Vibration induced flow in hoppers: DEM 2D polygon model--颗粒学报PARTICUOLOGY

Fraige, F. Y., Langston, P. A., Matchett, A. J., & Dodds, J. (2008). Vibration induced flow in hoppers: DEM 2D polygon model. Particuology, 6(6), 455–466. https://doi.org/10.1016/j.partic.2008.07.019

Vibration induced flow in hoppers: DEM 2D polygon model

Feras Y. Fraige ^a, Paul A. Langston ^b *, Andrew J. Matchett ^c, John Dodds ^d

a Faculty of Mining and Environmental Engineering, Al-Hussein Bin Talal University Jordan, Ma’an, P.O. Box 20, Jordan
b Chemical and Environmental Engineering, Nottingham University, University Park, Nottingham NG7 2RD, UK
c Chemical Engineering, University of Teesside, Middlesbrough TS1 3BA, UK
d Centre RAPSODEE, Ecole Des Mines, Campus Jarland-81013 Albi, France

10.1016/j.partic.2008.07.019

Volume 6, Issue 6, December 2008, Pages 455-466

Received 23 March 2008, Accepted 15 July 2008, Available online 12 November 2008.

E-mail: P.Langston@nottingham.ac.uk

Highlights

Abstract

A two-dimensional discrete element model (DEM) simulation of cohesive polygonal particles has been developed to assess the benefit of point source vibration to induce flow in wedge-shaped hoppers. The particle–particle interaction model used is based on a multi-contact principle.

The first part of the study investigated particle discharge under gravity without vibration to determine the critical orifice size (B_c) to just sustain flow as a function of particle shape. It is shown that polygonal-shaped particles need a larger orifice than circular particles. It is also shown that Bc decreases as the number of particle vertices increases. Addition of circular particles promotes flow of polygons in a linear manner.

The second part of the study showed that vibration could enhance flow, effectively reducing B_c. The model demonstrated the importance of vibrator location (height), consistent with previous continuum model results, and vibration amplitude in enhancing flow.

Graphical abstract

Keywords

Bulk solids; Vibration; DEM; Hoppers; Materials handling; Polygon

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