Journal article
Frequency-dependent shear viscosity of a liquid two-dimensional dusty plasma
Physical review. E, Statistical, nonlinear, and soft matter physics, Vol.85(6 Pt 2), pp.066402-066402
06/2012
DOI: 10.1103/PhysRevE.85.066402
PMID: 23005224
Abstract
The viscoelasticity of a two-dimensional (2D) liquid stronglycoupled dusty plasma is studied experimentally, without macroscopic shear. Positions and velocities of the dust particles, measured by video microscopy, are used as the inputs to the generalized Green-Kubo relation to obtain the complex viscosity η(ω). The real part of η(ω) (which corresponds to dissipation) diminishes gradually with frequency, while the imaginary part (which corresponds to elasticity) is peaked at a frequency below the 2D dusty plasma frequency. The viscoelastic approximation is found to accurately describe the 2D experimental results for η(ω), yielding the Maxwell relaxation time τ(M)=0.10 s. Results for η(ω) are compared to 2D molecular dynamics Yukawa simulations and to a previous experiment that was performed using an oscillating macroscopic shear.
Details
- Title: Subtitle
- Frequency-dependent shear viscosity of a liquid two-dimensional dusty plasma
- Creators
- Yan Feng - University of IowaJ Goree - University of IowaBin Liu - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Physical review. E, Statistical, nonlinear, and soft matter physics, Vol.85(6 Pt 2), pp.066402-066402
- DOI
- 10.1103/PhysRevE.85.066402
- PMID
- 23005224
- NLM abbreviation
- Phys Rev E Stat Nonlin Soft Matter Phys
- ISSN
- 1539-3755
- eISSN
- 1550-2376
- Publisher
- American Physical Society
- Language
- English
- Date published
- 06/2012
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199721802771
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