论文标题
通过环状剪切机制的颗粒状隔离机制
Granular Segregation Mechanisms by Cyclic Shear
论文作者
论文摘要
我们提出了一项X射线断层扫描研究，对三维剪切的双分散粒状培养基中示踪剂颗粒的分离机理。大型示踪剂被对流拖到顶部表面，然后由于对流横截面小而被困在那里，这导致隔离。此外，我们还发现，由于大示踪剂周围的拱形效应引起的局部结构不对称，将诱导示踪剂对其较小的邻居的净向上位移，这是隔离的另一种机制。
We present an X-ray tomography study of the segregation mechanisms of tracer particles in a three-dimensional cyclically sheared bi-disperse granular medium. Big tracers are dragged by convection to rise to the top surface and then remain trapped there due to the small downward convection cross-section, which leads to segregation. Additionally, we also find that the local structural up-down asymmetry due to arching effect around big tracers will induce the tracers to have a net upward displacement against its smaller neighbors, which is another mechanism for segregation.
