Periodically sheared 2D Yukawa systems

Kovács, Anikó Zsuzsa and Hartmann, Peter and Donkó, Zoltán (2015) Periodically sheared 2D Yukawa systems. Physics of Plasmas, 22 (10). pp. 1-7. ISSN 1070-664X

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Abstract

We present non-equilibrium molecular dynamics simulation studies on the dynamic (complex) shear viscosity of a 2D Yukawa system. We have identified a non-monotonic frequency depend- ence of the viscosity at high frequencies and shear rates, an energy absorption maximum (local resonance) at the Einstein frequency of the system at medium shear rates, an enhanced col- lective wave activity, when the excitation is near the plateau frequency of the longitudinal wave dispersion, and the emergence of significant configurational anisotropy at small frequencies and high shear rates.

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