Trouble in energy residuals

Prasad Dudhgaonkar

I use surface injection model in DPM for injecting evaporable liquid in air in unsteadystate. Untill when the liquid had not come into contact with air, the convergence for each time step (50 micro seconds) was quick (some ten to twenty iterations). Since when the liquid has started entering the high velocity air stream, as seen in the particle tracks, the energy residual has remained stagnated at 1.12e-6 (convergence criteria set is 1e-6) even after 500 iterations.

I will be grateful if somebody enlightens me on this.

Thanks, Prasad