Kármán vortex street
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In fluid dynamics, a Kármán vortex street is a repeating pattern of swirling vortices, caused by a process known as vortex shedding, which is responsible for the unsteady separation of flow of a fluid
Visualisation of the vortex street behind a circular cylinder in air (on the left); the flow is made visible through release of glycerol vapour in the air near the cylinder
A look at the Kármán vortex street effect from ground level, as air flows quickly from the Pacific Ocean eastward over Mojave Desert mountains. This phenomenon observed from ground level is extremely rare; most cloud-related Kármán vortex street activity is viewed from space.
Chimneys with strakes fitted to break up vortices
Vortex street 1
Tacoma Narrows Bridge (1940)
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The 1940 Tacoma Narrows Bridge, the first bridge at this location, was a suspension bridge in the U.S. state of Washington that spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the
The original Tacoma Narrows Bridge on its opening day on July 1, 1940
Program for the opening of the Tacoma Narrows Bridge, June 30, 1940
The main bridge span falling into the strait on November 7, 1940
A fragment of the collapsed bridge, in the Washington State History Museum in Tacoma