Not for the release SUNFLUIDH_EDU .
This data setup is only used in the full version of sunfluidh for the simulation of multi-species gas flows under low-Mach number hypothesis. Otherwise it can be omitted.
It is used to define every thermo-chemical properties of species to estimate physical properties of gas mixture such as heat capacity, thermal conductivity, transport coefficients of diffusion, ….
Data could be used or not, this depends on the context.
An example on a Helium/Air mixture is given here for helping the user about this data set.
&Species_Properties Species_Name = "He" , Species_molecular_Mass= 4.0D-03 , Reference_Molecular_Heat_Capacity = 5.193D+03 , Schmidt_Number = 1.0 , Electric_Charge = 0 , Lennard_Jones_Diameter = 2.576D-10 , Lennard_Jones_Potential= 10.20 , Thermochemical_Properties_Coefficients(1:7,1) = 2.50000000E+00 0.00000000E-00 0.00000000E-00 0.00000000E-00 0.00000000E-00 2.85315086E+05 1.62166556E+00 , Thermochemical_Properties_Coefficients(1:7,2) = 2.50000000E+00 0.00000000E-00 0.00000000E-00 0.00000000E-00 0.00000000E-00 2.85315086E+05 1.62166556E+00 / &Species_Properties Species_Name = "Air" , Species_molecular_Mass= 2.9D-02 , Reference_Molecular_Heat_Capacity = 1.048D+03 , Schmidt_Number = 1.0 , Electric_Charge = 0 , Lennard_Jones_Diameter = 3.711D-10 , Lennard_Jones_Potential= 97.60 , Thermochemical_Properties_Coefficients(1:7,1) = 0.03298677E+02 0.14082404E-02 -0.03963222E-04 0.05641515E-07 -0.02444854E-10 -0.10208999E+04 0.03950372E+02 , Thermochemical_Properties_Coefficients(1:7,2) = 0.02926640E+02 0.14879768E-02 -0.05684760E-05 0.10097038E-09 -0.06753351E-13 -0.09227977E+04 0.05980528E+02 , End_of_Data_Block= .true./