What question did this study set out to answer?

To determine the shear viscosity and strain-rate dependence of liquid argon using nonequilibrium molecular dynamics simulations with a Lennard-Jones potential.

July 23, 1973Physical Review Letters

Argon Shear Viscosity via a Lennard-Jones Potential with Equilibrium and Nonequilibrium Molecular Dynamics

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Authors

WAW. T. AshurstSandia National Laboratories California WHWilliam G. HooverRubber Research Institute

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Implication

Molecular dynamics simulation reveals strain-rate dependence of shear viscosity in liquid argon, indicating agreement with equilibrium Green-Kubo predictions and experimental measurements.

Key Points

To determine the shear viscosity and strain-rate dependence of liquid argon using nonequilibrium molecular dynamics simulations with a Lennard-Jones potential.
Simulated liquid argon modeled via a Lennard-Jones potential using nonequilibrium molecular dynamics across multiple strain rates.
Computed viscosity values near the triple point and at elevated temperatures along the saturated vapor pressure line.
Extrapolated zero-gradient shear viscosity to compare with equilibrium Green-Kubo calculations and experimental liquid argon data.
Near the triple point, apparent viscosity decreased with increasing strain rate, demonstrating shear-thinning behavior.
Extrapolated zero-gradient viscosity aligned with equilibrium Green-Kubo viscosity values calculated by Levesque, Verlet, and Kurkijarvi.
At higher temperatures along the saturated vapor pressure line, viscosity was insensitive to strain rate and matched experimental argon data.

Cite This Study

Ashurst et al. (1973) studied this question.

synapsesocial.com/papers/6a6f4e9f78a11c550e08ff89 https://doi.org/10.1103/physrevlett.31.206

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Implication

Molecular dynamics simulation reveals strain-rate dependence of shear viscosity in liquid argon, indicating agreement with equilibrium Green-Kubo predictions and experimental measurements.

Argon Shear Viscosity via a Lennard-Jones Potential with Equilibrium and Nonequilibrium Molecular Dynamics

Discussion

Member takes

Implication

Key Points

Cite This Study

Argon Shear Viscosity via a Lennard-Jones Potential with Equilibrium and Nonequilibrium Molecular Dynamics

Discussion

Member takes

Implication

Key Points

Cite This Study

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