This study focusses on the hopper discharge characteristics of lognormal particle size distributions (PSDs) of non-spherical particles (namely, ellipsoids, cylinders and cuboids). Discrete element method is employed to understand the coupled effects of sphericity and lognormal PSD width. The results reveal that: (i) the ellipsoids have the most similar discharge behaviors with the spheres, but the differences increase as the PSD width increases; (ii) the packing density in the hopper increases as PSD width increases and particle sphericity decreases; (iii) regardless of sphericity, the discharge rate decreases and the jamming probability increases as the PSD width increases; (iv) for the same PSD width, the jamming probability is the greatest for cuboids and least for the ellipsoids; and (v) the lower-sphericity cylinder and cuboid have some residual particles left in the hopper upon complete discharge, and the number of residues is greater and increases with PSD width for the latter. The results provide new insights regarding the behavior of wide PSDs of non-spherical particles in the hopper, highlighting the non-negligible impact of the coupled effect of PSD and particle non-sphericity.

这项研究集中于非球形颗粒（即椭球，圆柱体和长方体）的对数正态粒度分布（PSD）的料斗排放特性。采用离散元方法来了解球形度和对数法线PSD宽度的耦合效应。结果表明：（i）椭球与球体的放电行为最相似，但随着PSD宽度的增加，差异增大。（ii）随着PSD宽度的增加和颗粒球形度的降低，料斗中的填充密度增加；（iii）不管球形度如何，随着PSD宽度的增加，放电率会降低并且干扰概率会增加；（iv）对于相同的PSD宽度，长方体的干扰概率最大，而椭圆体的干扰概率最小；（v）低球形圆柱体和长方体在完全排出后在漏斗中残留一些残留颗粒，残留物的数量更多，并且随着后者的PSD宽度而增加。结果提供了有关料斗中非球形颗粒宽PSD行为的新见解，突出了PSD和颗粒非球形性耦合效应的不可忽略的影响。