Abstract
An influence of the particle aspect ratio in a range from 1 to 1.6 and the coefficients of particle – particle and particle – wall friction of dimer-shaped particles discharging from a flat-bottomed, cylindrical container on the mass discharge rate (MDR) was investigated using a discrete element method. The impact of the friction coefficients on the MDR was found to be stronger when compared to the effect of elongation. The most significant changes in MDR, influenced by friction, were observed for µpp < 0.2. For spherical particles with µpp < 0.4, the orifice diameter producing uncertain flow spread out from 4.2 to 4.7 particle diameters. No flow fluctuations were observed as coefficient of friction decreased below 0.2.
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