Divergence in Two phase flow.
 

I am trying to solve a two phase flow with air as the primary phase and inert particles as secondary dispersed phase using Fluent DPM model. The dipersed phase is well below 10% volume fraction required for DPM simulation.
I am not able to converge the solution. I am getting the following error:
temperature limited to 5000 k in #no. of cells. After certain no. of iterations the solutions diverges and blows up. I have used CFL =.1 and DPM urf=.01, but still the solution diverges after initial iterations :confused:
Though I have noticed that if I switch off turbulence model ( k-w SST in this case) then the model reaches convergence. Its a steady state simulation.
Please help me regarding convergence !!