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arXiv · 2009.08031

Granular Segregation Mechanisms by Cyclic Shear

Zhifeng Li·Zhikun Zeng·Yi Xing·Jindong Li·Jie Zheng·Qinghao Mao·Jie Zhang·Meiying Hou·Yujie Wang
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Abstract

We present an X-ray tomography study of the segregation mechanisms of tracer particles in a three-dimensional cyclically sheared bi-disperse granular medium. Big tracers are dragged by convection to rise to the top surface and then remain trapped there due to the small downward convection cross-section, which leads to segregation. Additionally, we also find that the local structural up-down asymmetry due to arching effect around big tracers will induce the tracers to have a net upward displacement against its smaller neighbors, which is another mechanism for segregation.

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Zhifeng Li, Zhikun Zeng, Yi Xing, Jindong Li, Jie Zheng, Qinghao Mao, Jie Zhang, Meiying Hou, Yujie Wang. 2020-09-17. Granular Segregation Mechanisms by Cyclic Shear. https://arxiv.org/abs/2009.08031

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