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von Karman wake

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Uploaded by on Nov 9, 2008

Vortex shedding in the wake of a stationary cylinder in a vertically flowing soap film at Reynolds number Re ~ 3600. The characteristic staggered arrangement of vortices is the celebrated von Kármán vortex street.

In this video, a cylinder penetrates a downwards flowing soap film. Thin-film interference shows the vortices formed by the comlicated interaction of flow and structure.

Credits: Teis Schnipper, Physics Department, Technical University of Denmark.

www.fysik.dtu.dk/~schnipper

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