Experimental measurement of the coefficient of restitution of irregular shaped particles impacting on horizontal surfaces

The coefficient of restitution (COR) is one of the fundamental particle properties needed in the setup of discrete element modelling (DEM) simulations. The more accurate the input parameters for DEM are, the more accurate the resulting simulation outputs will be. The determination of the COR for sph...

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Bibliographic Details
Published in:Chemical engineering science 2013-09, Vol.101, p.828-836
Main Author: Hastie, D.B.
Format: Article
Language:English
Subjects:
Angular velocity
Chemical engineering
Coefficient of restitution
Coefficients
Computer simulation
Discrete element method
equations
Granular materials
High speed
Irregular shaped particle
Mathematical models
Normal impact
pellets
polyethylene
Three dimensional
Three-dimensional analysis
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Summary:The coefficient of restitution (COR) is one of the fundamental particle properties needed in the setup of discrete element modelling (DEM) simulations. The more accurate the input parameters for DEM are, the more accurate the resulting simulation outputs will be. The determination of the COR for spherical particles is a relatively straightforward process, however, when considering irregular shaped particles, the unpredictable behaviour of particles after impact makes the analysis of the COR more involved. This paper presents an experimental method to determine the COR using high-speed video in a three-dimensional environment to capture the random behaviour of irregular shaped polyethylene pellets. The angular displacement and angular velocity of particles are experimentally determined and the process used to determine the coefficient of restitution using various equations is presented. [Display omitted] •Experimental investigation of coefficient of restitution.•Results to aid in accurate discrete element simulations.•Use of irregular shaped particles.•Variation of results analysed in three-dimensions.
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2013.07.010