A hybrid particle-geometric scaling approach for elasto-plastic adhesive DEM contact models

A hybrid particle-geometric scaling approach for elasto-plastic adhesive DEM contact models

Mohajeri, M. (TU Delft Transport Engineering and Logistics)
Helmons, R.L.J. (TU Delft Offshore and Dredging Engineering)
van Rhee, C. (TU Delft Offshore and Dredging Engineering; TU Delft Rivers, Ports, Waterways and Dredging Engineering)
Schott, D.L. (TU Delft Transport Engineering and Logistics)

2020

The computation time of Discrete Element Method (DEM) simulations increases exponentially when particle size is reduced or the number of particles increased. This critical challenge limits the use of DEM simulation for industrial applications, such as powder flow in silos. Scaling techniques can offer a solution to reduce computation time. In this paper, we have developed a hybrid particle-geometric scaling approach with a focus on Elasto-Plastic Adhesive contact models. It established relationships between particle scaling factors and DEM contact input parameters. The isolated effects of varying particle size and geometric dimensions on bulk properties were also evaluated using uniaxial consolidation, static angle of repose, and ring shear tests. This paper shows how the particle scaling can be applied together with geometric scaling to incorporate two important aspects of bulk materials, their Elasto-Plastic behaviour and their cohesive forces.

Angle of repose
Coarse graining
Cohesive bulk materials
Particle-geometric scaling
Ring shear test
Uni-axial consolidation

http://resolver.tudelft.nl/uuid:4c951dde-de88-4133-89ab-675488531b59

https://doi.org/10.1016/j.powtec.2020.05.012

0032-5910

Powder Technology, 369, 72-87

Institutional Repository

journal article

© 2020 M. Mohajeri, R.L.J. Helmons, C. van Rhee, D.L. Schott