Scientists from New York University and NYU Shanghai observed and reported how vortex rings, swirling donut-shaped masses, move through water and reach air without losing their shape, which had never ...

More information: Zhuang Su et al, Reflection of vortex rings at a water-air interface, Physical Review Fluids (2025). DOI: 10.1103/dg4m-hbts Provided by New York University ...

Furthermore, research into vortex-ring collisions with density interfaces has clarified the role of buoyancy and baroclinic vorticity generation in altering the translational speed and rotational ...

Vortex rings made from light were first observed in 2016 by researchers studying intense light pulses that become more focused as they travel. They discovered that light swirled in a doughnut ...

Vortex rings are not the only unusual signs of activity recently spotted at Mount Etna. On July 20, a new vent opened up in the Bocca Nuova crater, Behncke wrote on Twitter.

Vortex loops are common phenomena, showing up in not only smoke rings but mushroom clouds, fire-eater tricks, and even the sun's outer atmosphere, the corona. A big question was what happens to ...

By Emily Conover June 10, 2022 at 7:00 am - More than 2 years ago Smoke rings are being seen in a new light. Doughnut-shaped structures called vortex rings are sometimes seen swirling through fluids.

Helicopters affected by the vortex ring state experience vibration, uncommanded oscillation in the pitch and roll axes, limited flight control, and – most critically – high descent rates of up ...

A team of researchers discovered an extraordinary property of vortex rings—how dolphins propel themselves underwater—that science had overlooked for a century. Scientists from New York ...

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 ...