Corresponding state-based correlations for the surface tension of saturated fluids

In this paper, we proposed two reduced quantities, based on which we found that the curves of surface tension versus temperature of different saturated fluids can collapse into a single curve. Then a corresponding state-based correlation is proposed and then checked for 66 saturated fluids including simple fluids such as argon, nitrogen, etc., and some refrigerants in the temperature range from the triple point temperature to 0.992 times the critical temperature. By comparing with NIST data, the proposed correlation reproduces NIST data with AAD < 1% for 21 fluids, AAD < 2% for 26 fluids, and AAD < 5% for 46 fluids.