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arXiv · 2502.06085

Effects of particle angularity on granular self-organization

Dominik Krengel·Haoran Jiang·Takashi Matsushima·Raphael Blumenfeld
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Abstract

Recent studies of two-dimensional poly-disperse disc systems revealed a coordinated self-organisation of cell stresses and shapes, with certain distributions collapsing onto a master form for many processes, size distributions, friction coefficients, and cell orders. Here we examine the effects of grain angularity on the indicators of self-organisation, using simulations of bi-disperse regular $N$-polygons and varying $N$ systematically. We find that: the strong correlation between local cell stresses and orientations, as well as the collapses of the conditional distributions of scaled cell stress ratios to a master Weibull form for all cell orders $k$, are independent of angularity and friction coefficient. In contrast, increasing angularity makes the collapses of the conditional distributions sensitive to changes in the friction coefficient.

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Dominik Krengel, Haoran Jiang, Takashi Matsushima, Raphael Blumenfeld. 2025-02-10. Effects of particle angularity on granular self-organization. https://doi.org/10.1103/7646-8fxy

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