In tutorial guide of Ansys fluent 17, chapter 16, a non-premixed air and methane combustion is modeled. The inlet and wall temperature are all set as 300K which is room temperature. I am wondering why ignition is not need in this case.
normally people would patch a high partial temperature or give wall a high enough temperature to ignite the mixture. However why in this case, ignition is not needed? Or is it because eddy dissipation model is used in this case?