Z. Grujic, The role of spatial analyticity in the local alignment of vorticity directions in 3D viscous fluids, NONLINEARIT, 12(5), 1999, pp. 1239-1246
We study local spatial dynamics of the vorticity directions in the 3D Navie
r-Stokes model. More precisely, utilizing the spatial analyticity of soluti
ons, we obtain estimates of the 2D Hausdorff measure of the level sets aris
ing in the local alignment.