vortex ring

1 definition found

vortex ring - Collaborative International Dictionary of English v.0.48 :

  Vortex ring \Vortex ring\ (Physics)
     A ring-shaped mass of moving fluid which, by virtue of its
     motion of rotation around an axis disposed in circular form,
     attains a more or less distinct separation from the
     surrounding medium and has many of the properties of a solid.
     [Webster 1913 Suppl.]