Thruster fields kicked up small vortices of chalky dust as they hovered.

For example, an airplane wing that is developing lift will create a sheet of small vortices at its trailing edge.

These small vortices merge to form a single wingtip vortex, less than one wing chord downstream of that edge.

A slender coil of smoke was being drawn into the small vortex created by the hull breach.

A small vortex appears over the bucket, and the water begins to swirl like a whirlpool.

The energy of the large vortices are, by this method, is transferred to much smaller isotropic vortices.

Witnesses recalled that the tornado's massive funnel resembled black smoke and was accompanied by smaller multiple vortices.

The storm initially moved very little, and the presence of several small vortices from within the deep convection caused difficulty in determining the exact center location.

But they were really only fireworks instead of deadly small vortexes of ball-lightning.

The storms themselves were relatively small vortexes of wind and precipitation circling counterclockwise around a central core.