Molecular dynamics calculations of the ratio D DE (where D was the self-diffusion coefficient and DE was the Enskog dense gas diffusion coefficient) for a dense hard-sphere fluid, done previously for systems of 128, 250 and 432 particles, were extended to systems of 1024, 2000 and 4394 particles for a density corresponding to V V0 = 2.0 (where V0 was the volume of close-packed hard spheres). The results confirmed that D DE had only a very slight number dependence for systems of more than 250 particles.

On the Number Dependence of Hard-Spheres Diffusion Coefficients from Molecular Dynamics Simulations. Easteal, A.J., Woolf, L.A., Jolly, D.L.: Physica A, 1984, 127[1-2], 344-6