Granular materials are ubiquitous in our daily life and inherent in multitudinous industrial processes. Differences in the granular properties such as size and density inevitably induce segregation. By means of the discrete element method, a binary-size mixture in a three-dimensional rotating drum is numerically simulated to explore the segregation dynamics of the granular material along the axial direction. Snapshots of the distribution of the two particle types in the rotating drum are presented with respect to time to illustrate the spatial evolution of the size-induced segregation structure. The space-time plots of various axial characteristics indicate that (i) radial segregation does not affect the axial distribution of total mass and mass fraction, but axial segregation leads to the formation of axial bands; (ii) greater non-dimensionalized collision forces for both the large and small particles develop where the large particles dominate; and (iii) axial segregation gives rise to the variation of t...

中文翻译：

---

二元颗粒混合物在三维转鼓中轴向离析动力学的数值研究

颗粒材料在我们的日常生活中无处不在，并且存在于众多工业过程中。粒度和密度等颗粒特性的差异不可避免地会导致偏析。通过离散元法，对三维转鼓中的二元尺寸混合物进行数值模拟，探索颗粒材料沿轴向的离析动力学。旋转鼓中两种颗粒类型分布的快照随时间呈现，以说明尺寸诱导分离结构的空间演变。各种轴向特征的时空图表明(i)径向偏析不影响总质量和质量分数的轴向分布，但轴向偏析导致轴向带的形成；(ii) 在大粒子占主导地位的地方，大粒子和小粒子的无量纲化碰撞力都更大；(iii) 轴向偏析导致 t...