A Kármán vortex street is a recurring pattern of swirling vortices caused by the unsteady separation of flow of a fluid around a bluff body (an object with a large cross-section, such as a cylinder). This phenomenon was first described by Hungarian-American engineer Theodore von Kármán in the 1910s. When a fluid flows past a blunt object, such as a cylinder or a flat plate, it can create alternating low-pressure and high-pressure areas in the flow.
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