Dilation of a vibrated granular layer
Department of Physics and Center for Nonlinear and Complex Systems
Duke University, Durham NC, 27708-0305, USA
Accepted: 3 October 1997
We report measurements of the dilation, , of a vertically shaken sand heap in the presence of air. These measurements were carried out for dimensionless accelerations , for particle diameters of , for layer height to particle diameter ratios of , and for shaking amplitudes of . is mostly limited to a thin avalanching surface layer. The vertical motion of this layer is well described by a simple model of an inelastic bouncing ball, independent of other complex motion elsewhere.
PACS: 46.10.+z – Mechanics of discrete systems / 47.20.-k – Hydrodynamic stability
© EDP Sciences, 1997