Abstract
In the framework of the Global Regularity Problem for the incompressible Navier–Stokes (NS) equations in the whole space \({{\mathbb{R}}^{3}}\), Li and Sinai in [13] proved that there are smooth complex solutions that become singular (“blow-up”). We discuss the possible extension of the Li-Sinai approach to real solutions and report results obtained by computer simulations on the behavior of a particular solution related to the complex blow-up. Although a blow-up is excluded by axial symmetry, the solution is a good model of a “tornado-like” behavior, with a sharp increase of speed and vorticity concentrated in an annular region around the symmetry axis. We conclude with a discussion on the search of possible candidates for a real blow-up in the framework of the Li-Sinai approach.
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ACKNOWLEDGMENTS
The computer simulations were performed at the Marconi Supercomputer of CINECA (Bologna, Italy), within the framework of a European PRACE Project no. 2015133169, and also of CINECA ISCRA Projects of type B and C.
Funding
Partially supported by research funds of INdAM (G.N.F.M.), M.U.R.S.T. and Università Roma Tre.
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Boldrighini, C., Frigio, S., Maponi, P. et al. An Antisymmetric Solution of the 3D Incompressible Navier–Stokes Equations with “Tornado-Like” Behavior. J. Exp. Theor. Phys. 131, 356–360 (2020). https://doi.org/10.1134/S1063776120060023
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DOI: https://doi.org/10.1134/S1063776120060023