Transport properties of Lennard-Jones fluids: Freezing density scaling along isotherms

It is demonstrated that properly reduced transport coefficients (self-diffusion, shear viscosity, and thermal conductivity) of Lennard-Jones fluids along isotherms exhibit quasi-universal scaling on the density divided by its value at freezing point. Moreover, this closely related to hard-sphere fluids. The Stokes-Einstein relation without hydrodynamic diameter valid in dense fluid regime. lower boundary validity can serve as a practical demarcation line between gas-like liquid-like regimes.