Discrete element modelling of a chevron patterned conveyor belt and a transfer chute

The Discrete Element Method (DEM) is increasingly used to analyse the design of conveyor systems. In this study, the capability of, and accuracy with which DEM can predict the flow of a non-cohesive granular material through a transfer chute was investigated. The model included a Chevron patterned belt, an impact plate, hood, and rock box. The results were compared to measurements using high-speed footage. The model parameter values were determined and the particle shape modelled as single spheres and multi-spheres. To decrease computation time, particle up-scaling, simplification of the shape model, and decreasing the contact stiffness were investigated. Results showed that DEM could accurately predict the flow characteristics, and was more accurate than analytical approaches. It is concluded that DEM can be used with confidence in modelling similar applications if a calibrated parameter set is used, and the guidelines presented here in terms of particle scaling, are adhered to. [Display omitted] •DEM can accurately model transfer points.•Chevron pattern should be included in model.•Particle shape has no significant influence.•The sliding friction is most sensitive parameter.•Particle scaling should be carefully considered.