DPM; particle seeded / deleted by UDF

Laika

Dear Fluent Users,

To model what I need to model, I need to develop a UDF that generates particles in a simulation using Discrete Phase Model. It should be able to delete them as well.

Under certain conditions in my transient simulation, there will be particles in my flow, that actually behave like particles. Like a kind of condensation cores jumping into existance when the conditions are right, and then acting as a species source (either positive or negative) for the gaseous phase. When the conditions are right, these particles can dissapear as well.

So part of the UDF should be able to bring particles into existance. But I don't see a possibility to do this. How can I create a particle for the DPM in the middle of the flow field at a priory unknown locations.

One idea I have, but I don't know whether this will work: can I create a file-injection, and have an execute_at_end UDF modify the injection-file on the fly? Will Fluent actually reread the file every time step? It's just an idea. Anyone who tried this kind of things?

other suggestions?

thanks in advance,

Laika, still orbiting