Pattern formation in a fully-3D segregating granular flow
Abstract
Segregation patterns of size-bidisperse particle mixtures in a fully-three-dimensional flow produced by alternately rotating a spherical tumbler about two perpendicular axes are studied over a range of particle sizes and volume ratios using both experiments and a continuum model. Pattern formation results from the interaction of size segregation with chaotic regions and non-mixing islands of the flow. Specifically, large particles in the flowing surface layer are preferentially deposited in non-mixing islands despite the effects of collisional diffusion and chaotic transport. The protocol-dependent structure of the unstable manifolds of the flow surrounding the non-mixing islands provides further insight into why certain segregation patterns are more robust than others.
Cite
@article{arxiv.1901.02988,
title = {Pattern formation in a fully-3D segregating granular flow},
author = {Mengqi Yu and Paul B. Umbanhowar and Julio M. Ottino and Richard M. Lueptow},
journal= {arXiv preprint arXiv:1901.02988},
year = {2019}
}