Static and dynamic shear viscosity of a single-layer complex plasma

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.84.016404· OSTI ID:21611535

Hartmann, Peter ^[1]; Sandor, Mate Csaba; Kovacs, Aniko; Donko, Zoltan ^[1]

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1. Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, P.O.B. 49, H-1525 Budapest (Hungary)

The static and dynamic (complex) shear viscosity of a single-layer dusty plasma is measured by applying, respectively, a stationary and a periodically modulated shear stress, induced by the light pressure of manipulating laser beams. Under static conditions we observe a decrease of the viscosity with increasing shear rate, the so-called shear-thinning behavior. Under oscillating shear both the magnitude and the ratio of the dissipative and elastic contributions to the complex viscosity show strong frequency dependence, as the system changes from viscous to elastic in nature with increasing excitation frequency. Accompanying molecular dynamics simulations explain and support the experimental observations.

• OSTI ID: 21611535
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Vol. 84, Issue 1; Other Information: DOI: 10.1103/PhysRevE.84.016404; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
EXCITATION
FREQUENCY DEPENDENCE
LASERS
MOLECULAR DYNAMICS METHOD
PERIODICITY
PLASMA
STRESSES
VISCOSITY
CALCULATION METHODS
ENERGY-LEVEL TRANSITIONS
SIMULATION
VARIATIONS