Surya Deb
Ansys Employee
Hello,
For a 2 way coupled simulation, there will always be source terms on the DPM side which will feed into the momentum and energy equations.
So these source terms make sure that the flow and particles are tightly coupled to one another.
If the particles don't influence the flow, then these source terms are generally not needed and so "Coupled" solution is not needed.
Regards SD