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Jamming and Fluctuations in Granular Drag

I. Albert·P. Tegzes·B. Kahng·R. Albert·J. G. Sample·M. Pfeifer·A. -L. Barabasi·T. Vicsek·P. Schiffer
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Abstract

We investigate the dynamic evolution of jamming in granular media through fluctuations in the granular drag force. The successive collapse and formation of jammed states give a stick-slip nature to the fluctuations which is independent of the contact surface between the grains and the dragged object -- thus implying that the stress-induced collapse is nucleated in the bulk of the granular sample. We also find that while the fluctuations are periodic at small depths, they become "stepped" at large depths, a transition which we interpret as a consequence of the long-range nature of the force chains.

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I. Albert, P. Tegzes, B. Kahng, R. Albert, J. G. Sample, M. Pfeifer, A. -L. Barabasi, T. Vicsek, P. Schiffer. 1999-12-17. Jamming and Fluctuations in Granular Drag. https://doi.org/10.1103/physrevlett.84.5122

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