Papers Published

1. Haff, P. K. and Werner, B. T., COMPUTER SIMULATION OF THE MECHANICAL SORTING OF GRAINS., Powder Technology, vol. 48 no. 3 (1986), pp. 239 - 245 [0032-5910(86)80048-1] .
   (last updated on 2007/04/10)

   Abstract:
   A two-dimensional system of inelastic frictional disks all of equal diameter save one was studied by computer simulation. A single large disk was placed on the bottom of a container and covered by 30 smaller disks. When the container was agitated to induce a shear motion in the disk assembly, the large particle showed a tendency to rise toward the surface. This sorting process was mediated by shear-driven rotational motion, the large grain rolling up on top of neighboring small grains. The grain-grain friction coefficient is a critical parameter in this kind of sorting process.

   Keywords:
   CLASSIFIERS - Computer Simulation;GRANULAR MATERIALS - Friction;FLOW OF FLUIDS - Granular Materials;