Vortex guns capable of firing doughnut-shaped rings of air have sat around as toys or oddball gadgets for years. Now a U.S. lab has added an extra kick with electrically charged rings that could clear ...

Vortex flow: still from a simulation video showing how air from a sneeze can envelope a face shield. (Courtesy: Fujio Akagi/Isao Haraga/Shin-ichi Inage/Kozaburo Akiyoshi) Vortex rings created when a ...

Air cannons produce visible vortex rings by generating rotating air pressure differences, while electromagnetic cannons emit electromagnetic vortex pulses using coaxial horn antennas. The ...

Toroidal pulses Air cannons produce visible vortex rings by generating rotating air pressure differences, while electromagnetic cannons emit electromagnetic vortex pulses using coaxial horn antennas. ...

Air rings blown by dolphins swimming underwater and rings of smoke emitted by jet engines are just two examples of vortex rings. These doughnut-shaped structures and their mesmerizing movement have ...