https://doi.org/10.1140/epje/i2004-10144-7
Regular Articles
Shearing behavior of polydisperse media
Institute for Computational Physics, University of Stuttgart, Pfaffenwaldring 27, 70569, Stuttgart, Germany
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Received:
29
July
2004
Accepted:
19
April
2005
Published online:
27
May
2005
Abstract
We study the shearing of polydisperse and bidisperse media with a size ratio of 10. Simulations are performed with a two-dimensional shear cell using contact dynamics. With a truncated power law for the polydisperse media we find that they show a stronger dilatancy and greater resistance to shearing than bidisperse mixtures. To model additives used to control viscosity we introduce so-called “point-like particles”. Even changing the kinematic behavior very little, the point-like particles reduce the force necessary to maintain a fixed shearing velocity.
PACS: 45.70.-n Granular systems – / 82.20.Wt Computational modeling; simulation – / 81.05.Rm Porous materials; granular materials –
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2005
