The first observation of a stable torus of fluid's resonance frequencies


picture from https://phys.org/news/2019-09-stable-torus-fluid-resonance-frequencies.html 

A team of researchers at Laroche Laboratory, Université Paris Diderot and Université de Lyon has recently collected the first measurements of the resonance frequencies of a stable torus of fluid. The method they used to collect these observations, outlined in a paper published in Physical Review Letters, could enable the modeling of a variety of large-scale structures that transiently arise in vortex rings.

Vortex rings are torus-shaped vortexes that can appear in both liquids and gases ...

Read more at phys.org https://phys.org/news/2019-09-stable-torus-fluid-resonance-frequencies.html

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