Segregation and Stability of Binary Granular Mixtures

Details Segregation and Stability of Binary Granular Mixtures Segregation and Stability of Binary Granular Mixtures

2007-06-06

arxiv.org/abs/0706.0774v1

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 7 figures

Scientific paper

We measure stability of two-dimensional granular mixtures in a rotating drum and relate grain configurations to stability. For our system, the smaller but smoother grains cluster near the center of the drum, while the larger, rougher grains remain near the outer edge. One consequence of the size segregation is that the smaller grains heavily influence the stability of the heap. We find that the maximum angle of stability is a non-linear function of composition, changing particularly rapidly when small grains are first added to a homogeneous pile of large grains. We conclude that the grain configuration within the central portion of the heap plays a prominent role in stability.

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