Statistical Physics

Jamming and fluctuations in granular drag

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.


More publications
Federico Battiston, Federico Musciotto, Dashun Wang, Albert-László Barabási, Michael Szell, and Roberta Sinatra

Nature Reviews Physics 1, 89-97 (2019)

A. Czirok, A.-L. Barabási, T. Vicsek

Physical Review Letters 82, 209–212 (1999)

R. Albert, M.A. Pfeifer, P. Schiffer, A.-L. Barabási

Physical Review Letters 82, 205–208 (1999)