Measurements of Grain Motion in a Dense, Three-Dimensional Granular Fluid

Preprint

29 November 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0108256

Abstract

We have used an NMR technique to measure the short-time, three-dimensional displacement of grains in a system of mustard seeds vibrated vertically at 15g. The technique averages over a time interval in which the grains move ballistically, giving a direct measurement of the granular temperature profile. The dense, lower portion of the sample is well described by a recent hydrodynamic theory for inelastic hard spheres. Near the free upper surface the mean free path is longer than the particle diameter and the hydrodynamic description fails.

Keywords

DIMENSIONAL GRANULAR
TECHNIQUE TO MEASURE
TECHNIQUE AVERAGES
GRANULAR FLUID
GRAIN MOTION
HYDRODYNAMIC
VIBRATED
MUSTARD
GRAINS

All Related Versions

Version 1, 2001-08-16, ArXiv
Version 2, 2001-08-16, ArXiv
Version 3, 2001-11-29, ArXiv
Published version: Physical Review Letters, 88 (4), 044301.

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