Rob
Ansys Employee

You'll need to be more specific. Multiphase is a mix of understanding the application and required outcome AND how then to best model it. I've modelled cyclones with DPM, Ansys Rocky (DEM) and Eulerian: all three are correct approaches but each was to capture a different requirement. 

Pictures only, as staff I'm not permitted to open/download anything or follow links other than to public sites (and only if we recognise it!).