论文标题
二维偶极系统的剪切粘度
Shear Viscosity in Two-Dimensional Dipole Systems
论文作者
论文摘要
提出了经典二维偶极系统中建模剪切流的结果。我们使用非平衡分子动力学的方法来计算各种剪切速率的粘度。剪切粘度的系数以低剪切速率的极限给出，从弱相关的气态到结晶点附近的强烈非理想的液态状态。在耦合参数的较小值下报道了2D偶极系统中剪切变薄的作用。此外，根据颗粒间相关程度，由于存在筛选介质，偶极系统可能会变得越来越多地粘稠。在非平衡分子动力学方法的框架内讨论了最佳仿真参数，以确定二维偶极系统的剪切粘度。此外，我们提出了一个简单的拟合曲线，该曲线为裸露的偶极 - 偶极相互作用和筛选的偶极 - 偶极相互作用提供了通用缩放定律。
The results of modeling shear flows in classical two-dimensional dipole systems are presented. We used the method of non-equilibrium molecular dynamics to calculate the viscosity at various shear rates. The coefficients of shear viscosity are given in the limit of low shear rates for various regimes of interparticle correlation from a weakly correlated gaseous state to a strongly non-ideal liquid state near the crystallization point. The effect of shear thinning in 2D dipole systems is reported at small values of the coupling parameter. In addition, it is shown that dipole systems can become both less and more viscous due to the presence of a screening medium, depending on the degree of interparticle correlation. The optimal simulation parameters are discussed within the framework of the method of nonequilibrium molecular dynamics for determining the shear viscosity of two-dimensional dipole systems. Moreover, we present a simple fitting curve which provides universal scaling law for both bare dipole-dipole interaction and screened dipole-dipole interaction.
