A bent-straw setup with dyed water generates observable vortex rings and demonstrates secondary structures, mirroring, asymmetry, and inversion using simple parameters and smartphone video.
Use of interactive lecture demonstrations: a ten year study
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A bent straw as a tool for an affordable student-safe experiment in vortex ring dynamics
A bent-straw setup with dyed water generates observable vortex rings and demonstrates secondary structures, mirroring, asymmetry, and inversion using simple parameters and smartphone video.