Thermodynamics of Yukawa systems and sound velocity in dusty plasmas

The simple practical approaches to estimate thermodynamic properties of three-dimensional Yukawa systems across coupling regimes (in fluid and solid phases) are summarized. These approaches demonstrate very good accuracy when compared with the results of direct numerical simulations. To demonstrate possible applications, the sound velocity in a strongly coupled dusty plasma is evaluated by combining the conventional fluid description of multicomponent plasma with the appropriate equation of state of Yukawa fluids. Limitations of the proposed approaches are briefly discussed