postulate that this new hydrodynamic mechanism controls the formation of a layered microstructure in a wide range of densities.
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