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arXiv · 1006.3052

Viscoelasticity of 2D liquids quantified in a dusty plasma experiment

Yan Feng·J. Goree·Bin Liu
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Abstract

The viscoelasticity of two-dimensional liquids is quantified in an experiment using a dusty plasma. An experimental method is demonstrated for measuring the wavenumber-dependent viscosity, $η(k)$, which is a quantitative indicator of viscoelasticity. Using an expression generalized here to include friction, $η(k)$ is computed from the transverse current autocorrelation function (TCAF), which is found by tracking random particle motion. The TCAF exhibits an oscillation that is a signature of elastic contributions to viscoelasticity. Simulations of a Yukawa liquid are consistent with the experiment.

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Yan Feng, J. Goree, Bin Liu. 2010-06-15. Viscoelasticity of 2D liquids quantified in a dusty plasma experiment. https://doi.org/10.1103/physrevlett.105.025002

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