Experimental vortex breakdown topology in a cylinder with a free surface.

David Lo Jacono (1, 2) , Mehdi Nazarinia (2) , Morten Brons (3)

1 IMFT - Institut de mécanique des fluides de Toulouse
2 Fluids Laboratory for Aeronautical and Industrial Research - FLAIR (Victoria, Australia)
3 Department of Mathematics (Kongens Lyngby, Denmark)

The free surface flow in a circular cylinder driven by a rotating bottom disk is studied experimentally using particle image velocimetry. Results are compared with computational results assuming a stress-free surface. A dye visualization study by Spohn et al.. We confirm the existence of a transition where the top of the breakdown bubble crosses from the axis to the surface, which has previously only been found numerically. We employ a technique by Brøns et al.

Mots clés: Vortex breakdown

Domaines: Mécanique des fluides [physics.class-ph]

David Lo Jacono, Mehdi Nazarinia, Morten Brons. Experimental vortex breakdown topology in a cylinder with a free surface.. Physics of Fluids, 2009, 21 (11), pp.0. ⟨10.1063/1.3265718⟩. ⟨hal-03562695⟩