The interaction of moving fluids with particles is still only understood phenomenologically when the Reynolds number is not vanishing. I will present three different numerical studies all using the solver “fluent” which elucidate this issue from different points of view. On one hand, I will...

A major issue in material science is the formulation of a macroscopic description of material properties based on local characteristics. We consider here the case of a granular medium, for which we show that the applicable treatments depend not only on the nature of the disorder but also on the...