The uniform mixing of particles is crucial in many industrial applications. In industries, most granular materials are nonspherical, with ellipsoids being a common deviation from the sphere. The study employs the DEM model to investigate the mixing of a binary mixture in a vibrated packed bed with fixed amplitude and frequency. The study explores the behavior of the binary mixture of coarse and fine particles, with one particle being ellipsoid of aspect ratios (0.25–3.0) and the other being a sphere. The subdomain mixing index quantifies the mixing. The mixing of binary mixtures is determined by the aspect ratio of coarse and fine particles. The mixing efficiency is indicated by the average velocity of reference spherical particles, reflecting the convection strength within the bed. The results show higher average velocity in an ellipsoidal-sphere mixture than in a sphere-sphere mixture. The DEM results are validated with an identical experimental system.

中文翻译：

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离散元法研究椭球颗粒长径比对振动填充床混合的影响

颗粒的均匀混合在许多工业应用中至关重要。在工业中，大多数颗粒材料都是非球形的，椭圆体是与球体的常见偏差。该研究采用 DEM 模型来研究二元混合物在固定振幅和频率的振动填充床中的混合。该研究探讨了粗颗粒和细颗粒的二元混合物的行为，其中一个颗粒是长宽比为 (0.25–3.0) 的椭球体，另一个颗粒是球体。子域混合指数量化混合。二元混合物的混合由粗颗粒和细颗粒的长径比决定。混合效率由参考球形颗粒的平均速度表示，反映床内的对流强度。结果表明，椭球体-球体混合物中的平均速度高于球体-球体混合物中的平均速度。 DEM 结果通过相同的实验系统进行了验证。