Shear-rate dependence of the viscosity of the Lennard-Jones liquid at the triple point

High-precision molecular-dynamics (MD) data are reported for the shear viscosity eta of the Lennard-Jones liquid at its triple point, as a function of the shear rate epsilon for a large system (N = 2048). The Green-Kubo (GK) value eta(epsilon = 0) = 3.24 +/- 0.04 is estimated from a run of 3.6 x 10(6) steps (40 nsec). We find no numerical evidence of a t-3/2 long-time tail for the GK integrand (stress-stress time-correlation function). From our nonequilibrium MD results, obtained both at small and large values of epsilon, a consistent picture emerges that supports an analytical (quadratic at low shear rate) dependence of the viscosity on epsilon.