Session MM: Granular Segregation
8:00 AM–10:10 AM, Tuesday, November 25, 2008
Room: 103B
Chair: Karen E. Daniels, North Carolina State University
Abstract ID: BAPS.2008.DFD.MM.8
Abstract: MM.00008 : Shear segregation of granular materials as a function of particle size and confining pressure
9:31 AM–9:44 AM
Preview Abstract
MathJax On | Off 
Abstract 
Authors:
Laura Golick
(North Carolina State University)
Karen Daniels
(North Carolina State University)
We experimentally investigate the dependence of granular shear segregation rates on particle size ratio and confining pressure. Within a cylindrical annulus, we shear two monodisperse layers of spherical glass beads, with an equal volume of small beads initially placed in a layer above the large. From changes in the height of the sample, we compute the mixing and segregation rates as a function of particle size ratio. We observe that contrasting as well as similar particle size ratios segregate and mix more slowly than intermediate particle sizes, in disagreement with kinetic sieving theory. Increasing pressure reduces the segregation and mixing rates.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.DFD.MM.8