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Phys. Rev. E 78, 026408 (2008) [8 pages]

Shear viscosity of strongly coupled Yukawa liquids

Z. Donkó and P. Hartmann
Research 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 (Gamma) and screening (kappa) 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

URL: http://link.aps.org/doi/10.1103/PhysRevE.78.026408
DOI: 10.1103/PhysRevE.78.026408
PACS: 52.27.Gr; 52.25.Fi; 52.27.Lw
  • 52.27.Gr
    Strongly-coupled plasmas
  • 52.25.Fi
    Plasma transport properties
  • 52.27.Lw
    Dusty or complex plasmas; plasma crystals
  • YEAR: 2008
KEYWORDS: electric potential, molecular dynamics method, non-Newtonian flow, plasma flow, plasma kinetic theory, plasma simulation, plasma transport processes, viscosity

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