irrotational motion

irrotational motion

[¦ir·ə′tā·shən·əl ′mō·shən]
(fluid mechanics)
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It covers kinematics of fluid flows, dynamics of frictionless fluids, the irrotational motion of an incompressible fluid: Laplace's equations, the motion of bodies in an incompressible frictionless fluid, and plane irrotational incompressible flow: complex variables.