Finite-size Scaling Study of Shear Viscosity Anomaly at Liquid-Liquid Criticality

Abstract

We study equilibrium dynamics of a symmetrical binary Lennard-Jones fluid mixture near its consolute criticality. Molecular dynamics simulation results for shear viscosity, $\eta$, from microcanonical ensemble are compared with those from canonical ensemble with various thermostats. It is observed that Nosé-Hoover thermostat is a good candidate for this purpose and so, is adopted for the quantification of critical singularity of $\eta$, to avoid temperature fluctuation (or even drift) that is often encountered in microcanonical simulations. Via finite-size scaling analysis of our simulation data, thus obtained, we have been able to quantify even the weakest anomaly, of all transport properties, that shear viscosity exhibits and confirm the corresponding theoretical prediction.

6 pages, 6 figures

References in corpus (3)

• Static and Dynamic Critical Behavior of a Symmetrical Binary Fluid: A Computer Simulation
• Critical Dynamics in a Binary Fluid: Simulations and Finite-size Scaling
• Simulation of Transport around the Coexistence Region of a Binary Fluid

Cited by in corpus (5)

• Structure and dynamics of binary liquid mixtures near their continuous demixing transitions
• Kinetics of Fluid Phase Separation
• Finite-size scaling study of dynamic critical phenomena in a vapor-liquid transition
• Study of Critical Dynamics in Fluid via Molecular Dynamics in Canonical Ensemble
• Critical surface adsorption of confined binary liquids with locally conserved mass and composition