https://doi.org/10.1007/s100510051088
Controlling the Bénard-von Kármán instability in the wake of a cylinder by driving the pressure at the front stagnation point
1
Laboratoire de PhysiqueCNRS, UMR 5672, École Normale Supérieure de Lyon,
46 allée d'Italie, 69364
Lyon Cedex 07, France
2
Laboratoire de Physique StatistiqueCNRS, UMR 8550,
École Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France
Received:
2
August
1999
Published online: 15 April 2000
We report an experimental method for inhibiting vortex shedding generated by the Bénard von Kármán instability (BvK) in the wake of a cylinder. We show that monitoring the pressure at the front stagnation point of a circular cylinder can completely suppress the Bénard-von Kármán instability for Reynolds numbers in the range 48.5<Re<150. We then study some properties of the BvK instability in the presence of suction at the front stagnation point and mention that this method can be used to generate well-controlled localized vortical structures in the form of vortex pairs.
PACS: 47.20.-k – Hydrodynamic stability / 47.27.Rc – Turbulence control / 47.27.Vf – Wakes
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
