Dynamics of wet granular hexagons

Abstract

The collective behavior of vibrated hexagonal disks confined in a monolayer is investigated experimentally. Due to the broken circular symmetry, hexagons prefer to rotate upon sufficiently strong driving. Due to the formation of liquid bridges, short-ranged cohesive interactions are introduced upon wetting. Consequently, a nonequilibrium stationary state with the rotating disks self-organized in a hexagonal structure arises. The bond length of the hexagonal structure is slightly smaller than the circumdiameter of a hexagon, indicating geometric frustration. This investigation provides an example where the collective behavior of granular matter is tuned by the shape of individual particles.

arXiv comment5 pages, 5 figures

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Cited by in corpus (2)

• Wave propagation and pattern formation in two-dimensional hexagonally-packed granular crystals under various configurations
• Stress propagation in locally loaded packings of disks and pentagons