CoolProp

The surface tension correlation class uses correlations for the surface tension that are all of the form.
\[ \sigma = \sum_i a_i\left(1\frac{T}{\tilde T_c}\right)^{n_i} \]
where \( \tilde T_c \) is the critical temperature used for the correlation which is almost always equal to the critical temperature of the equation of state. Result for surface tension is in N/m
#include <Ancillaries.h>
Public Member Functions  
SurfaceTensionCorrelation (rapidjson::Value &json_code)  
CoolPropDbl  evaluate (CoolPropDbl T) 
Actually evaluate the surface tension equation.  
Public Attributes  
std::vector< CoolPropDbl >  a 
the leading coefficients a_i  
std::vector< CoolPropDbl >  n 
the powers n_i  
std::vector< CoolPropDbl >  s 
a summation buffer  
CoolPropDbl  Tc 
critical temperature in K  
std::size_t  N 
number of a_i, n_i pairs  
std::string  BibTeX 
The BiBTeX key for the surface tension curve in use.  