Modeling coal combustion with DPM

Amit Katiyar

Dear Experts, We are modeling coal combustion in a boiler using DPM. We are observing that at some point of iteration, all the convergence criteria are about to be satisfied, but If the simulation is run for some more iterations, the monitored temperatures and other variables start fluctuating and this fluctuations do not stop even for thousands of iterations. This does not allow us to freeze the runs. We are using second order discretization, k-epsilon model, and DO radiation model. Please suggest me your valuable suggestions.

Thanking you, With regards

Amit Katiysr