Similarity of wet granular packing to gels

Jindong Li, Yixin Cao, Chengjie Xia, Binquan Kou, Xianghui Xiao, Kamel Fezzaa and Yujie Wang ()
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Jindong Li: Shanghai Jiao Tong University
Yixin Cao: Shanghai Jiao Tong University
Chengjie Xia: Shanghai Jiao Tong University
Binquan Kou: Shanghai Jiao Tong University
Xianghui Xiao: Advanced Photon Source, Argonne National Laboratory
Kamel Fezzaa: Advanced Photon Source, Argonne National Laboratory
Yujie Wang: Shanghai Jiao Tong University

Nature Communications, 2014, vol. 5, issue 1, 1-7

Abstract: Abstract To date, there is still no general consensus on the fundamental principle that governs glass transition. Colloidal suspensions are ordinarily utilized as model systems to study the dynamical arrest mechanisms in glass or gels. Here, we tackle the problem using athermal granular particles. Slow dynamics and structural evolution of granular packing upon tapping are monitored by fast X-ray tomography. When the packing are wet and short-range attractive interactions exist, we find a large amount of locally favoured structures with fivefold symmetry, which bear great structural similarity to colloidal gels. In addition, these structures are almost absent in dry packing with similar packing fractions. The study leads strong support for the geometrical frustration mechanism for dynamic arrest in both thermal and athermal systems with attractive interactions. It also suggests nontrivial structural mechanism, if exists, for dynamic arrest in systems with purely repulsive interactions.

Date: 2014
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DOI: 10.1038/ncomms6014

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