DrAmine
Ansys Employee

You can go for DPM if volume fraction of air is not very high. DPM is only coupled with primary phase in case you want to account for two-way effects. You can deal all that within Eulerian Multiphase Model where you get started by Mixture model with three phases. Here you need to know the volume fraction of air coming from the sides.If only air is coming from there than simpe set it to one. That is your input.