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Title: Break-up of a wing tip vortex

Description: Revealed and studied for the first time in 1960, this break-up phenomenon characterizes the sudden disorganisation of the vortices, which takes place under the effect of an adverse pressure gradient. The colored streak emitted at the wing tip visualizes the vortex core, well-organized and stable at first, then becoming unsteady and taking the shape of a helix of increasing diameter. Image created by Henri Werlé. Reproduced with permission from his spectacular collection Courants et Couleurs published in 1974 by ONERA, the French Aerospace Lab. For further information, see On the Flow of Fluids Made Visible, Henri Werlé, Leonardo, Vol. 8, No. 4. (Autumn, 1975), pp. 329-331.

Credits: <u>Henri Werlé</u>


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