Reply To: Tracking large particles in turbulent flow

[Rob]

You've found the two "normal" Fluent options, and rightly concluded that neither is ideal. MPM has other limitations so I'd avoid that in most cases. 

Part of your problem is that the particles will interact with the flow in an interesting way, and will effect the turbulence and more general flow field. For one, they'll be larger than the flow boundary layer. The Rocky semi-resolved model coupled with Fluent is likely the best option but adding in the remeshing etc is going to make it an expensive calculation.