Hard Sphere Fluid in Confined Geometries

The density profile of hard sphere fluid confined in two parallel hard walls was studied by using Rosenfeld Density Functional Theory (DFT) and Molecular Dynamics (MD) simulation method. By comparing the results of the two methods, we found that Rosenfeld density functional gives the same results as of MD simulation at larger separations of the walls, when the wall separation becomes smaller, differences of the two methods are showed up. The structures of the density distributions are also discussed.