Hello,nThank you. I have generated the flamelet library for Ethylene/air combustion by importing mechanism and thermo file. nBut I need help for defining Fuel. I found that in Oxidizer section there will be only mole fraction of oxygen and nitrogen. nBut to define in Fuel section, I am not getting how to define mole fraction of Ethylene. First, I defined mole fraction of C2H4 to 1 but my results are too far compared to experimental results. nAlso I balanced the reaction as C2H4 + 3O2 = 2CO2 + 2H2O. nFor the complete combustion what will be the reaction? From the above reaction, I calculated the mole fraction of C2H4 is 0.125. But the total mole in Fuel will be 1. I am not getting what are the mole fractions of species that I should add.nSincerely,nSantun