title: Shear flows and shear viscosity in a two-dimensional Yukawa system (dusty plasma).
abstract: 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 counterpropagating 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(-1), depending on the monolayer's parameters and shear stress applied.
authors.affiliation: Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242, USA. vladimir-nosenko@uiowa.edu
authors.forename: V
authors.initials: V
authors.lastname: Nosenko
authors.forename: J
authors.initials: J
authors.lastname: Goree