Prediction of surface tension in metallic and ionic melts in thermophysical database system

A so-called excess surface tension model in a thermophysical database of IDMSKM system is described in this paper. The functional expression for excess Gibbs energy of mixing with mole fraction for binary solutions by Redlich & Kister has been applied to correlate excess surface tension defined in this paper with mole fraction for the same, therefore, the surface tension could be represented in a quaternary polynomial function of mole fraction. The predicted surface tension values by this model demonstrate a reasonable accuracy in binary metallic as well as ionic systems. The model exhibits a better generality than the previous ones for surface tension evaluations, hence its application could be expected to expand.