{"version":"1.0","type":"link","title":"Vortex ring - Newikis","description":"A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed loop. The dominant flow in a vortex ring is said to be toroidal, more precisely poloidal.[clarification needed]","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://upload.wikimedia.org/wikipedia/commons/c/c1/Vortex_Ring_Gun_Schlierin.jpg","thumbnail_width":496,"thumbnail_height":390}