SHEAR VISCOSITY OF LIQUID-METALS OBTAINED BY NONEQUILIBRIUM MOLECULAR-DYNAMICS

The viscosity of liquid Na and Fe was estimated by using a non-equilib rium molecular dynamics simulation. The effective pair potential used for Na, which is based on the pseudopotential method, reproduces excel lently the temperature dependence of viscosity in liquid Na. For Fe, a n experimentally determined pair potential from the Born-Green equatio n and effective pair potentials based on the hybridized expression of a nearly free electron tight-binding method were used. These potential s were used to calculate the temperature dependence of viscosities of liquid Fe. The results obtained are fair to good, qualitatively and se miquantitatively. For comparison, g(r)s based on the usual molecular d ynamics simulation for these liquid metals were also calculated, and t he results were satisfactory.