Contents of the zip file

The file helium_viscosity_check_points.py does not require any additional software to run and can be used to assist in coding the correlation.
The file helium_viscosity_uncertainty.py calculates the viscosity and the associated uncertainty (at k=2) and requires the NIST REFPROP program https://www.nist.gov/srd/refprop
and wrapper https://github.com/usnistgov/REFPROP-wrappers/tree/master/wrappers/python and also the text file abinitio.values.txt
The file HELIUM.FLD is designed to be used with the REFPROP program and should be used to replace your existing file.
Four text files are included that give the values of t,p (K,MPa) of the boundary of various uncertainty levels (at k=2).
