Ratchet-Induced Segregation and Transport of Non-Spherical Grains

Abstract

We consider through simulations the behavior of elongated grains on a vibrating ratchet-shaped base. We observe differences in layer velocity profile and in net grain velocity for grains that are composed of one, two, or three colinear spheres. In the case of mixtures of different species of grains, we demonstrate layer-by-layer variation in the average velocity as well as layer segregation of species, and show that horizontal separation of the species can be achieved using this geometry. We also find that the addition of a small number of shorter grains to a sample of long grains provides a lubrication effect that increases the velocity of the long grains.

8 pages, 7 postscript figures

References in corpus (5)

• Simulation of rotating drum experiments using non-circular particles
• A new mechanism for granular segregation
• Stratified horizontal flow in vertically vibrated granular layers
• Segregation of granular binary mixtures by a ratchet mechanism
• The Influence of Shape on Ordering of Granular Systems in Two Dimensions

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