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Numerical Analysis of Granular Flows in a Silo Bed on Flow Regime Characterization

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  • Xingtuan Yang
  • Nan Gui
  • Jiyuan Tu
  • Shengyao Jiang

Abstract

The flow characteristics of a gravity-driven dense granular flow in a granular bed with a contracted drainage orifice are studied by using discrete element method and quantitative analysis. Three values of discharging rates, ranging from fast to slow dense flows, are investigated. Time variations and derivatives of mean forces and velocities, as well as their respective correlations, are analyzed to quantitatively depict the characteristics of granular flow as well as flow regime categorization. The auto-correlation functions, as well as their Fourier spectrums, are utilized to characterize the differences between the mechanisms of slow and fast granular flows. Finally, it is suggested that the flow regimes of slow and fast flows can be characterized by the kinetic and kinematic flow properties of particles.

Suggested Citation

  • Xingtuan Yang & Nan Gui & Jiyuan Tu & Shengyao Jiang, 2015. "Numerical Analysis of Granular Flows in a Silo Bed on Flow Regime Characterization," PLOS ONE, Public Library of Science, vol. 10(3), pages 1-14, March.
    • Handle: RePEc:plo:pone00:0119155
    DOI: 10.1371/journal.pone.0119155
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