Bifurcations and symmetry breaking in the wake of axisymmetric bodies

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 mo...

Full description

Saved in:
Bibliographic Details
Published inPhysics of fluids (1994) Vol. 20; no. 5; pp. 051702 - 051702-4
Main Authors Fabre, David, Auguste, Franck, Magnaudet, Jacques
Format Journal Article
LanguageEnglish
Published Melville, NY American Institute of Physics 01.05.2008
Subjects
Engineering Sciences
Exact sciences and technology
Fluid dynamics
Fluid mechanics
Fluids mechanics
Fundamental areas of phenomenology (including applications)
Hydrodynamic stability
Laminar flows
Mechanics
Nonlinearity (including bifurcation theory)
Physics
Stability of laminar flows
Bifurcation
Wakes
Laminar flow
Revolving body
Hydrodynamic instability
Symmetry breaking
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.2909609