Sommaire:

For inertial granular flow near jamming, nearly all of the energy dissipation is due to frictional sliding, rather than inelastic collisions. However, collisions nevertheless send acoustic waves through the system, acting as a source of mechanical noise. Despite its tiny amplitude, we show that this noise controls the scaling of kinetic quantities. A corollary is that, for these quantities, there is no rigid limit. We argue that mechanical noise may be crucial to understand S-shape flow curves and flow instability in slow, inertial granular flow.

Potential CNRS candidate

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