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-   -   N2 mass fraction increase during the combustion (http://www.cfd-online.com/Forums/cfx/91569-n2-mass-fraction-increase-during-combustion.html)

Gabriel_ August 15, 2011 17:20

N2 mass fraction increase during the combustion
 
Hi friends.
I am simulating a spark-ignition engine with the flamelets libraries for hydrogen and methane. I complete the both simulations, but the methane's simulation shows an increase in the mass fraction of N2 when the spark is released. I tried different models of NO formation, increase the time step, refine the mesh, but the same problem persists.
I would like to know if any one already had this kind of problem and if anyone has some idea about what is happening.

Thanks for your attention!


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