Stability of two-dimensional viscous incompressible flows under three-dimensional perturbations and inviscid symmetry breaking
- Author(s): Bardos, C
- Lopes Filho, MC
- Niu, D
- Nussenzveig Lopes, HJ
- Titi, ES
- et al.
Published Web Locationhttps://doi.org/10.1137/120862569
In this article we consider weak solutions of the three-dimensional incompressible fluid flow equations with initial data admitting a one-dimensional symmetry group. We examine both the viscous and inviscid cases. For the case of viscous flows, we prove that Leray-Hopf weak solutions of the three-dimensional Navier-Stokes equations preserve initially imposed symmetry and that such symmetric flows are stable under general three-dimensional perturbations, globally in time. We work in three different contexts: two-and-a-half-dimensional, helical, and axisymmetric flows. In the inviscid case, we observe that as a consequence of recent work by De Lellis and Székelyhidi, there are genuinely three-dimensional weak solutions of the Euler equations with two-dimensional initial data. We also present two partial results where restrictions on the set of initial data and on the set of admissible solutions rule out spontaneous symmetry breaking; one is due to P.-L. Lions and the other is a consequence of our viscous stability result. © 2013 Society for Industrial and Applied Mathematics.