STRAIN-RATE DEPENDENT PROPERTIES OF A SIMPLE FLUID

The strain rate dependence of a range of rheological properties of the Weeks-Chandler-Andersen fluid at the Lennard-Jones triple point is in vestigated by non-equilibrium molecular dynamics simulation. A moderat ely large system size and very long simulation times have yielded data in the very low strain rate regime with relatively high statistical p recision. The strain rate variation of the shear viscosity cannot be a ccounted for by a single square-root functional form. Some functional forms consistent with the data are discussed.