Overestimation of Viscosity by the Green-Kubo Method in a Dusty Plasma Experiment

Zach Haralson and J. Goree
Phys. Rev. Lett. 118, 195001 – Published 10 May 2017
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Abstract

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.

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  • Received 6 December 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.195001

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Plasma PhysicsStatistical Physics & ThermodynamicsFluid Dynamics

Authors & Affiliations

Zach Haralson* and J. Goree

  • Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA

  • *zachary-haralson@uiowa.edu

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Issue

Vol. 118, Iss. 19 — 12 May 2017

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