Toroidal vortex

It's also called a vortex ring; is a coil-shaped vortex in a fluid (like air); that is, an area where the fluid mostly spins around an imaginary axis line with a shape of closed loop. The dominant flow in a vortex ring is annular shaped. or more precisely poloidal (doughnut-shaped).
In simple terms: Toroidal vortex is a vortex or ring-shaped flow that is created and rotates around a larger ring.