Intruder mobility in a vibrated granular packing

Abstract

We study experimentally the dynamics of a dense intruder sinking under gravity inside a vibrated 2D granular packing. The surrounding flow patterns are characterized and the falling trajectories are interpreted in terms of an effectivive friction coefficient related to the intruder mean descent velocity (flow rules). At higher confining pressures i.e. close to jamming, a transition to intermittent dynamics is evidenced and displays anomalous "on-off" blockade statistics. A systematic analysis of the flow rules, obtained for different intruder sizes, either in the flowing regime or averaged over the flowing and blockade regimes, strongly suggest the existence of non-local properties for the vibrated packing rheology.}

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Cited by in corpus (9)

• Non-local rheology in dense granular flows -- Revisiting the concept of fluidity
• Local rheological measurements in the granular flow around an intruder
• Structural Responses of Quasi-2D Colloid Fluids to Excitations Elicited by Nonequilibrium Perturbations
• `Sinking' in a bed of grains activated by shearing
• Mobility in immersed granular materials upon cyclic loading
• Colloidal Lattice Shearing and Rupturing with a Driven Line of Particles
• Intruder Dynamics in a Frictional Granular Fluid: A Molecular Dynamics Study
• Disentangling intrinsic motion from neighbourhood effects in heterogeneous collective motion
• Sink versus tilt penetration into shaken dry granular matter: The role of the foundation