Lumay G, Vandewalle N
GRASP, Département de Physique, Université de Liège, B-4000 Liège, Belgium.
Phys Rev Lett. 2005 Jul 8;95(2):028002. doi: 10.1103/PhysRevLett.95.028002. Epub 2005 Jul 7.
We present an original experimental study of the compaction dynamics for two-dimensional granular systems. Compaction dynamics is measured at three different scales: the macroscopic scale through the normalized packing fraction rho, the mesoscopic scale through the normalized fraction phi of hexagonal domains in the system, and the microscopic scale through the grain mobility mu. Moreover, the hexagonal domains are found to obey a growth process dominated by the displacement of domain boundaries. A global picture of compaction dynamics relevant at each scale is proposed.
我们展示了一项关于二维颗粒系统压实动力学的原创性实验研究。压实动力学在三个不同尺度上进行测量：宏观尺度通过归一化堆积分数ρ，介观尺度通过系统中六边形区域的归一化分数φ，微观尺度通过颗粒迁移率μ。此外，发现六边形区域遵循由区域边界位移主导的生长过程。提出了在每个尺度上相关的压实动力学全局图景。
