Investigation of the three-dimensional turbulent near-wake structure past a flat plate by tomographic PIV at high Reynolds number

Enrico Deri (1, 2) , Marianna Braza (2) , Emmanuel Cid (2) , Sébastien Cazin (2) , Dirk Michaelis (3) , Cédric Degouet (3)

1 Fondation de Coopération Scientifique Science Technique Aéronautique et Espace - FCS STAE (FRANCE)
2 IMFT - Institut de mécanique des fluides de Toulouse
3 LaVision (GERMANY)

This paper reports an experimental investigation of the high-Reynolds number turbulent flow pasta thin flat plate with sharpuntapered edges,by means of tomographic PIV. The experiments,carried out in the S4 wind tunnel of IMFT, have quantified the three-dimensional coherent vortex structures, by means of 3-D Proper Orthogonal Decomposition and reconstruction. The interaction of themostenergetic coherent structures with the random turbulence is discussed. Furthermore, Proper Orthogonal Decomposition (POD), analysis allowed evaluation of three-dimensional phase-averaged dynamics that quantified the vortex shedding mechanism as well as the influence of higher modes associated with the finer-scale turbulence.

Mots clés: Wake; Flat plate; Tomo; PIV

Domaines: Mécanique des fluides [physics.class-ph]

Enrico Deri, Marianna Braza, Emmanuel Cid, Sébastien Cazin, Dirk Michaelis, et al.. Investigation of the three-dimensional turbulent near-wake structure past a flat plate by tomographic PIV at high Reynolds number. Journal of Fluids and Structures, 2014, 47, pp.21-30. ⟨10.1016/j.jfluidstructs.2012.11.005⟩. ⟨hal-03521239⟩