Intermittent flow during the discharge of a two- dimensional vibrated silo: Connections with pedestrian dynamics

GAGO, PAULA A.; PERALTA, J. P.; PUGNALONI, LUIS A.; PARISI DANIEL R.

Cordoba

Workshop; XIII Latin American Workshop on Nonlinear Phenomena; 2013

We present results on the distribution of interruption times during the discharge of a two-dimensional silo. The experimental setup allows for a controlled effective acceleration of gravity through an incline of variable angle and controlled vibration intensity via a shaker. The bursts of grains that flow during a discharge for small outlets are registered with a microphone. We show that the dead times between two bursts follow a long-tail distribution as observed in similar studies. The control of the effective gravity allows us to investigate the effect that internal pressure has on the jamming-unjamming events. We compare this experimental results with simulations of panic scape of pedestrian with variable desired velocities and show that the dynamics of the two systems are remarkably similar with the effective gravity in the granular system playing the role of the desired velocity for pedestrians.