Instabilities between rotating and stationary parallel disks with suction
Résumé
From visualizations, we study the patterns' formation of the flow in a stationary cylinder driven by a rotating bottom disk when central suction is applied. That creates an annular axial jet at the cavity periphery which destabilizes and gives rise to instability patterns. We distinguish two types of instability patterns and study more particularly the one which takes place in the boundary layer of the cylindrical wall.