# ThermophysicalProperties in XiFoamXoodles

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 June 27, 2008, 08:45 Dear Foamers I'm currently #1 New Member   Joakim Möller Join Date: Mar 2009 Posts: 26 Rep Power: 10 Dear Foamers I'm currently trying to model a methane flame in XiFoam, CH4+2O2 -> CO2+2H2O hence using the inhomogeneousMixture model.Trough an inlet, the fuel: 0.91 Ch4+ 0.09 N2 enters into the domain, filled with the oxidant: 0.767 N2 + 0.223 O2 My question concern the entries in the file thermophysicalProperties. I have been told that the entries in the file are 1 - mole ( 2 - molecular weight. 3 - low temperature range nasa polynomen 4 - high temperature range nasa poly. 5 - split temperaturen nasa poly 6-12 high temp coefficients nasa 13-19 low temp coefficients nasa 20-21 viscosity coeffs. (C1 and S) Sutherlands law. Thx, Niklas Nordin! My questions are 1) What is the molevalue for the, fuel and oxidant, burntproduct. In the pitzDaily case the are 1,1 and 25.8095, (propane burning case) 2) How do I calculate the average cp-entries for the burntproduct. Is it simply cp_average=(X_CO2=0.5)*cp_CO2+(X_H2O=0.5)*cp_H2O Best regards /Joakim How do I calculate the entries for the

 April 24, 2010, 12:32 thermoPhysicalProperties of XiFoam #2 New Member   Ramesh Join Date: Aug 2009 Posts: 4 Rep Power: 10 Hello Joakim, Did you find what are thses reactants,products & burntProducts in the XiFoam test case. I am working on turbulent premixed flames, I want use methane-air mixture or other hydrocarbon-air mixture to use weller's model, I should know what are these reactants,products & burntProducts in thermoPhysicalProperties file of the XiFoam test case, Thanks in Advance Ramesh rameshbvb@gmail.com

 October 25, 2010, 15:41 #3 New Member   Ricardo Flatschart Join Date: Apr 2010 Posts: 12 Rep Power: 9 You can use adiabaticFlameT, which is in \$FOAM_APP/utilities/thermophysical directory.

February 1, 2017, 19:16
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Shuai Yuan
Join Date: Nov 2016
Posts: 26
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Quote:
 Originally Posted by joakim Dear Foamers I'm currently trying to model a methane flame in XiFoam, CH4+2O2 -> CO2+2H2O hence using the inhomogeneousMixture model.Trough an inlet, the fuel: 0.91 Ch4+ 0.09 N2 enters into the domain, filled with the oxidant: 0.767 N2 + 0.223 O2 My question concern the entries in the file thermophysicalProperties. I have been told that the entries in the file are 1 - mole ( 2 - molecular weight. 3 - low temperature range nasa polynomen 4 - high temperature range nasa poly. 5 - split temperaturen nasa poly 6-12 high temp coefficients nasa 13-19 low temp coefficients nasa 20-21 viscosity coeffs. (C1 and S) Sutherlands law. Thx, Niklas Nordin! My questions are 1) What is the molevalue for the, fuel and oxidant, burntproduct. In the pitzDaily case the are 1,1 and 25.8095, (propane burning case) 2) How do I calculate the average cp-entries for the burntproduct. Is it simply cp_average=(X_CO2=0.5)*cp_CO2+(X_H2O=0.5)*cp_H2O Best regards /Joakim How do I calculate the entries for the
Hello, have you find out the explanation for fuel, reactant, oxidant, product and burnt product?

 February 1, 2017, 19:44 #5 Senior Member   Oskar Join Date: Nov 2015 Location: Poland Posts: 109 Rep Power: 4 Check out this topic: low/highCpCoeffs and np.polyfit. How to change fuel?

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