Growing length and time scales in a suspension of athermal particles
Growing length and time scales in a suspension of athermal particles
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DOI：
10.1103/physreve.79.050301
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发表时间：
2009-05-01
影响因子：
2.4
通讯作者：
Hatano, Takahiro
中科院分区：
文献类型：
--
作者：
Hatano, Takahiro
我们模拟非布朗粒子在剪切粘性介质中的弛豫过程；系统受到较小的剪切应变，然后发生松弛。我们估计当密度从下方接近干扰密度时弛豫时间和相关长度发散的指数。特别是，动态临界指数估计为 4.6(2)。研究还发现，剪切应力在干扰密度下经历幂律衰减，这让人想起临界减速。
We simulate a relaxation process of non-Brownian particles in a sheared viscous medium; the system is subject to the small shear strain and then undergoes relaxation. We estimate the exponents with which the relaxation time and the correlation length diverge as the density approaches the jamming density from below. In particular, the dynamic critical exponent is estimated as 4.6(2). It is also found that shear stress undergoes power-law decay at the jamming density, which is reminiscent of critical slowing down.