Vortex (fluid mechanics)
= Vortex
{disambiguate=fluid mechanics}
{wiki=Vortex}
= Fluid vortex
{synonym}
A fluid vortex is a region in which <velocity field> circulates about an axis or center. <Vorticity> measures local rotation, while <circulation> measures the integral of velocity around a closed path. A <phase vortex> is instead a <topological defect> defined by winding of an order parameter; superfluid examples connect the two notions.