The SAFT-VR Morse equation of state for liquid alkali metals

In this work, the thermo-physical properties of liquid alkali metals using the SAFT-VR Morse equation of state (EoS) have been estimated. The saturated liquid density, compressed liquid density, viscosity, and speed of sound of pure liquid alkali metals have been calculated using the SAFT-VR Morse EoS. The model capability has been evaluated in mixed liquid alkali metals systems. In this regard, the densities of K-Cs, Na-K, and Na-K-Cs systems have been predicted. The modified Enskog equation has been combined with the SAFT-VR Morse model to correlate the viscosity of liquid metals. The average error (ARD%) between model estimation and experimental data for saturated liquid density, compressed liquid density, viscosity, and speed of sound have been obtained 1.61, 4.4, 3.15, and 35.2, respectively. As well, the average errors of calculated binary and ternary liquid density of K-Cs, Na-K, and Na-K-Cs systems have been obtained, 0.8, 0.65, and 4.89 respectively. The results indicated that the SAFT-VR Mors EoS can estimate the thermo-physical properties of liquid alkali metals up to high pressure and temperature, accurately.

Automated summary

The thermo-physical properties of liquid alkali metals were estimated using the SAFT-VR Morse equation of state. The calculated properties include saturated liquid density, compressed liquid density, viscosity, and speed of sound. The SAFT-VR Morse EoS was found to accurately estimate the properties of liquid alkali metals at high pressure and temperature.