Video 2

Movie S2. A video showing the helistograms (Right) for a collection of different helically wound rings (Left) with progressively smaller winding numbers, n, but with constant radii and helical amplitude. As the pitch of the helices increases, the helicity of the path becomes localized at progressively larger scales while diminishing in overall magnitude.

Helicity conservation by flow across scales in reconnecting vortex links and knots

Martin W. Scheeler, Dustin Kleckner, Davide Proment, Gordon L. Kindlmann, and William T. M. Irvine

PNAS. 2014. 111:15350-15355 DOI: 10.1073/pnas.1407232111