Applied Mathematics and Mechanics (English Edition) ›› 2014, Vol. 35 ›› Issue (12): 1565-1572.doi: https://doi.org/10.1007/s10483-014-1886-6

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Packing induced bistable phenomenon in granular flow: analysis from complex network perspective

Mao-bin HU, Qi-yi LIU, Wang-ping SUN, Rui JIANG, Qing-song WU   

  1. School of Engineering Science, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2014-01-16 Revised:2014-05-21 Online:2014-12-01 Published:2014-12-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos.11034010 and 71171185)

Abstract: The effects of packing configurations on the phase transition of straight granular chute flow with two bottlenecks are studied. The granular flow shows a diluteto-dense flow transition when the channel width is varied, accompanied with a peculiar bistable phenomenon. The bistable phenomenon is induced by the initial packing configuration of particles. When the packing is dense, the initial flux is small and will induce a dense flow. When the packing is loose, the initial flux is large and will induce a dilute flow. The fabric network of granular packing is analyzed from a complex network perspective. The degree distribution shows quantitatively different characteristics for the configurations. A two-dimensional (2D) packing clustering coefficient is defined to better quantify the fabric network.

Key words: granular flow, complex network, phase transition, bistable phenomenon

2010 MSC Number: 

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