Dynamics of self-propelled particles in vibrated dense granular media.
Soft Matter
; 20(12): 2777-2788, 2024 Mar 20.
Article
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| MEDLINE
| ID: mdl-38444300
ABSTRACT
We study a system consisting of a few self-propelled particles (SPPs) placed among a crowd of densely packed granular particles that are vertically vibrated in a two-dimensional circular confinement. Our experiments reveal two important findings. First, an SPP exhibits a fractal renewal process within the dense granular medium, which induces a superdiffusive behavior whose diffusion exponent increases with its aspect ratio. Second, the SPPs eventually reach the boundary and form a moving cluster, which transitions from the moving state to the static state as the number of SPPs is increased. These results suggest a simple and effective method of modulating the fluidity and directionality of granular systems via controlling the shape and the number of SPPs.
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Colección:
01-internacional
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MEDLINE
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En
Revista:
Soft Matter
Año:
2024
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Article