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arxiv: 1712.07434 · v6 · pith:QYWNIM6Xnew · submitted 2017-12-20 · 🧮 math.AP

Removing Type II singularities off the axis for the 3D axisymmetric Euler equations

classification 🧮 math.AP
keywords axisinftytorusaxisymmetricballblow-upeulergamma
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We prove local blow-up criterion for smooth axisymmetric solutions to the 3D incompressible Euler equation. If the vorticity satisfies $ \intl_{0}^{t_*} (t_*-t) \| \omega (t)\|_{ L^\infty(B(x_{ \ast}, R_0))} dt <+\infty$ for a ball $B(x_{ \ast}, R_0)$ away from the axis of symmetry, then there exists no singularity at $t=t_*$ in the torus $T(x_*, R)$ generated by rotation of the ball $B(x_{ \ast}, R_0)$ around the axis. This implies that possible singularity at $t=t_*$ in the torus $T(x_*, R)$ is excluded if the vorticity satisfies the blow-up rate $ \|\o (t)\|_{L^\infty (T(x_*, R))}= O\left(\frac{1}{(t_*-t)^\gamma}\right)$ as $t\to t_*$, where $\gamma <2$ and the torus $T(x_*, R)$ does not touch the axis.

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