SHEAR LAYER INSTABILITY AND FREQUENCY MODES INSIDE AN OPEN CAVITY

François Lusseyran (1) , Thierry Faure (1) , Céline Eschenbrenner (1) , Y. Fraigneau (1)

1 LIMSI - Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur

The dynamic behaviour of the vortex structures occurring in a cavity, in interaction with an upstream wall flow, drives the fluid confinement inside the cavity. This presentation concerns the coupling between the shear instability process and the mechanisms of frequency selection which depend on the size of the cavity. The analysis is based on an experimental exploration of the flow (LDV, PIV) and on direct numerical simulation.

Mots clés: open cavity flow; frequency modes; mixing layer; PIV; LDV; stability

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

François Lusseyran, Thierry Faure, Céline Eschenbrenner, Y. Fraigneau. SHEAR LAYER INSTABILITY AND FREQUENCY MODES INSIDE AN OPEN CAVITY. 2005, pp.FM13-10188. ⟨hal-00090556⟩