I have been using fix insert/stream to add particles into a simulation through an insertion face. However, the specified particle rate is not obtained if I set a high value of particle rate and a low value for the inflow velocity. I presume the absolute limit of this would be when the spheres are tightly packed, but when I visualise the inlet box using the correct particle size in paraview (glyph), the particles are well spaced out. Can anyone explain what is happening and what is the limiting criteria for correct particle rates to be achieved?
Many thanks!