Universal correlation of self-diffusion coefficients of model and real fluids based on residual entropy scaling law

► The self-diffusion coefficient (D11) is studied by entropy scaling law's approach. ► One shows that well know entropy scaling laws of the literature are not universal. ► One shows that D11 depends upon both residual entropy & chain length parameter. ► Universal D11 correlation is proposed for model & real fluids (9.13%, 1724 points). ► A simple equation is proposed specifically for HS and LJ fluids (4.61%, 659 points).