Top: Photographs of the initial moments of a collision between two clusters of solid CO2 particles. A jamming front moves across the clusters after the collision. Bottom: Snapshots of a simulation of a collision between two 5000-particle elliptical clusters, showing a similar jamming front. Color indicates velocity; time increases left to right. Selected for an Editors' Suggestion.
From the article:
Energy Loss at Propagating Jamming Fronts in Granular Gas ClustersJustin C. Burton, Peter Y. Lu, and Sidney R. Nagel
Phys. Rev. Lett. 111, 188001 (2013)
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