[fredrick]

Greetings ladies and gentlemen.

I'm working on a multi-phase problem to investigate segregation of two solids in a fluidized bed. Refer to the picture attached.
Air enters from the bottom as a fluidizing medium. one solid is patched with a volume fraction of say 0.56. I would like to have the second solids coming from a side inlet which is a mass flow inlet.

Problem: after specifying the mass flow inlet of the second solids, the solid is not moving even after simulation time of 15 seconds.
question: How do I introduce the second solids say 0.003kg/s.

Thanks in advance