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The Discrete Element Method (DEM) is widely used in the simulation of a particle system. The viscoelastic contact models are the most common ones in the DEM simulation. However, these models stills have a few unrealistic behaviors, which will influence the reasonableness and accuracy of the simulation results. A general form of damping coefficient is proposed through dimensional analysis, and the...
Linear-spring dashpot model is one of the major contact models applied to the DEM (discrete element method) simulation of the tumbling ball mills. The model parameters such as stiffness, damping coefficient, coefficient of restitution and coefficient of friction, significantly influence the calculation of contact forces and the selection of the critical time step. However, there is no standard as...
The transportation of bulk materials is of importance in many industrial applications, ranging from minerals, agriculture, pharmaceuticals, chemicals, pigments, plastics, cement, sand, salt and food processing. Screw conveyors are widely used for transportation of particulates at controlled and steady rates. In this paper, we use the Discrete Element Method (DEM) to analyze the performance of a screw...
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