The mixing and segregation of granular materials are essential for industrial design and applications. In this work, the superquadric equation is used to construct spherical and non-spherical particles, and the discrete element method is used to investigate the radial segregation characteristics of a gaussian-dispersed mixture in a horizontal rotating drum. The influences of particle shape, standard deviation of the mixture, and rotating speed on the segregation behaviors are discussed by the gyration degree and mixing index. The results reveal that small and large particles are respectively distributed in the center and periphery of the drum, while the medium-sized particles are evenly distributed in the system. Larger standard deviation, smoother particle shape, and smaller rotation speed are conducive to the segregation of granular systems. When the granular system is close to the high-speed centrifugal state, the smallest particles have the largest radial velocity and are close to the drum wall.

粒状材料的混合和分离对于工业设计和应用至关重要。本工作采用超二次方程构造球形和非球形粒子，采用离散元法研究水平转鼓中高斯分散混合物的径向偏析特性。通过回转度和混合指数讨论了颗粒形状、混合物的标准偏差和转速对偏析行为的影响。结果表明，小颗粒和大颗粒分别分布在转鼓的中心和周边，而中等大小的颗粒均匀分布在系统中。较大的标准偏差、较平滑的颗粒形状和较小的转速有利于颗粒系统的分离。