Assertion: vortex ring | /r/HasProperty | torus-shaped vortex
Facets:
value: in gas
type: LOCATION
value: in a fluid
type: LOCATION
Source sentences:
text: A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid or gas; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed loop.