Computer simulation of an m-6-8 fluid under shear

A homogeneous shear nonequilibrium molecular dynamics algorithm has been applied to a system of 108 particles interacting with an m-6-8 potential. The viscosity was calculated at three densities corresponding approximately to the triple point, two-thirds melting and critical density. Comparing the results to argon data it appears that three body effects need to be considered at the higher densities. The variation of the viscosity and pressure with shear was noted. The viscosity behavior reinforces previous work with a Lennard-Jones fluid; the pressure behavior has not been reported before.