A SIMPLE-MODEL FOR THE CALCULATION OF SELF-DIFFUSION

We propose a simple model for the calculation of the self-diffusion coefficient of classical fluids. The model is based on the idea of separating the configurational space of a fluid system into a vibrational part and a structural part. There is no adjustable parameter in the model and the only input required is the interatomic potential. Using the model we have calculated the self-diffusion coefficients of the Lennard-Jones fluid, the one component plasma and the Yukawa fluid. The predicted results have been compared with recent computer simulation data and a good agreement has been achieved.