1303.0257 (Zachary Bradshaw et al.)

Blow-up scenarios for 3D NSE exhibiting sub-criticality with respect to
the scaling of one-dimensional local sparseness    [PDF]

Zachary Bradshaw, Zoran Grujic

It is shown that, if the vorticity magnitude associated with a (presumed singular) three-dimensional incompressible Navier-Stokes flow blows-up in a manner exhibiting certain {\em time dependent local structure}, then {\em time independent} estimates on the $L^1$ norm of $|\omega|\log\sqrt{1+ |\omega|^2}$ follow. The implication is that the volume of the region of high vorticity decays at a rate of greater order than a rate connected to the critical scaling of one-dimensional local sparseness and, consequently, the solution becomes sub-critical.

View original: http://arxiv.org/abs/1303.0257