Particle kinematics in a dilute, 3-dimensional, vibration-fluidized granular medium

Details Particle kinematics in a dilute, 3-dimensional, vibration-fluidized granular medium Particle kinematics in a dilute, 3-dimensional, vibration-fluidized granular medium

2009-12-09

arxiv.org/abs/0912.1657v1

Phys. Rev. E 80, 060304(R) (2009)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevE.80.060304

We report an experimental study of particle kinematics in a 3-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.

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