论文标题
剪切驱动的椭圆形颗粒的剪切驱动的速度和旋转速度
Translational and rotational velocities in shear-driven jamming of ellipsoidal particles
论文作者
论文摘要
我们研究了零温度下椭圆形颗粒的剪切驱动，重点是微观动力学。我们发现，从球形颗粒到椭圆形的变化具有纵横比$α= 1.02 $的变化，给出了微观动力学的急剧变化，其转换速度较低，并且旋转起着新的作用。尽管接触处的速度差异 - 因此，在球体集合中的耗散是由翻译速度主导的，而旋转降低，但相同数量在椭圆形的集合中，而是完全由旋转速度完全统治。还通过检查不同长宽比的效果，我们发现所检查的数量显示了$α\大约1.2 $的峰值或变化，从而证明了低宽高比和高宽高比不同区域之间的交叉。
We study shear-driven jamming of ellipsoidal particles at zero temperature with a focus on the microscopic dynamics. We find that a change from spherical particles to ellipsoids with aspect ratio $α=1.02$ gives dramatic changes of the microscopic dynamics with much lower translational velocities and a new role for the rotations. Whereas the velocity difference at contacts---and thereby the dissipation---in collections of spheres is dominated by the translational velocities and reduced by the rotations, the same quantity is in collections of ellipsoids instead totally dominated by the rotational velocities. By also examining the effect of different aspect ratios we find that the examined quantities show either a peak or a change in slope at $α\approx1.2$, thus giving evidence for a crossover between different regions of low and high aspect ratio.
