We show that in order to obtain realistic behaviour in Discrete Element modelling of show shearing flows of granular materials it is important to adopt a sufficiently long-ranged interaction force law that allows a highly extended degree of rotaional coupling between adjacent granules. This enables the granular assembly to consolidate and evolve microstructurally without requiring significant center of mass translational motion of the particles. Illustrative examples are provided from recent simulations carried out on model hoppers and in the formation of free-standing heaps by vertical feed.
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