Particle kinematics in a dilute, three-dimensional, vibration-fluidized granular medium.
We report an experimental study of particle kinematics in a three-dimensional system of inelastic spheres fluidized by intense vibration. The motion of particles in the interior of the medium is tracked by high-speed video imaging, yielding a spatially resolved measurement of the velocity distribution. The distribution is wider than a Gaussian and broadens continuously with increasing volume fraction. The deviations from a Gaussian distribution for this boundary-driven system are different in sign and larger in magnitude than predictions for homogeneously driven systems. We also find correlations between velocity components which grow with increasing volume fraction.
Wang
Hong-Qiang
HQ
Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003-3720, USA. hqwang@physics.umass.edu
Feitosa
Klebert
K
Menon
Narayanan
N
D001696:Biomechanical Phenomena; D003102:Colloids / Q000737:chemistry*; D003198:Computer Simulation; D008863:Microspheres; D008956:Models, Chemical; D010316:Particle Size; D012996:Solutions / Q000737:chemistry*; D014732:Vibration
D003102:Colloids; D012996:Solutions