Impact dynamics of granular jets with noncircular cross sections.
Using high-speed photography, we investigate two distinct regimes of the impact dynamics of granular jets with noncircular cross sections. In the steady-state regime, we observe the formation of thin granular sheets with anisotropic shapes and show that the degree of anisotropy increases with the aspect ratio of the jet's cross section. Our results illustrate the liquidlike behavior of granular materials during impact and demonstrate that a collective hydrodynamic flow emerges from strongly interacting discrete particles. We discuss the analogy between our experiments and those from the Relativistic Heavy Ion Collider, where similar anisotropic ejecta from a quark-gluon plasma have been observed in heavy-ion impact.
Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, USA and The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA.
Xiang
X
Cheng
The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA and Laboratoire "Matière et Systèmes Complexes" (MSC), UMR 7057 CNRS, Université Paris 7 Diderot, 75205 Paris Cedex 13, France.
Leonardo
L
Gordillo
The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA.
Wendy W
WW
Zhang
The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA.
Heinrich M
HM
Jaeger
The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA.
Sidney R
SR
Nagel