Does anyone have any experince of using the premixed turbulent combustion model in Fluent 5? I am trying to model the combustion of methane and air, however, the mixture burns as soon as it enters the domain. To slow down the progress variable (c) I have been reducing the critical rate of strain to increase the effect of flame stretch. This method has the desired effect, however, the solution becomes unstable and fails. Any advise!!!!!

I think that modeling of premixed turbulent combustion is still challenging. So, I still use Eddy-Break-Up model for several cases, sometimes by calibrating model constants.

Sincerely, Jinwook

I totally agree with you. I have been using the finte rate / eddy dissipation model with some degree of success, however, I wanted to try a different approach to see what would happen.

Regards Tom