Vertically shaken column of spheres. Onset of fluidization
Materials Science
2007-05-23 v1
Abstract
The onset of surface fluidization of granular material in a vertically vibrated container, z=A cos(\omega t), is studied experimentally. Recently, for a column of spheres it has been theoretically found that the particles lose contact if a certain condition for the acceleration amplitude \ddot{z} \equiv A\omega^2/g = f(\omega) holds. This result is in disagreement with other findings where the criterion \ddot{z}=\ddot{z}_{crit}=const. was found to be the criterion of fluidization. We show that for a column of spheres a critical acceleration is not a proper criterion for fluidization and compare the results with theory.
Cite
@article{arxiv.cond-mat/0203373,
title = {Vertically shaken column of spheres. Onset of fluidization},
author = {Simon Renard and Thomas Schwager and Thorsten Poeschel and Clara Saluena},
journal= {arXiv preprint arXiv:cond-mat/0203373},
year = {2007}
}
Comments
7 pages, 11 figures