Layering instability in a confined suspension flow

Details Layering instability in a confined suspension flow Layering instability in a confined suspension flow

2011-11-19

arxiv.org/abs/1111.4538v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 6 figures

Scientific paper

We have shown [J.\ Fluid Mech.\ {\bf 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 formation of a layered microstructure in such flows in a wide range of densities.

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