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Granular Flow in Vertical Pipes: Transition from Dilute to Dense

In: Traffic and Granular Flow’01

Author

Listed:
  • M. Hou

    (Chinese Academy of Sciences, Institute of Physics)

  • W. Chen

    (Chinese Academy of Sciences, Institute of Physics)

  • T. Zhang

    (Chinese Academy of Sciences, Institute of Physics)

  • K. Lu

    (Chinese Academy of Sciences, Institute of Physics)

Abstract

The transition from dilute flow to dense flow of a granular system in a vertical pipe, controlled by an electric field E, is studied. Depending upon its initial state and the applied field voltage the controlled flow rate remains in two phases, dilute flow or dense flow. For dilute flow, the electric field has no effect on the flow rate until V reaches a critical value V1. At V = V1, the flow rate drops abruptly and a transition of the particulate from dilute to dense flow occurs. For dense flow, the flow rate decreases monotonically with in­creasing V. A comparison of the flow rate controlled by directly changing the opening size is given. Similar behavior is observed. A 3-dimensional phase diagram with outflow rate, inflow rate and opening size as its three axes is also presented.

Suggested Citation

  • M. Hou & W. Chen & T. Zhang & K. Lu, 2003. "Granular Flow in Vertical Pipes: Transition from Dilute to Dense," Springer Books, in: Minoru Fukui & Yuki Sugiyama & Michael Schreckenberg & Dietrich E. Wolf (ed.), Traffic and Granular Flow’01, pages 473-478, Springer.
    • Handle: RePEc:spr:sprchp:978-3-662-10583-2_48
    DOI: 10.1007/978-3-662-10583-2_48
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