Ansys Employee

When you patched a small amount of products, please also patch high temperatures at reaction zones. 

Can you attach a few screenshots of your Fluent case?

1. Geometry or computational domain.

2. Viscous panel.

3. Species panel.

4. Solution Methods.

5. Solution Controls. Make sure the energy relaxation factor is not lower than 0.95.

In addition, can you try to use the methane-air-2step mixture instead of the 1 step one?