vortex ring

(redirected from Hill's spherical vortex)
Also found in: Encyclopedia.
Related to Hill's spherical vortex: Vortex ring

vortex ring

n
(General Physics) a stable perturbation in a fluid that takes the form of a torus in which the flow rotates in the section of the torus so that the pressure difference between the inside and outside of the torus balances body forces. The best-known vortex ring is a smoke ring
Mentioned in ?