Experimental Study and DEM Modelling of the Contact Behaviour of Cylindrical Particles
In this work, the influence of loading direction (contact geometry) and deformation behaviour (from elastic to plastic) on cylindrical particles during compression and shearing is investigated. The compression tests are performed with a Texture AnalyserÂ®. For the measurement of particle-wall sliding friction, a self-developed setup at the University of Kaiserslautern is used. During the measurement of tangential forces, the particles are fixed to a flat holder and moved over a defined wall surface at different normal loads. In addition, experiments in a fluid bed rotor granulator equipped with a Magnetic Particle Tracking (MPT) system  are conducted in order to visualize and quantify the real particle kinetics and dynamics.
The intention of these investigations is the experimental calibration of contact models, which can be applied for numerical DEM studies of fluidization processes with cylindrical particles.
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 Neuwirth, J., Antonyuk, S., Heinrich, S., Jacob, M.: CFD-DEM study and direct measurement of the granular flow in a rotor granulator, Chemical Engineering Science 86 (2013), 151-163.