7 papers · 1 filter
Emergent medium-range order in amorphous silicon
Zhen Zhang, Stephen R. Elliott, Yujie Wang +1
Medium-range order (MRO) is an important feature of amorphous materials, but its nature in terms of atomic arrangement has remained elusive. Here, using large-scale machine-learnin…
Effective particle size governs structure and dynamics in rough hard-particle fluids
Nanqing Xiao, Zhen Zhang, Walter Kob +1
We numerically investigate how particle surface roughness affects the static and dynamic properties of a hard-particle fluid across a wide range of densities, rho. These simulation…
Statistical equivalence of reduced gravity and enhanced friction in granular packings
Haiyang Lu, Zhikun Zeng, Houfei Yuan +5
Using X-ray tomography, we compare granular packings prepared under buoyancy-reduced effective gravity with normal gravity packings of particles with systematically varied friction…
A Unified Glassy Rheology for Granular Matter
Zhikun Zeng, Jiazhao Xu, Hanyu Li +14
Granular flows are ubiquitous in nature and industrial applications, yet a complete continuum theory remains a long-standing challenge. The leading empirical approach, μ(I) rheolog…
Identifying Bridges from Asymmetric Load-Bearing Structures in Tapped Granular Packings
Chijin Zhou, Shuyang Zhang, Xueliang Dai +5
Using high-resolution x-ray tomography, we experimentally investigate the bridge structures in tapped granular packings composed of particles with varying friction coefficients. We…
Testing Adam-Gibbs relationship in tapped Granular Packings
Xinyu Ai, Houfei Yuan, Shuyang Zhang +4
Disordered granular packings share many similarities with supercooled liquids, particu-larly in the rapid increase of structural relaxation time within a narrow range of temperatur…
Dynamic constraints predict the relaxation of granular materials
Qinghao Mao, Yujie Wang, Walter Kob
Granular materials such as sand, powders, and food grains are ubiquitous in civil engineering, geoscience, agriculture, and medicine. While the influence of friction between the gr…