Potential Energy in a Three-Dimensional Vibrated Granular Medium Measured by NMR Imaging

Details Potential Energy in a Three-Dimensional Vibrated Granular Medium Measured by NMR Imaging Potential Energy in a Three-Dimensional Vibrated Granular Medium Measured by NMR Imaging

2000-01-10

arxiv.org/abs/cond-mat/0001115v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.85.298

Fast NMR imaging was used to measure the density profile of a three-dimensional granular medium fluidized by vertical vibrations of the container. For container acceleration much larger than gravity, the rise in center of mass of the granular medium is found to scale as (v0^alpha)/(N^beta) with alpha = 1.0 +/-0.2 and beta = 0.5 +/- 0.1, where v0 is the vibration velocity and N is the number of grains in the container. This value for alpha is significantly less than found previously for experiments and simulations in one dimension (alpha = 2) and two dimensions (alpha = 1.3-1.5).

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