Vanishing of mode B in the wake behind a rotationally oscillating circular cylinder

Philippe Poncet (1)

1 LMAP - Laboratoire de Mathématiques et de leurs Applications [Pau]

This Brief Communication presents a numerical investigation of the dimensionality of a flow behind a three-dimensional rotationally oscillating circular cylinder. These computations are performed at a Reynolds number Re500, which is at a level where the mode B is the dominant three-dimensional instability. We show that a rotation of high enough amplitude makes the 3D instabilities vanish and brings the flow back to its nominal two-dimensional state.

Domaines: Mathématiques [math]; Analyse numérique [math.NA]; Optimisation et contrôle [math.OC]; Modélisation et simulation; Mécanique des fluides [physics.class-ph]

Philippe Poncet. Vanishing of mode B in the wake behind a rotationally oscillating circular cylinder. Physics of Fluids, 2002, 14 (6), pp.2021-2023. ⟨10.1063/1.1479344⟩. ⟨hal-02010698⟩