Stability and sharp decay for 3D incompressible MHD system with fractional horizontal dissipation and magnetic diffusion
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK(2023)
摘要
This paper aims as the stability and large-time behavior of 3D incompressible magnetohydrodynamic (MHD) equations with fractional horizontal dissipation and magnetic diffusion. By using the energy methods, we obtain that if the initial data are small enough in H^3(ℝ^3) , then this system possesses a global solution, and whose horizontal derivatives decay at least at the rate of (1+t)^-1/2 . Moreover, if we control the initial data further small in H^3(ℝ^3)∩ H_h^-1(ℝ^3) , the sharp decay of this solution and its first-order derivatives is established.
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关键词
3D MHD,Fractional dissipation,Global solution,Large-time behavior
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