Characterizing the Rheology of Fluidized Granular Matter

Details Characterizing the Rheology of Fluidized Granular Matter Characterizing the Rheology of Fluidized Granular Matter

2011-07-02

arxiv.org/abs/1107.0357v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

In this study we characterize the rheology of fluidized granular matter subject to secondary forcing. Our approach consists of first fluidizing granular matter in a drum half filled with grains via simple rotation, and then superimposing oscillatory shear perpendicular to the downhill flow direction. The response of the system is mostly linear, with a phase lag between the grain motion and the oscillatory forcing. The rheology of the system can be well characterize by the GDR-Midi model if the system is forced with slow oscillations. The model breaks down when the forcing timescale becomes comparable to characteristic time for energy dissipation in the flow.

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