Turbulence

Turbulence or turbulent flow is violent, unsteady, chaotic movement of fluids like air and water, and is contrasted with laminar flow.

Turbulence Media

Laminar and turbulent water flow over the hull of a submarine. As the relative velocity of the water increases turbulence occurs.
Turbulence in the tip vortex from an airplane wing passing through coloured smoke
Flow visualization of a turbulent jet, made by laser-induced fluorescence. The jet exhibits a wide range of length scales, an important characteristic of turbulent flows.

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