Science, Space and Technology News 2024
An artistic impression of a vortex-ring street analog to the structure of magnetic field of a NDSTP, where the right- and left- handed vortex rings were highlighted by blue and red, respectively. Credit: Yijie Shen, Nikitas Papasimakis, and Nikolay I. Zheludev
The Kármán vortex street is a highly organized classical flow pattern featuring swirling vortices. It typically includes two sequences of vortices, each emerging from opposite sides of the body, with circulations of opposite signs. This phenomenon is renowned for its aesthetic beauty and tremendous power.In the museum at the Church of St Dominic in Bologne, Italy, there is a painting depicting St. Christopher carrying the infant Jesus across a river.
Skyrmions, sophisticated topological particles originally proposed as a unified model of the nucleon by Tony Skyrme in 1962, behave likemagnetic vortices with spectacular textures. To date, all known optical skyrmions in free space do not propagate or only exist around focus and collapse rapidly upon propagation.
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