Discrete phase model (DPM)
This model consists in the injection of particles, but considering a given flow rate. With this method, it is possible to see some dump.

Injection of steel particles with a flow rate of 0.01kg / sec

injection of wood. Flow rate 0.01 kg / sec

Argon particles. Flow rate: 0.1 kg /sec

It is interesting to see the behaviour of different particles. The heavy ones tend to lay on the interns whereas the light ones are concentrated on surprising places.