Ignition in premixed combustion simulation.
 

Hi everyone!

I'm currently trying to simulate a premixed NH3-flame (steady-state).

I've imported the GRI 3.0 mechanism. I've selected Species Transport, volumetric reactions, Eddy-Dissipation concept and applied a velocity inlet (1 inlet) where I've specified mole fractions of NH3 and O2 which is at 300 K. Additionally, I've initialized the domain with a temperature of 2500 K in order to ignite the mixture. The temperature contours however show 300 K in the entire domain after simulating, and the NH3 doesn't react.

Before running this simulation, I've used the same settings for methane-air mixture (even without initializing T=2500 K) and this does react.

Do you have any tips on how to solve this problem?

Thank you in advance!