Issue
EPL
Volume 82, Number 3, May 2008
Article Number 34001
Number of page(s) 6
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/82/34001
Published online 23 April 2008
EPL, 82 (2008) 34001
DOI: 10.1209/0295-5075/82/34001

Flow of a particle along a rotating wall

A. Le Quiniou and F. Rioual

Cemagref, UR TSCF Technologies et Systèmes d'Information pour les agrosystèmes, Domaine des Palaquins Varennes-sur-Allier, F-03150, France, EU

francois.rioual@cemagref.fr

received 16 November 2007; accepted in final form 13 March 2008; published May 2008
published online 23 April 2008

Abstract
We study numerically and theoretically the flow of a particle along a rotating wall considering a viscoelastic interaction law. A typical trajectory of the particle along the wall consists in a first phase of successive jumps followed by a second phase of permanent contacts along the wall. We show in particular that there exists a critical friction coefficient between the particle and the wall for which the particle can roll without any sliding in the second phase. This critical friction coefficient appears to depend only on the normal coefficient of restitution of the particle. We examine also the influence of the rebounds in the flow of the particle. We give a physical interpretation of these effects.

PACS
45.50.-j - Dynamics and kinematics of a particle and a system of particles.
45.70.Mg - Granular flow: mixing, segregation and stratification.
87.15.A- - Theory, modeling, and computer simulation.

© EPLA 2008