These structures mode through the fluid according to classical equations of motion, and the resulting trajectories obey statistical equations which are identical to those of the Copenhagen interpretation of quantum mechanics. Similar emergence of quantum phenomena from completely classical motion is seen in videos of Yves Couder's experiments demonstrating tunnelling, double slit diffraction, and quantised energy levels. These videos can be found in the Experiments section.
Some of these structures are chiral. Opposite chiralities attract and like chiralities repel with a force that obeys Maxwell's equations, whose strength is characterised by a fine structure constant less than approximately 1 over 49.
The irrotational solutions of a compressible inviscid fluid are called sonons.


Image of an R_{11 }sonon. click on the image to view animation. 
Image of an eddy. Click on the image to view animation 
The R_{11 }sonon can be obtained by bending the eddy into a ring and giving it a twist.