English

Weak and dissipative solutions for the Hasegawa-Mima equation

Analysis of PDEs 2026-07-01 v1 Mathematical Physics

Abstract

We consider the Hasegawa-Mima equation in its ``Euler-like'' velocity form: t(uΔ1u)+(u)uulogn0=0,\partial_t(u-\Delta^{-1}u)+(u\cdot\nabla)u-u^\perp\log n_0=0, n0n_0 being the time-independent function appearing in the particle count n=n0eeφTn=n_0e^{\frac{e\varphi}{T}}, and uu being the drift velocity φ=φ×z^\nabla^\perp\varphi=-\nabla\varphi\times\hat z. Adapting the notion from Lions' book on the Euler equations, we prove the existence of dissipative solutions for this equation for any L2L^2 divergence free initial condition wL2(D)w\in L^2(D), for D=T2D=\mathbb T^2 and DR2D\subset\mathbb R^2 a bounded C1\mathcal{C}^1 domain.

Keywords

Cite

@article{arxiv.2607.01119,
  title  = {Weak and dissipative solutions for the Hasegawa-Mima equation},
  author = {Michele Gorini},
  journal= {arXiv preprint arXiv:2607.01119},
  year   = {2026}
}