Online Numerical Tools, Codes and Executables
Estimation of Mixture Thermo-physical Properties as a Function of Temperature

Description:   

The tool is designed to estimate the key thermophysical properties like Specific heat (at constant pressure and temperature), Enthalpy, Entropy, Polytropic index etc as a function of temperature at ambient pressure for a mixture of gases. The specific heat, enthalpy and entropy are estimated on both mole and mass specific basis. The estimation is based on seven coefficient NASA polynomials. To being with, the 53 species for which the coefficients are listed in the GRIMech 3.0 database (available at http://combustion.berkeley.edu/gri-mech/) are included and it is planned to extend the database to additional species. Currently, if all the species are considered in the mixture, the coefficient validity regime would be between 300 K and 3500 K. The supported species are listed in the following table.

O2 N2 CO2 CH4 H2 CO H2O NO NO2 N2O
O H OH HO2 H2O2 CH C CH2 CH3 HCO
CH2O CH2OH CH3O CH3OH C2H C2H2 C2H3 C2H4 C2H5 C2H6
CH2CO HCCO HCCOH H2CN HCN HNO N NNH NH NH2
NH3 HCNO HOCN HNCO NCO CN HCNN AR C3H8 C3H7
CH3CHO CH2CHO CH2(S)

Theory:   

Yet to be included

Features / How to use:   

  • Enter the mole fraction of the gases in %. For convenience, the species are segregated as major and minor species and together the mole fraction should sum to 100%
  • The sum of mole fraction entered can be verified using the "Verify Summation" button.
  • If required the "Normalize" button may be used to normalize the entered values if the mole fraction does not add to 100%. This option should be used with caution.
  • As a test case, the standard air composition can be loaded using the "Reset to Air Composition" option.
  • Once the mole fraction for the mixture species is entered and verified, enter the mixture temperature between 300K and 3500K.
  • Click the "Evaluate" button to estimate the mixture properties

First upload date:   

12th Jan-2019

Most recent update:   

Extension:   

Extension of the specie database is possible. If any additional species are required to be introduced as a mixture component, please send a mail with the request to architect@thermofluidscitech.com and I will be glad to introduce the specie after due review.


Enter the fraction values in percentage (%) and selection the appropriate conversion option
 
Major Species

 
Minor Species

        
Enter the desired mixture temperature and submit
Mixture thermo-physical properties