Numerical simulations are reported which show that there are remarkably simple spatial structures associated with intermittent regions of vorticity. In particular, high-amplitude vortex structures are found which are tubelike and generate local velocity fields that spiral around them. This contrasts with the classical description of turbulence as an array of ‘pancake’- or ‘lasagne’-like eddies.
She, Zhen-Su; Jackson, Eric; Orszag, Steven A.
1990, Nature, 344, 226