In
fluid dynamics, a
Kármán vortex street (or a
von Kármán vortex sheet) is a repeating pattern of swirling
vortices caused by the unsteady
separation of flow of a
fluid around blunt bodies. It is named after the engineer and fluid dynamicist
Theodore von Kármán, and is responsible for such phenomena as the "singing" of suspended telephone or power lines, and the vibration of a car antenna at certain speeds.