title: Impact of a projectile on a granular medium described by a collision model.
abstract: We propose a model for the propagation of energy due to the impact of a granular projectile on a dense granular medium. Energy is transferred from grain to grain during binary collision events. The transport of energy may then be viewed as a random walk with a split of energy during successive collisions. There is a qualitative and quantitative agreement between this simple description and experimental results.
authors.affiliation: Groupe Matière Condensée et Matériaux, UMR CNRS 6626, Université de Rennes 1, Campus de Beaulieu Bâtiment 11A, 35042 Rennes Cedex, France. jerome.crassous@univ-rennes1.fr
authors.forename: Jérôme
authors.initials: J
authors.lastname: Crassous
authors.forename: Djaoued
authors.initials: D
authors.lastname: Beladjine
authors.forename: Alexandre
authors.initials: A
authors.lastname: Valance