Bridges in Dry Granular Packings in Three Dimensions: Experiments and Simulations

Details Bridges in Dry Granular Packings in Three Dimensions: Experiments and Simulations Bridges in Dry Granular Packings in Three Dimensions: Experiments and Simulations

2011-12-14

arxiv.org/abs/1112.3146v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures

Scientific paper

In this Letter, we present the first experimental study of bridge structures in three-dimensional dry granular packings. Our experiments, which use X-ray tomography, confirm earlier simulation results: when bridges are small, they are predominantly 'linear', and have an exponential size distribution. Larger, predominantly 'complex' bridges, are confirmed to follow a power-law size distribution. We present simulation and experimental results for exponents governing size distribution and end-to-end length, and present also the distributions of base extensions and bridge orientations. While there is remarkable qualitative agreement overall between experiment and simulations, we note that quantitative agreement is improved when the free volumes available for particulate motion in each case, are comparable.

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