Dynamical regimes and stability of circular granular ratchets

Mueller, Patric; Gallas, Jason A. C.; Poeschel, Thorsten

doi:10.1038/s41598-017-12588-w

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Dynamical regimes and stability of circular granular ratchets

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Gallas, Jason A. C.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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https://www.nature.com/articles/s41598-017-12588-w
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Citation

Mueller, P., Gallas, J. A. C., & Poeschel, T. (2017). Dynamical regimes and stability of circular granular ratchets. Scientific Reports, 7: 12723. doi:10.1038/s41598-017-12588-w.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002E-9059-4

Abstract

Ratchets are simple mechanical devices which combine spatial asymmetry and nonequilibrium to produce counterintuitive transport of particles. The operation and properties of linear ratchets have already been extensively explored. However, very little is known about circular granular ratchets, startling devices able to convert vertical vibrations into rotations of the device. Here, we report results of systematic numerical investigations of the operational characteristics of circular granular ratchets. Several distinct behaviors are identified and explained in terms of the inner flow fields of the ratchet. All dynamical regimes found are robust and should not be difficult to observe in laboratory experiments.