%0 Journal Article
%T The impact of a local perturbation on global properties of a turbulent wake
%+ Unité de Mécanique (UME)
%A Parezanović, Vladimir
%A Cadot, Olivier
%< avec comité de lecture
%@ 1070-6631
%J Physics of Fluids
%I American Institute of Physics
%V 21
%P 071701
%8 2009-01-01
%D 2009
%R 10.1063/1.3184615
%K Flow instabilities
%K Rotating flows
%K Vortex dynamics
%K Reynolds stress modeling
%K Drag reduction
%Z Engineering Sciences [physics]Journal articles
%X Stationary perturbation techniques are used to investigate the sensitivity of the global properties ofthe wake behind a bluff body at moderate Re. The entire recirculation bubble is found to be asensitive region for the global frequency selection and the quality of the synchronization. A strikingposition is found at its center where synchronization is destroyed and the frequency is increased.High speed particle image velocimetry sheds some light into the underlying mechanisms, which areinterpreted in terms of vorticity interaction, flow reattachment, and flow deviation. Strong meanflow modifications are observed to correspond to drastic changes in drag and its fluctuations
%G English
%2 https://hal-ensta-paris.archives-ouvertes.fr/hal-01289971/document
%2 https://hal-ensta-paris.archives-ouvertes.fr/hal-01289971/file/VPOC.pdf
%L hal-01289971
%U https://hal-ensta-paris.archives-ouvertes.fr/hal-01289971
%~ ENSTA
%~ ENSTA_UME
%~ ANR