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Fluctuations of particles inside flat-bottomed funnel flow silo
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  • Dangcheng Zhang,
  • Xiaodong Yang,
  • Jinhui Zhan,
  • Xiaoxing Liu
Dangcheng Zhang
Institute of Process Engineering Chinese Academy of Sciences
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Xiaodong Yang
Institute of Process Engineering Chinese Academy of Sciences
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Jinhui Zhan
Institute of Process Engineering Chinese Academy of Sciences
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Xiaoxing Liu
Institute of Process Engineering Chinese Academy of Sciences
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Abstract

In this work the flow behavior of granular material in flat-bottomed funnel flow silos was investigated through 3D Discrete Element Method (DEM) simulations. It is observed that particles in the flowing zone move collectively, manifested by the oscillatory fluctuations of the averaged particle vertical velocity and the non-Gaussian characteristics of the fluctuations of individual velocity around average. The delayed correlations of velocity fluctuation and the Fourier spectrums of velocity and contact force between particles were analyzed to characterize the propagation of flow fluctuation. It is found that there exist two special vertical positions in the converging zone. The lower one corresponds to the emission source from which the velocity wave propagates both upwards and downwards. The higher one locates at the upper boundary of converging zone and is characterized by the most violent fluctuation of contact force. Possible mechanisms of the appearances of these two vertical positions are discussed.

Peer review status:UNDER REVIEW

21 Oct 2020Submitted to AIChE Journal
22 Oct 2020Submission Checks Completed
22 Oct 2020Assigned to Editor
13 Nov 2020Reviewer(s) Assigned
06 Jan 2021Editorial Decision: Revise Major
06 Feb 20211st Revision Received
10 Feb 2021Submission Checks Completed
10 Feb 2021Assigned to Editor
20 Feb 2021Reviewer(s) Assigned
20 Apr 2021Editorial Decision: Revise Major
12 May 20212nd Revision Received
15 May 2021Submission Checks Completed
15 May 2021Assigned to Editor
18 May 2021Reviewer(s) Assigned