Collective Drifts in Vibrated Granular Packings: The Interplay of Friction and Structure

We simulate vertically shaken dense granular packings with horizontal periodic boundary conditions. A coordinated translating motion of the whole medium emerges when the horizontal symmetry is broken by disorder or defects in the packing and the shaking is weak enough to conserve the structure. We a...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2022-05, Vol.128 (20), p.208001-208001, Article 208001
Main Authors: Plati, A, Puglisi, A
Format: Article
Language:English
Subjects:
Condensed Matter
Physics
Soft Condensed Matter
Statistical Mechanics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We simulate vertically shaken dense granular packings with horizontal periodic boundary conditions. A coordinated translating motion of the whole medium emerges when the horizontal symmetry is broken by disorder or defects in the packing and the shaking is weak enough to conserve the structure. We argue that such a drift originates in the interplay between structural symmetry breaking and frictional forces transmitted by the vibrating plate. A nonlinear ratchet model with stick slips reproduces many faces of the phenomenon. The collective motion discussed here underlies phenomena observed recently with vibrofluidized granular materials, such as persistent rotations and anomalous diffusion.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.128.208001