Abstract
We report on molecular dynamics simulations of shear viscosity \ensuremath{\eta} of a dense two-dimensional fluid as a function of the shear rate \ensuremath{\gamma}. We find an analytic dependence of \ensuremath{\eta} on \ensuremath{\gamma}, and do not find any evidence whatsoever of divergence in the Green-Kubo (GK) value that would be caused by the well-known long-time tail for the shear-stress autocorrelation function, as predicted by the mode-coupling theory. In accordance with the linear response theory, the GK value of \ensuremath{\eta} agrees remarkably well with nonequilibrium values at small shear rates. (c) 1995 The American Physical Society
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