Haralson Zach, Goree J
Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA.
Phys Rev Lett. 2017 May 12;118(19):195001. doi: 10.1103/PhysRevLett.118.195001. Epub 2017 May 10.
The Green-Kubo (GK) method is widely used in simulations of strongly coupled plasmas to obtain the viscosity coefficient. However, the method's applicability, which is often taken for granted, has not been tested experimentally. We report an experimental test using a two-dimensional strongly coupled dusty plasma. We find that the GK viscosity is ≈60% larger than the result of a benchmark hydrodynamic method, obtained in the same experiment with the same conditions except for the presence of shear.
格林-库博（GK）方法在强耦合等离子体模拟中被广泛用于获取粘度系数。然而，该方法的适用性虽常被视作理所当然，却尚未经过实验检验。我们报告了一项使用二维强耦合尘埃等离子体的实验测试。我们发现，在相同实验条件下（除了存在剪切力），GK粘度比一种基准流体动力学方法的结果大约大60%。
