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Measurement of granular temperature and velocity profile of granular flow in silos

Lookup NU author(s): Dr Vladimir Zivkovic

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Abstract

In this paper we report experimental results on the granular temperature and velocity profile of glass beads in steady-state flow inside a flat-bottomed silo. We found that the dynamics of the granular system during the discharge is stable on the mesoscopic scale. In particular, the ordered directional movement of particles can occur near the orifice. In addition, the correlation between the granular temperature distribution and velocity vector field is opposite in the radial and axial directions. According to the kinetic model, the main cause for the reversal of spatial correlation is that the intensity of the particle diffusion decrease with the decrease of silo height. This highlights a surprising and unrecognized role that the diffusion motion of particles plays in energy dissipation for hopper flow.

Publication metadata

Author(s): Chen Q, Li R, Xiu WZ, Zivkovic V, Yang H

Publication type: Article

Publication status: Published

Journal: Powder Technology

Year: 2021

Volume: 392

Pages: 123-129

Print publication date: 01/11/2021

Online publication date: 08/07/2021

Acceptance date: 04/07/2021

Date deposited: 15/07/2021

ISSN (print): 0032-5910

ISSN (electronic): 1873-328X

Publisher: Elsevier BV

URL: https://doi.org/10.1016/j.powtec.2021.07.007

DOI: 10.1016/j.powtec.2021.07.007

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