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EnglishWe report on molecular dynamics simulations of shear viscosity eta of a dense two-dimensional fluid as a function of the shear rate gamma. We find an analytic dependence of eta on gamma, and do not find any evidence whatsoever of divergence in the Green-Kubo (GK) value that would be caused by the well-known longtime 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 eta agrees remarkably well with nonequilibrium values at small shear rates.
http://hdl.handle.net/11573/33567| Titolo: | Linear and nonlinear viscous flow in two-dimensional fluids |
| Autori interni: | CICCOTTI, Giovanni |
| Data di pubblicazione: | 1995 |
| Rivista: | PHYSICAL REVIEW E |
| Abstract: | We report on molecular dynamics simulations of shear viscosity eta of a dense two-dimensional fluid as a function of the shear rate gamma. We find an analytic dependence of eta on gamma, and do not find any evidence whatsoever of divergence in the Green-Kubo (GK) value that would be caused by the well-known longtime 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 eta agrees remarkably well with nonequilibrium values at small shear rates. |
| Handle: | http://hdl.handle.net/11573/33567 |
| Appare nelle tipologie: | 01.a Pubblicazione su Rivista |
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