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arXiv · 2103.07869

Experimental Test on Edwards Volume Ensemble of Tapped Granular Packings

Ye Yuan·Yi Xing·Jie Zheng·Zhifeng Li·Houfei Yuan·Shuyang Zhang·Zhikun Zeng·Chengjie Xia·Hua Tong·Walter Kob·Jie Zhang·Yujie Wang
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Abstract

Using X-ray tomography, we experimentally investigate granular packings subject to mechanical tapping for three types of beads with different friction coefficients. We validate Edwards volume ensemble in these three-dimensional granular systems and establish a granular version of thermodynamic zeroth law. Within Edwards framework, we also explicitly clarify how friction influences granular statistical mechanics as modifying the density of states, which allows us to determine the entropy as a function of packing fraction and friction subsequently. Additionally, we obtain a granular jamming phase diagram based on geometric coordination number and packing fraction.

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Ye Yuan, Yi Xing, Jie Zheng, Zhifeng Li, Houfei Yuan, Shuyang Zhang, Zhikun Zeng, Chengjie Xia, Hua Tong, Walter Kob, Jie Zhang, Yujie Wang. 2021-03-14. Experimental Test on Edwards Volume Ensemble of Tapped Granular Packings. https://doi.org/10.1103/physrevlett.127.018002

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