Existence results for mean field equations with turbulence

Details Existence results for mean field equations with turbulence Existence results for mean field equations with turbulence

2007-05-11

arxiv.org/abs/0705.1687v1

Mathematics

Analysis of PDEs

Scientific paper

In this paper we consider the following form of the so-called Mean field equation arising from the statistical mechanics description of two dimensional turbulence \begin{equation}\label{eq:study} - \D_g u = \rho_1 (\frac{e^{u}}{\int_\Sig e^{u} dV_g}-1)-\rho_2 (\frac{e^{-u}}{\int_\Sig e^{-u} dV_g} - 1) \end{equation} on a given closed orientable Riemannian surface ($\Sigma, g$) with volume 1, where $\rho_1, \rho_2$ are real parameters. Exploiting the variational structure of the problem and running a min-max scheme introduced by Djadli and Malchiodi, we prove that if $k$ is a positive integer, $\rho_1$ and $\rho_2$ two real numbers such that $\rho_1\in (8k\pi, 8(k+1)\pi)$ and $\rho_2<4\pi$ then $\eqref{eq:study}$ is solvable.

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