Orientational Ordering in Athermally Sheared, Aspherical, Frictionless Particles.
Orientational Ordering in Athermally Sheared, Aspherical, Frictionless Particles.
复制标题
无热剪切、非球面、无摩擦粒子的定向排序。
DOI：
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发表时间：
2018
影响因子：
8.6
通讯作者：
S. Teitel
中科院分区：
文献类型：
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作者：
Theodore A. Marschall;Yann;P. Olsson;S. Teitel
数值模拟了双分散、无摩擦、二维球柱体和三维长形椭球体的均匀无热剪切。我们关注的是当非球面参数α→0时粒子的取向排序，并且粒子接近球形。我们发现向列序参数S_{2}在填充分数φ中是非单调的，并且当α→0时，S_{2}在干扰及以上时保持有限。因此，接近球形粒子的方法似乎是奇异的。我们还发现，即使当α→0时，剪切粒子在干扰上方继续旋转，粒子接触优先沿着粒子的最窄宽度。
We numerically simulate the uniform athermal shearing of bidisperse, frictionless, two-dimensional spherocylinders and three-dimensional prolate ellipsoids. We focus on the orientational ordering of particles as an asphericity parameter α→0 and particles approach spherical. We find that the nematic order parameter S_{2} is nonmonotonic in the packing fraction ϕ and that, as α→0, S_{2} stays finite at jamming and above. The approach to spherical particles thus appears to be singular. We also find that sheared particles continue to rotate above jamming and that particle contacts preferentially lie along the narrowest width of the particles, even as α→0.
DOI：
10.1103/physreve.97.012909
发表时间：
2018-01
期刊：
Physical review. E
影响因子：
--
作者：
VanderWerf K;Jin W;Shattuck MD;O'Hern CS
通讯作者：
O'Hern CS