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Species Segregation and Dynamical Instability of Horizontally Vibrated Granular Mixtures

In: Traffic and Granular Flow’05

Author

Listed:
  • 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)

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.

Suggested Citation

  • Massimo Pica Ciamarra & Alessandro Sarracino & Mario Nicodemi & Antonio Coniglio, 2007. "Species Segregation and Dynamical Instability of Horizontally Vibrated Granular Mixtures," Springer Books, in: Andreas Schadschneider & Thorsten Pöschel & Reinhart Kühne & Michael Schreckenberg & Dietrich E. Wol (ed.), Traffic and Granular Flow’05, pages 41-51, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-47641-2_3
    DOI: 10.1007/978-3-540-47641-2_3
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