Viscosity calculated in simulations of strongly-coupled dusty plasmas with gas friction

Details Viscosity calculated in simulations of strongly-coupled dusty plasmas with gas friction Viscosity calculated in simulations of strongly-coupled dusty plasmas with gas friction

2011-04-18

arxiv.org/abs/1104.3546v1

Physics of Plasmas, Vol. 18, 057301 (2011)

Physics

Plasma Physics

6 pages, 3 figures, Physics of Plasmas invited paper

Scientific paper

10.1063/1.3560584

A two-dimensional strongly-coupled dusty plasma is modeled using Langevin and frictionless molecular dynamical simulations. The static viscosity $\eta$ and the wave-number-dependent viscosity $\eta(k)$ are calculated from the microscopic shear in the random motion of particles. A recently developed method of calculating the wave-number-dependent viscosity $\eta(k)$ is validated by comparing the results of $\eta(k)$ from the two simulations. It is also verified that the Green-Kubo relation can still yield an accurate measure of the static viscosity $\eta$ in the presence of a modest level of friction as in dusty plasma experiments.

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