problem in incomplete nonpremixed combustion

muro

Hello good evening,

I've got problem on simulation of propane/air incomplete non-premixed combustion. What I found that the mass fraction of CO is not reasonable which is the mass fraction value is around 1x 10e-20 to 1x 10e-23. I've used the finite-rate/eddy-dissipation turbulence-chemistry interaction model to calculate the reaction rates. Can you suggest to me the suitable way or model that can simulate the propane/air incomplete combustion by giving reasonable answers? Your help is really appreciated.

Thank you very much.