Separated Flows Wakes and Cavities Olivier Cadot, Equipe Dynamique des Fluides et Acoustique de l’Unité de Mécanique, ENSTA, Palaiseau. Overview Short.

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Presentation transcript:

Separated Flows Wakes and Cavities Olivier Cadot, Equipe Dynamique des Fluides et Acoustique de l’Unité de Mécanique, ENSTA, Palaiseau. Overview Short serie of 4 lectures Application fields : naval research, aerodynamics of salient bodies (cars, lorries… ), geophysical flows (island wakes)...

Streamlines that do not follow the solid body attached flow Complex wake structure and dynamics Consequence on drag and lift separated flow

Bluff body wakes at large Reynolds numbers circular cylinder Re=10 2.

Bluff body wakes at large Reynolds numbers Square cylinder Re=10 4.

Bluff body wakes at large Reynolds numbers Car (real scale Re = ) Car, lorries, trains Re>10 6. Car (scale 1/8)

Bluff body wakes at large Reynolds numbers Island wakes Re>10 8.

Bluff body wakes at large Reynolds numbers airfoils Re>10 6.

Vapor and gaz cavities in liquids at large Re Cavity size Local pressure, drag and lift Cavity dynamic Super-cavities, ventilated wake. Cavitating blade Cavitating plate wake Super-cavitation

Lecture plan 12th december. 19th december. 9th january at ENSTA Palaiseau, fluid mechanics facilities 16th january at ENSTA Palaiseau, fluid mechanics facilities. Examination : to be defined. absent from 4th feb to 13th may Generalities Separation in context of the B.L.T. 2D Bluff body flows Free streamline flow theory Cavitation

ENSTA Cavitation Tunnel lecture room D105 meeting in front of the main entrance

The SOURCES / Articles from < some recent reviews Books :