Surface tension correlation for binary HFC mixtures

Surface tension is a basic thermophysical property which influences the heat transfer and fluid bubbles attached to the surface. Surface tension data for hydrofluorocarbon (HFC) mixtures, which are considered as refrigerant alternatives, is necessary for proper design of air conditioners and refrigeration equipment. The update available experimental data was used to develop correlations for the surface tension of HFC mixtures. The correlations are also able to represent the surface tension of corresponding pure refrigerants. The correlations were compared with correlations of literatures. These correlations accurately represent the experimental data over a wide temperature range with accuracy that can satisfy the requirements of engineering applications.