Hi everybody.I have a question in using unsteady Particle with transient flow.if it is nessesary to solve the Continuous phase and then Coupled the calculations please tell me.

hi, i think you need to couple the solution as coupling ensures that you have mass transfer from your discrete phase to your continuous phase. You're are using the separated flow model approach and so your continuous phase is solved in the Eulerian framework and the discrete phase is solved using the Lagrangian formulation.

Check also the Fluent Manual for more info.

James