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Bifurcations and symmetry breaking in the wake of axisymmetric bodies

Fabre, David and Auguste, Franck and Magnaudet, Jacques Bifurcations and symmetry breaking in the wake of axisymmetric bodies. (2008) Physics of Fluids, 20 (5). 1-4. ISSN 1070-6631

(Document in English)

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Official URL: http://dx.doi.org/10.1063/1.2909609


We consider the generic problem of wake instabilities past fixed axisymmetric bodies, and focus on the extreme cases of a sphere and a flat disk. Numerical results reveal that the wakes of these two bodies evolve differently as the Reynolds number is increased. Especially, two new vortex shedding modes are identified behind a disk. To interpret these results, we introduce a model based on the theory of mode interactions in presence of O(2) symmetry. This model, which was initially developed for the Taylor–Couette system, allows us to explain the structural differences observed in the evolution of the two types of wakes and to accurately predict the evolution of the lift force.

Item Type:Article
Additional Information:Thanks to American Institute of Physics editor. The definitive version is available at http://scitation.aip.org/content/aip/journal/pof2/20/5/10.1063/1.2909609
HAL Id:hal-00874366
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:17 Oct 2013 13:17

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