I have tried patching and when I do and check the contour to see if it was taken into account before running the simulation, the contour still appears to be 300 K everywhere in the domain and not the patched temperature which is 1000 K. My supervisor does not understand this either; he will send a request to the Ansys Customer Portal but meanwhile if anyone has an idea how to solve this it would be appreciated. I am now trying with the spark ignition... I feel like the issue with patching is related to the FGM model.