Phys. Rev. E 78, 026408 (2008) [8 pages]
Shear viscosity of strongly coupled Yukawa liquids
Abstract
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Z. Donkó and P. HartmannResearch Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 49, Hungary
Received 10 June 2008; published 19 August 2008
We present molecular-dynamics calculations of the shear viscosity of three-dimensional strongly coupled Yukawa liquids which are frequently used as a model system of complex plasmas. The results obtained using two independent nonequilibrium simulation methods are critically compared with each other and with earlier published data for a wide range of plasma coupling ( ) and screening ( ) parameters. The non-Newtonian behavior of the liquid, manifested as a descrease of the shear viscosity with increasing shear rate (shear thinning), and the validity of the Stokes-Einstein relation at high coupling strength are also demonstrated.
©2008 The American Physical Society
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