A short animated-gif of the upwards spiralling figure 8 particle, from the older high res Screencast-movie that I mention in 'About Me' on the side (movie - 40Mb) ... and what this whole project is actually about.
Similar to Professor Oscar Velasco Fuentes' knotted filamentary-vortex simulations:
The final goal is to get this action 'naturally' going within a gas made out of frictionless (ellipsoidal) particles, wherein these of loops automatically would emerge thanks to the right destiny and velocity of the particles that make up the medium. Check the iPhone physics-app 'Liquid' to get an impression of such a gas: https://itunes.apple.com/en/app/liquid-dynamics/id417814216?mt=8
When you adjust the settings you get a medium where continuously semi-vortices pop up:
These are the settings to get the desired 'effect':
... but these semi-vortices are unstable and come and go into existence, so that's why the idea surfaced to use 'slippery' 0val-bodies instead of the 'classic' spherical point-particles; and because these 0val-particles interact in a unique way, with the path that redirects them again along their central-axis, they might a that extra ingredient to the medium, whereby some of these semi-vortices are replaced by vortices that are stable, and take on a steady / solid form within the medium, a bit like how these kids form a closed loop:
A flow / string would flex around within the medium ...
... like a snake ...
... and form a closed unit:
Ouroboros - tail eating snake (close looping).
Golden Fig. 8 knot : http://www.youtube.com/watch?v=dpUYLxpTcts