New models for tracer diffusion coefficients of hard sphere and real systems: Application to gases, liquids and supercritical fluids

▶ New expression for the tracer diffusion coefficients of the hard sphere fluid. ▶ New equation for tracer diffusivities of real gas, liquid and supercritical systems. ▶ D12 model bases on the HS fluid and on the Rice and Gray approach. ▶ D12 database containing 309 systems and 5341 data points. ▶ Average absolute relative deviations of 4.44% for HS and 4.26% for real systems.