Non uniform Rotating Vortices and Periodic Orbits for the Two-Dimensional Euler Equations
2020
This paper concerns the study of some special ordered structures in turbulent flows. In particular, a systematic and relevant methodology is proposed to construct non trivial and non radial rotating vortices with non necessarily uniform densities and with different m-fold symmetries,
$$m\geqq 1$$
. In particular, a complete study is provided for the truncated quadratic density
$$(A|x|^2+B){\mathbf{1}}_{{\mathbb {D}}}(x)$$
, with
$${\mathbb {D}}$$
the unit disc. We exhibit different behaviors with respect to the coefficients A and B describing the rarefaction of bifurcating curves.
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