Sautel Jérémy, Lecomte Charles-Édouard, Taberlet Nicolas
Université Lyon, ENS de Lyon, Université Claude Bernard, CNRS, Laboratoire de Physique UMR 5672, F-69342 Lyon, France.
Phys Rev E. 2021 Feb;103(2-1):022901. doi: 10.1103/PhysRevE.103.022901.
Although many previous studies have focused on the Brazil nut effect, segregation in a self-gravitating circular aggregate remains relatively unexplored. In this paper, size segregation in a two-dimensional assembly of grains in a circular geometry is studied through discrete element method (DEM) numerical simulations. We show that radial segregation within an asteroid submitted to periodic perturbations is not limited to the surface but also occurs in its core. The characteristic time and the overall efficiency of the segregation mechanism are studied as the intensity of the perturbation, the frictional properties, and rotational freedom of individual grains are varied.
尽管之前有许多研究聚焦于巴西坚果效应，但在自引力圆形聚集体中的分离现象仍相对未被充分探索。在本文中，通过离散元方法（DEM）数值模拟研究了圆形几何结构中二维颗粒集合体的尺寸分离。我们表明，遭受周期性扰动的小行星内部的径向分离不仅发生在表面，也发生在其核心。随着扰动强度、单个颗粒的摩擦特性以及旋转自由度的变化，对分离机制的特征时间和整体效率进行了研究。
