Reflectional symmetry breaking of the separated flow over three-dimensional bluff bodies

Mathieu Grandemange; Olivier Cadot; Marc Gohlke

Reflectional symmetry breaking of the separated flow over three-dimensional bluff bodies

Mathieu Grandemange ¹ Olivier Cadot ¹ Marc Gohlke ²

1 DFA - Dynamique des Fluides et Acoustique

Abstract : Experimental observation of a permanent reflectional symmetry breaking (RSB) is reported for a laminar three-dimensional wake. Based on flow visualizations, a first bifurcation from the trivial steady symmetric state to a steady RSB state is characterized at Re=340. The RSB state becomes unsteady after a second bifurcation at Re=410. It is found that this RSB regime is persistent at large Reynolds numbers and is responsible for a bistable turbulent wake.

Document type :

Journal articles

Domain :

Physics [physics] / Mechanics [physics] / Mechanical engineering [physics.class-ph]

Engineering Sciences [physics] / Mechanics [physics.med-ph] / Mechanical engineering [physics.class-ph]

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https://hal-ensta-paris.archives-ouvertes.fr//hal-00838864
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Submitted on : Wednesday, November 29, 2017 - 3:05:46 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:05 AM

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Reflectional symmetry breaking of the separated flow over three-dimensional bluff bodies

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