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Bifurcations of a Driven Granular System under Gravity

In: Traffic and Granular Flow’01

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  • M. Isobe

    (Kanazawa University, Department of Computational Science)

Abstract

The molecular dynamics study on the granular bifurcation in a simple model is presented. The model consists of hard disks, which undergo inelastic collisions; the system is under the uniform external gravity and is driven by the heat bath. The competition between the two effects, namely, the gravitational force and the heat bath, is carefully studied. We found that the system shows three phases, the condensed phase, the locally fluidized phase, and the granular turbulent phase, upon increasing the external control parameter. We conclude that the transition from the condensed phase to the locally fluidized phase is distinguished by the existence of fluidized holes, and the transition from the locally fluidized phase to the granular turbulent phase is understood by the destabilization transition of the fluidized holes due to mutual interference.

Suggested Citation

  • M. Isobe, 2003. "Bifurcations of a Driven Granular System under Gravity," Springer Books, in: Minoru Fukui & Yuki Sugiyama & Michael Schreckenberg & Dietrich E. Wolf (ed.), Traffic and Granular Flow’01, pages 461-465, Springer.
    • Handle: RePEc:spr:sprchp:978-3-662-10583-2_46
    DOI: 10.1007/978-3-662-10583-2_46
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