Abstract: Equilibrium molecular dynamics simulations have been used to calculate the shear viscosity of fluid argon both in macrovolume system and in porous media at different temperatures, densities and pore widths. Simultaneously, based on the Chapman-Enskog(CE) theory for the transport properties of hard-sphere fluids and Heyes relationships which extend the CE theory to Lennard-Jones fluids, two correlation models which can describe the viscosity of simple fluid in porous media are proposed as a function of the reduced temperature, density and pore width. The validity of the models is evaluated by comparing the calculated viscosity to the simulation data.

Key words: Micro pores, Viscosity, Molecular dynamics, Correlation models