Circulation (physics)
Line integral of the fluid velocity around a closed curve / From Wikipedia, the free encyclopedia
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In physics, circulation is the line integral of a vector field around a closed curve. In fluid dynamics, the field is the fluid velocity field. In electrodynamics, it can be the electric or the magnetic field.
Circulation was first used independently by Frederick Lanchester, Martin Kutta and Nikolay Zhukovsky.[citation needed] It is usually denoted Γ (Greek uppercase gamma).