EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||30 June 2017|
Dense, inhomogeneous shearing flows of spheres
1 Dept. of Civil and Environmental Engineering, Politecnico di Milano, 20133 Milano, Italy
2 School of Civil and Environmental Engineering, Cornell University, 14850 Ithaca, NY, USA
* Corresponding author: email@example.com
Published online: 30 June 2017
We make use of recent extensions of kinetic theory of granular gases to include the role of particle stiffness in collisions to deal with pressure-imposed shearing flows between bumpy planes in relative motion, in which the solid volume fraction and the intensity of the velocity fluctuations are not uniformly distributed in the domain. As in previous numerical simulations on the flow of disks in an annular shear cell, we obtain an exponential velocity profile in the region where the volume fraction exceeds the critical value at which a rate-independent contribution to the stresses arises. We also show that the thickness of the inertial region, where the solid volume fraction is less than the critical value, and the shear stress at the moving boundary are determined functions of the relative velocity of the boundaries.
© The Authors, published by EDP Sciences, 2017
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