Surface Tension is tagged SurfaceTension. The property is tabulated against temperature or reduced temperature and used in the vaporization model of liquid fuels. It is a 5-coefficient correlation with units of N/m. The first number in the tag is an integer indicating the type of the correlation and the next five numbers are the five correlation coefficients A to E (D and E are usually 0).

The surface tension calculation uses two types of correlations (mutually exclusive). The type of correlation is determined based on the first ID tag of either 1 or 2. The Type 1 correlation (Equation 6 ) is most commonly used. However, a few components, such as methanol and ethanol, use the Type 2 correlation ( Equation 7).

(6)

where temperature is or a reduced temperature, .

(7)