Viscoelastic response of Yukawa liquids

Z. Donkó, J. Goree, P. Hartmann

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The viscoelastic properties of strongly coupled Yukawa liquids are characterized by computing the complex shear viscosity η (ω). This is done using three methods of molecular-dynamics simulation: equilibrium, nonequilibrium, and Langevin dynamics, all with a mutually repulsive Yukawa interparticle potential. A change from viscous to elastic response is observed with increasing frequency, as well as a decrease of the magnitude of the viscosity with increasing frequency. The Langevin simulation reveals that the dependence of the complex viscosity on the friction has a different character for hot and cool liquids. At ω=0, we find that as friction increases, the viscosity diminishes at high temperature but increases at low temperature. In addition to finding its frequency dependence, we also derive the wave-number (length-scale) dependence of the shear viscosity.

Original languageEnglish
Article number056404
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume81
Issue number5
DOIs
Publication statusPublished - May 14 2010

Fingerprint

Viscosity
Shear Viscosity
Liquid
viscosity
Friction
liquids
Langevin Dynamics
Nonequilibrium Dynamics
Length Scale
friction
Molecular Dynamics Simulation
shear
Yukawa potential
Decrease
Computing
simulation
molecular dynamics
Simulation
Character

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

Cite this

Viscoelastic response of Yukawa liquids. / Donkó, Z.; Goree, J.; Hartmann, P.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 81, No. 5, 056404, 14.05.2010.

Research output: Contribution to journalArticle

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