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arXiv 2002.10531math.AP
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MHD方程在加权$L^2$空间中的弱-强唯一性和局部Morrey空间中的弱适合解

Weak-strong uniqueness in weighted $L^2$ spaces and weak suitable solutions in local Morrey spaces for the MHD equations

Pedro Gabriel Fernández-Dalgo, Oscar Jarrín

摘要:

我们考虑在这里的磁流体动力学(MHD)方程的整个空间。对于三维情形,在加权$L^2$空间中,只要速度场和磁场属于一个相当一般的乘子空间,我们就得到了一个弱-强唯一性准则.另一方面,我们研究了间断初值下弱合适解的局部和整体存在性,并通过局部Morrey空间刻画了弱合适解的存在性。在3D Navier-斯托克斯方程的背景下,这个大的初始数据空间也在当代工作[4]中展示。最后,我们讨论了二维情形下的局部和整体存在性问题。

英文摘要:

We consider here the magneto-hydrodynamics (MHD) equations on the whole space. For the 3D case, in the setting of the weighted $L^2$ spaces we obtain a weak-strong uniqueness criterion provided that the velocity field and the magnetic field belong to a fairly general multipliers space. On the other hand, we study the local and global existence of weak suitable solutions for intermittent initial data, which is characterized through a local Morrey space. This large initial data space was also exhibit in a contemporary work [4] in the context of 3D Navier-Stokes equations. Finally, we make a discussion on the local and global existence problem in the 2D case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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