Determination of viscosity in shear-induced melting two-dimensional dusty plasmas using Green-Kubo relation,Physical Review E

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Determination of viscosity in shear-induced melting two-dimensional dusty plasmas using Green-Kubo relation
Physical Review E ( IF 2.2 ) Pub Date : 2021-01-25 , DOI: 10.1103/physreve.103.013211
Dong Huang ₁ , Shaoyu Lu ₁ , Yan Feng ₁

Affiliation

Langevin dynamical simulations of shear-induced melting two-dimensional (2D) dusty plasmas are performed to study the determination of the shear viscosity of this system. It is found that the viscosity calculated from the Green-Kubo relation, after removing the drift motion, well agrees with the viscosity definition, i.e., the ratio of the shear stress to the shear rate in the sheared region, even the shear rate is magnified ten times higher than that in experiments. The behaviors of shear stress and its autocorrelation function of shear-induced melting 2D dusty plasmas are compared with those of uniform liquids at the same temperatures, leading to the conclusion that the Green-Kubo relation is still applicable to determine the viscosity for shear-induced melting dusty plasmas.

中文翻译：

使用 Green-Kubo 关系测定剪切诱导熔融二维尘埃等离子体的粘度

进行剪切诱导熔化二维 (2D) 尘埃等离子体的朗之万动力学模拟，以研究该系统剪切粘度的测定。发现由Green-Kubo关系计算得到的黏度，在去除漂移运动后，与黏度定义，即剪切区域内的剪切应力与剪切速率的比值，即使放大了剪切速率也非常吻合。比实验高出十倍。将剪切诱导熔融二维尘埃等离子体的剪切应力行为及其自相关函数与相同温度下均匀液体的剪切应力行为及其自相关函数进行了比较，得出的结论是 Green-Kubo 关系仍然适用于确定剪切诱导的粘度熔化尘土飞扬的等离子体。

更新日期：2021-01-26

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