论文标题
在二维中的剪切驱动的Athermal，无摩擦，球状孔悬架的流动：空间结构和相关性
Shear-Driven Flow of Athermal, Frictionless, Spherocylinder Suspensions in Two Dimensions: Spatial Structure and Correlations
论文作者
论文摘要
我们使用数值模拟来研究由固定体积施加的均匀稳态简单剪切和固定有限的应变速率$ \dotγ$驱动的无摩擦，软核二维球形固定器的流动。能量耗散是通过均匀剪切的宿主流体的粘性阻力，从而在具有牛顿流变学的非棕色悬架中为流动提供了简单的模型。我们研究了剪切系统的所得空间结构，并研究速度，粒子密度，列表参数和粒子角速度的计算相关函数。密度，列顺序和角速度的相关性显示出在干扰下和高于干扰的范围。我们将尺寸 - 菌分散粒子系统的系统与大小分散粒子系统进行比较，并争辩说，随着填料的增加，空间顺序的差异如何导致全局列表参数的差异。我们考虑剪切对最初有序配置的效果，并表明在许多情况下，剪切作用是破坏订单的，从而导致从随机初始配置开始时发现的与相同的稳态集合。
We use numerical simulations to study the flow of athermal, frictionless, soft-core two dimensional spherocylinders driven by a uniform steady-state simple shear applied at a fixed volume and a fixed finite strain rate $\dotγ$. Energy dissipation is via a viscous drag with respect to a uniformly sheared host fluid, giving a simple model for flow in a non-Brownian suspension with Newtonian rheology. We study the resulting spatial structure of the sheared system, and compute correlation functions of the velocity, the particle density, the nematic order parameter, and the particle angular velocity. Correlations of density, nematic order, and angular velocity are shown to be short ranged both below and above jamming. We compare a system of size-bidisperse particles with a system of size-monodisperse particles, and argue how differences in spatial order as the packing increases leads to differences in the global nematic order parameter. We consider the effect of shearing on initially well ordered configurations, and show that in many cases the shearing acts to destroy the order, leading to the same steady-state ensemble as found when starting from random initial configurations.
