air vortex

For example, a dust devil is a column of dust picked up by the core of an air vortex attached to the ground.

The air flow is directed through the windway against the upper labium where air vortexes replace each other alternatingly to the inside and the outside.

Air vortices can form around the main rotor of a helicopter, causing a dangerous condition known as vortex ring state (VRS) or "settling with power".

Toys that blow air vortices, like the air vortex cannon, are mainly used to tickle people or animals at a distance with an "invisible hand".

To celebrate the 20 year anniversary of Erbert & Gerbert's, a commercial was created allegedly using the world's largest Air Vortex Cannon.

The air vortex cannon is a toy that fires doughnut-shaped air vortices - similar to smoke rings but larger, stronger, and completely invisible.

These properties of vortex rings are exploited in the vortex ring gun for riot control and vortex ring toys such as the air vortex cannons.

The design also aims to do away with any extra resistance generated by the wheels turning, as well as achieving a structure which would create the fewest possible air vortices.

In one part of "Oceans," for example, visitors can control the shape and flow of an air vortex within a tube of water, but nowhere is there an explanation of the suction principal that makes it work.