The molecular roughness factor from the bulk viscosity coefficient

The translational rotational coupling factor, or roughness factor, introduced by Chandler, has been ewduatcd for two types of nonpolar liquids along the saturation line. For the first type (atomic liquids), a universal correlation has been found. For the second type lalkanesL this quantity presents a sharp increase in the neighborhood of the solid Ilt.id transition Ibr hard spheres, This parameter plays an essential role, since it allows a link to be established between simulation and experimental data.