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Effects of vertical vibration on hopper flows of granular material

Wassgren, C. R. and Hunt, M. L. and Freese, P. J. and Palamara, J. and Brennen, C. E. (2002) Effects of vertical vibration on hopper flows of granular material. Physics of Fluids, 14 (10). pp. 3439-3448. ISSN 1070-6631. doi:10.1063/1.1503354.

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The discharge of granular material from a hopper subject to vertical sinusoidal oscillations was investigated using experiments and discrete element computer simulations. With the hopper exit closed, side-wall convection cells are observed, oriented such that particles move up along the inclined walls of the hopper and down at the center line. The convection cells are a result of the granular bed dilation during free fall and the subsequent interaction with the hopper walls. The mass discharge rate for a vibrating hopper scaled by the discharge rate without vibration reaches a maximum value at a dimensionless velocity amplitude just greater than 1. Further increases in the velocity decrease the discharge rate. The decrease occurs due to a decrease in the bulk density of the discharging material when vibration is applied.

Item Type:Article
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Hunt, M. L.0000-0001-5592-2334
Additional Information:Received 30 August 2001; accepted 9 July 2002; published 3 September 2002.
Issue or Number:10
Record Number:CaltechAUTHORS:WASpf02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:168
Deposited By: Christopher Brennen
Deposited On:09 Nov 2004
Last Modified:08 Nov 2021 19:00

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