Species Segregation and Dynamical Instability of Horizontally Vibrated Granular Mixtures

Massimo Pica Ciamarra, Alessandro Sarracino, Mario Nicodemi and Antonio Coniglio
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Massimo Pica Ciamarra: Università di Napoli “Federico II” INFM-Coherentia, INFN and AMRA, Dip.to di Scienze Fisiche
Alessandro Sarracino: Università di Napoli “Federico II” INFM-Coherentia, INFN and AMRA, Dip.to di Scienze Fisiche
Mario Nicodemi: Università di Napoli “Federico II” INFM-Coherentia, INFN and AMRA, Dip.to di Scienze Fisiche
Antonio Coniglio: Università di Napoli “Federico II” INFM-Coherentia, INFN and AMRA, Dip.to di Scienze Fisiche

A chapter in Traffic and Granular Flow’05, 2007, pp 41-51 from Springer

Abstract: Summary We review recent results about the segregation process of a granular mixture of disks on an horizontally oscillating tray. In this condition an initially disordered mixture first segregates via the formation of stripes perpendicular to the driving direction; then stripes merge in a coarsening process. We discuss quantitatively both the short-time and the long-time dynamics of the system, and the dependence of the observed phenomenology on the frequency and amplitude of oscillation of the tray. The same system is also investigated when, instead of being disordered, is initially prepared in two stripes parallel to the driving direction. In this condition the interface between the two stripes manifests an instability which again leads to the formation of stripes perpendicular to the driving direction. Finally, we shortly review the mechanism which have been proposed in order to explain the observed segregation process.

Keywords: Binary Mixture; Dynamical Instability; Striped Pattern; Segregation Process; Driving Direction (search for similar items in EconPapers)
Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-47641-2_3

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DOI: 10.1007/978-3-540-47641-2_3

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