Phase transition in peristaltic transport of frictionless granular particles
Phase transition in peristaltic transport of frictionless granular particles
复制标题
无摩擦颗粒蠕动运输中的相变
DOI：
10.1103/physreve.85.031302
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发表时间：
2012
影响因子：
2.4
通讯作者：
H.Hayakawa
中科院分区：
文献类型：
--
作者：
N.Yoshioka;H.Hayakawa
本文用数值方法研究了耗散粒子在管内蠕动运动驱动下的流动。通过观察蠕动管瓶颈临界宽度处的流速，发现了从缓慢的“无堵塞”流动到快速的“堵塞”流动的转变。研究还发现，过渡时间的平均值和波动以及流量二阶矩的峰值在临界点附近呈幂律发散，且在临界点附近满足标度关系。讨论了临界宽度和指数与蠕动速度和密度的关系。
Flows of dissipative particles driven by the peristaltic motion of a tube are numerically studied. A transition from a slow “unjammed” flow to a fast “jammed” flow is found through the observation of the flow rate at a critical width of the bottleneck of a peristaltic tube. It is also found that the average and fluctuation of the transition time, and the peak value of the second moment of the flow rate exhibit power-law divergence near the critical point and that these variables satisfy scaling relationships near the critical point. The dependence of the critical width and exponents on the peristaltic speed and the density is also discussed.