Minima of shear viscosity and thermal conductivity coefficients of classical fluids

The shear viscosity and thermal conductivity coefficients of various liquids exhibit minima along certain trajectories on the phase diagram. These arise due to crossover between momentum energy transport mechanisms in gas-like liquid-like regimes. We demonstrate that magnitudes are quasi-universal appropriately reduced units, especially for coefficients. results presented support this observation concern properties three simple model systems with different pairwise interaction potentials (hard spheres, Lennard–Jones, Coulomb) as well seven important real atomic molecular (Ne, Ar, Kr, Xe, CH4, CO2, N2). represent useful reference points fluid properties.