EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Particle shape effects|
|Published online||30 June 2017|
Towards minimal models for realistic granular materials: Tomographic analysis of bidispersed assemblies of ellipsoids
1 Institut für theoretische Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen, Germany
2 Centre for Plasmas and Fluids, Research School of Physics and Engineering, Australian National University, Canberra ACT 2601, Australia
3 School of Engineering and Information Technology, Murdoch University, Murdoch WA 6150, Australia
4 Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra ACT 2601, Australia
Published online: 30 June 2017
In this paper, we report experimental results on granular compaction in a model system made of mono- and bidisperse ellipsoidal packings as well as sand packings with grain size polydispersity. The packings are subject to vertical tapping of varying duration (number of taps) and their internal three-dimensional structure is obtained using x-ray computed tomography. Particles positions and orientations are reconstructed and the global packing densities are computed. The analysis of the vertical and horizontal local packing fraction profiles reveal a homogeneous densification in the ellipsoidal packings, however, sand packings exhibit radial density gradient, possibly linked to the onset of convection.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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