From Frictional to Viscous Behavior: Three Dimensional Imaging and Rheology of Gravitational Suspensions

Details From Frictional to Viscous Behavior: Three Dimensional Imaging and Rheology of Gravitational Suspensions From Frictional to Viscous Behavior: Three Dimensional Imaging and Rheology of Gravitational Suspensions

2010-04-07

arxiv.org/abs/1004.1121v2

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures, accepted for Phys. Rev. E. (R)

Scientific paper

We probe the three dimensional flow structure and rheology of gravitational (non-density matched) suspensions for a range of driving rates in a split-bottom geometry. We establish that for sufficiently slow flows, the suspension flows as if it were a dry granular medium, and confirm recent theoretical modeling on the rheology of split-bottom flows. For faster driving, the flow behavior is shown to be consistent with the rheological behavior predicted by the recently developed "inertial number approaches for suspension flows.

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