Dependence of the frequency dispersion of the bulk viscosity coefficient of solutions of electrolytes on the nature of the decay of relaxing fluxes

The region of the frequency dispersion of the bulk viscosity coefficient η V (ω) of solutions of electrolytes is studied as a function of the nature of the decay of the stress tensor in the momentum and configuration space, the analytical expressions of which are derived by means of kinetic equations. Numerical calculations of η V (ω) for a water solution of NaCl are performed over a wide range of frequencies, temperatures, and densities using a selection of the potentials of intermolecular interaction Φ{in{itab}}(| |) and radial distribution function {itg}{in{itab}}(| |). It is shown that the region of frequency dispersion η V (ω) based on the power law of the decay of the stress tensor is wide (~10 5 Hz), while the region based on the exponential law is narrow (~10 2 Hz).