You are right Prof. I was reading in the Nature Physics Letters that the light interference patterns on a bubble sometimes takes the shape of a vortex. I think all these shapes conform to the minimalisation theory which means that nature stives to retain the shape that takes the minimal energy.
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Originally Posted by Profpat  Hi Dipayankar;
While the vortex structure is in nature, I'm not sure that it's the preferred structure. There is also the cubical structure for crystaline substances; the spherical structure for stars, planets and other heavenly bodies; the circular structure for many galaxies; and so on. I don't know if nature has a preferrence for structure, rather it appears that form follows substance.
Best to all,
Pat |