# Shear viscosity of pseudo hard-spheres

## TL;DR

This study uses molecular dynamics simulations to analyze the shear viscosity of pseudo hard-sphere fluids, demonstrating that the generalized WCA potential accurately reproduces the shear viscosity of true hard spheres.

## Contribution

The paper introduces a simulation approach for pseudo hard-spheres using a generalized WCA potential and validates its accuracy in reproducing hard-sphere shear viscosity.

## Key findings

- Good agreement with Carnahan-Starling equation
- Accurate reproduction of shear viscosity
- Validation against previous HS data

## Abstract

We present molecular dynamics simulations of pseudo hard sphere fluid (generalized WCA potential with exponents (50, 49) proposed by Jover et al. J. Chem. Phys 137, (2012)) using GROMACS package. The equation of state and radial distribution functions at contact are obtained from simulations and compared to the available theory of true hard spheres (HS) and available data on pseudo hard spheres. The comparison shows agreements with data by Jover et al. and the Carnahan-Starling equation of HS. The shear viscosity is obtained from the simulations and compared to the Enskog expression and previous HS simulations. It is demonstrated that the PHS potential reproduces the HS shear viscosity accurately.