Mechanical noise governs kinetics in frictional granular flow
Orateur : Eric DeGiuli
Post-Doc, Laboratoire de Physique des Systèmes Complexes, EPFL, Lausanne, Suisse.
Résumé : 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.
Date et lieu : Mercredi 13 Juillet, à 11h00 en salle 250 à l’IUSTI