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...

The vortex ring state (VRS) is a dangerous aerodynamic condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor, causing...

The vortex ring gun is an experimental non-lethal weapon for crowd control that uses high-energy vortex rings of gas to knock down people or spray them...

bubble ring, or toroidal bubble, is an underwater vortex ring where an air bubble occupies the core of the vortex, forming a ring shape. The ring of air...

A smoke ring is a visible vortex ring formed by smoke in a clear atmosphere. Smokers may blow smoke rings from the mouth, intentionally or accidentally...

An air vortex cannon is a toy that releases doughnut-shaped air vortices — similar to smoke rings but larger, stronger and invisible. The vortices can...

In fluid dynamics, a vortex (pl.: vortices or vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or...

legacy. The vortex theory of the atom was based on the observation that a stable vortex can be created in a fluid by making it into a ring with no ends...

quadcopters are subject to normal rotorcraft aerodynamics, including the vortex ring state.[citation needed] The main mechanical components are a fuselage...

The concept of a vortex engine or atmospheric vortex engine (AVE), independently proposed by Norman Louat and Louis M. Michaud, aims to replace large...

the low-velocity region of spherical vortex breakdown of a natural vortex[vague] (e.g., the 'Hill's spherical vortex'). Oleg Meshcheryakov suggests that...

unique type of vortex ring that stays attached to the seed rather than being sent downstream. In addition to the creation of this vortex ring, the pappus...

variety of complex flow phenomena, such as the formation and motion of vortex rings. Mathematically, the vorticity ω {\displaystyle {\boldsymbol {\omega...

"Mount Etna blows smoke rings during volcanic eruptions". NBC News. 12 April 2013. Retrieved 15 April 2013. "Vortex rings made of water vapour rise...

example, vortex rings will shrink, and Kelvin waves will decrease in amplitude. Vortex lattices are laminar (ordered) configurations of vortex lines that...

existence of quantized vortex lines in superfluid helium. In the 1960s, Rayfield and Reif established the existence of quantized vortex rings. Packard has observed...

of subatomic particles. It is also known as the plasmoid ring, vortex ring, or helicon ring. This physical model treated electrons and protons as elementary...

arrest its descent. This hazard can develop into vortex ring state if not corrected early. Vortex ring state is a hazard induced by a combination of low...

determined that the aircraft had entered an aerodynamic condition known as vortex ring state, which resulted from a high rate of descent compounded by pilot...

energy source used in reflection seismology Air vortex cannon, a toy gun that fires air vortex rings Airsoft gun, a replica gun used in airsoft sports...

vortex in Wiktionary, the free dictionary. A vortex is a dynamic phenomenon of fluids. Vortex may also refer to: Vortex ring, a torus-shaped vortex in...

refraction surveys Air vortex cannon, a toy gun that fires air vortex rings Vortex ring gun, a non-lethal weapon that fires gas vortex rings Air Cannon (Mario)...

of pedal work for the pilot to eliminate unintended yaw. Tail rotor vortex ring state - Wind moving in the same direction as the tail rotor moves air...

turbulent vortices curling downward around its edges, forming a temporary vortex ring that draws up a central column, possibly with smoke, debris, condensed...

role in the wind-aided dispersal of its seeds. By creating a separated vortex ring in its wake, the flight of the pappus is stabilized and more lift and...

expansion phases to create two vortex rings. Muscles are used for the contraction of the body, which creates the first vortex and pushes the animal forward...

recoil, momentum, and the physical presence of objects in games. Air vortex rings are donut-shaped air pockets made up of concentrated gusts of air. Focused...

software, and procedures in response to hydraulic fires in the nacelles, vortex ring state control issues, and opposed landings; reliability has improved...

Bubble or vortex ring thermal model (left), and column or plume thermal model (right)...

Verkehrsverbund Rhein-Sieg, public transport in the Cologne/Bonn region of Germany Vortex ring state, a helicopter flight condition Skoda vRS car models an alternate...