%0 Journal Article
%T Energy Loss at Propagating Jamming Fronts in Granular Gas Clusters
%A Justin C. Burton
%A Peter Y. Lu
%A Sidney R. Nagel
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevLett.111.188001
%X We explore the initial moments of impact between two dense granular clusters in a two-dimensional geometry. The particles are composed of solid CO$_{2}$ and are levitated on a hot surface. Upon collision, the propagation of a dynamic "jamming front" produces a distinct regime for energy dissipation in a granular gas in which the translational kinetic energy decreases by over 90%. Experiments and associated simulations show that the initial loss of kinetic energy obeys a power law in time, $\Delta E=-Kt^{3/2}$, a form that can be predicted from kinetic arguments.
%U http://arxiv.org/abs/1306.2687v3