PAUL SILVERSTONE / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY PAUL SILVERSTONE / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY
The turbulent mixing of a dye in water. The dye is introduced at the surface of the water. As they are denser, streams of dye start to run downward through the water. Viscosity and drag effects at the dye/water boundary start to deform the dye streams, producing the vortices seen here.
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