Bifurcations and symmetry breaking in the wake of axisymmetric bodies | Zendy

David Fabre | Zendy; Franck Auguste | Zendy; Jacques Magnaudet | Zendy

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Bifurcations and symmetry breaking in the wake of axisymmetric bodies

Author(s) -

David Fabre,

Franck Auguste,

Jacques Magnaudet

Publication year - 2008

Publication title -

physics of fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.188

H-Index - 180

eISSN - 1089-7666

pISSN - 1070-6631

DOI - 10.1063/1.2909609

Subject(s) - physics , wake , rotational symmetry , classical mechanics , reynolds number , lift (data mining) , mechanics , vortex , focus (optics) , symmetry (geometry) , symmetry breaking , turbulence , geometry , optics , quantum mechanics , mathematics , computer science , data mining

We consider the generic problem of wake instabilities past fixed axisymmetric bodies, and focus on\udthe extreme cases of a sphere and a flat disk. Numerical results reveal that the wakes of these two\udbodies evolve differently as the Reynolds number is increased. Especially, two new vortex shedding\udmodes are identified behind a disk. To interpret these results, we introduce a model based on the\udtheory 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

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