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arXiv 2301.04737math.AP
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磁流体力学模型在外加压力下的正则性结果

Regularity results for a model in magnetohydrodynamics with imposed pressure

J. Poirier, N. Seloula

摘要:

磁流体动力学(MHD)问题的研究通常是在速度场上施加Dirichlet型边界条件的框架下进行的。本文研究具有压力边界条件的磁流体系统,速度和磁场切向迹均为零。在三维有界的可能多连通区域中,我们首先证明了Hilbert情形下弱解的存在性,然后利用这类边界条件下的Stokes问题和椭圆问题的正则性结果,证明了$W^{1,p}(Ω)$对$p\geq 2$的正则性和$W^{2,p}(Ω)$对$p\geq 6/5$的正则性.在小数据条件下,利用线性化(MHD)问题的不动点技巧,得到了$3/2<p<2$的$W^{1,p}(Ω)$解的存在唯一性.

英文摘要:

The magnetohydrodynamics (MHD) problem is most often studied in a framework where Dirichlet type boundary conditions on the velocity field is imposed. In this Note, we study the (MHD) system with pressure boundary condition, together with zero tangential trace for the velocity and the magnetic field. In a three-dimensional bounded possibly multiply connected domain, we first prove the existence of weak solutions in the Hilbert case, and later, the regularity in $W^{1,p}(Ω)$ for $p\geq 2$ and in $W^{2,p}(Ω)$ for $p\geq 6/5$ using the regularity results for some Stokes and elliptic problems with this type of boundary conditions. Furthermore, under the condition of small data, we obtain the existence and uniqueness of solutions in $W^{1,p}(Ω)$ for $3/2<p<2$ by using a fixed-point technique over a linearized (MHD) problem.

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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