Large time behavior and stability for two-dimensional magneto-micropolar equations with partial dissipation. (English) Zbl 1529.35493
Summary: This paper is devoted to the stability and decay estimates of solutions to the two-dimensional magneto-micropolar fluid equations with partial dissipation. Firstly, focus on the 2D magneto-micropolar equation with only velocity dissipation and partial magnetic diffusion, we obtain the global existence of solutions with small initial in \(H^s({\mathbb{R}}^2)(s>1)\), and by fully exploiting the special structure of the system and using the Fourier splitting methods, we establish the large time decay rates of solutions. Secondly, when the magnetic field has partial dissipation, we show the global existence of solutions with small initial data in \(\dot{B}^0_{2,1}({\mathbb{R}}^2)\). In addition, we explore the decay rates of these global solutions are correspondingly established in \(\dot{B}^m_{2,1}({\mathbb{R}}^2)\) with \(0 \le m \le s\), when the initial data belongs to the negative Sobolev space \(\dot{H}^{-l}({\mathbb{R}}^2)\) (for each \(0 \le l <1)\).
MSC:
| 35Q60 | PDEs in connection with optics and electromagnetic theory |
| 82D40 | Statistical mechanics of magnetic materials |
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