Further study on the relationships of the surface tension coefficient of water and the temperature

摘要

For convenient test comparisons and engineering applications, the relationships between the surface tension coefficient of water and the temperature were analyzed by using the linear fit and the nonlinear quadratic fit based on a number of experimental data from literatures. The new relationships of the experimental values and the temperatures have been built. The results show that the percentage of the data collected is 77.11% in 0-30°C. The deviations of the calculated values of the linear fit and the nonlinear quadratic fit relationships and the recognized values are small and they are respectively in [-0.465, 0.365] mN/m and [0.128, 0.180] mN/m. The calculated values of the linear fit and nonlinear quadratic fit relationships are highly consistent with the recognized values. Moreover, the accuracy of the nonlinear quadratic fit equation is higher than that of the linear fit equation. In addition, 22.89% of the data collected are in 30-80°C. The deviations between the calculated values and the recognized values are relatively large and they are respectively in [0.365, 0.692] mN/m and [0.170, 1.180] mN/m.