Shear Flows and Shear Viscosity in a Two-Dimensional Yukawa System (Dusty Plasma)

Details Shear Flows and Shear Viscosity in a Two-Dimensional Yukawa System (Dusty Plasma) Shear Flows and Shear Viscosity in a Two-Dimensional Yukawa System (Dusty Plasma)

2005-02-02

arxiv.org/abs/cond-mat/0502064v1

Physical Review Letters, Vol. 93, pp. 155004-1 - 155004-4, 2004

Physics

Condensed Matter

Soft Condensed Matter

all 3 figures are combined in a separate pdf file

Scientific paper

10.1103/PhysRevLett.93.155004

The shear viscosity of a two-dimensional liquid-state dusty plasma was measured experimentally. A monolayer of highly charged polymer microspheres, with a Yukawa interaction, was suspended in a plasma sheath. Two counter-propagating Ar laser beams pushed the particles, causing shear-induced melting of the monolayer and a shear flow in a planar Couette configuration. By fitting the particle velocity profiles in the shear flow to a Navier-Stokes model, the kinematic viscosity was calculated; it was of order 1 mm^2/s, depending on the monolayer's parameters and shear stress applied.

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