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arXiv 1303.6352math.AP
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耦合抛物-椭圆模型解的存在唯一性及其在磁弛豫中的应用

Existence and uniqueness for a coupled parabolic-elliptic model with applications to magnetic relaxation

David S. McCormick, James C. Robinson, Jose L. Rodrigo

摘要:

我们证明了二维抛物-椭圆耦合模型的弱解的存在性、唯一性和正则性;我们考虑了从速度方程中去掉对流项的磁流体力学标准方程。尽管明显的简单的模型,证明需要的结果是在什么是可用的,包括椭圆规律$L^{1}$和加强形式的Ladyzhenskaya不等式\[ \| f \|_{L^{4}} \leq c \| f \|_{L^{2,\infty}}^{1/2} \| \nabla f \|_{L^{2}}^{1/2}, \],我们使用插值理论推导的限制。该模型具有应用程序的磁弛豫的方法,介绍了莫法特(J.流体。159,359-378,1985),以构造具有非平凡拓扑的静止欧拉流。

英文摘要:

We prove existence, uniqueness and regularity of weak solutions of a coupled parabolic-elliptic model in two dimensions; we consider the standard equations of magnetohydrodynamics with the advective terms removed from the velocity equation. Despite the apparent simplicity of the model, the proof requires results that are at the limit of what is available, including elliptic regularity in $L^{1}$ and a strengthened form of the Ladyzhenskaya inequality \[ \| f \|_{L^{4}} \leq c \| f \|_{L^{2,\infty}}^{1/2} \| \nabla f \|_{L^{2}}^{1/2}, \] which we derive using the theory of interpolation. The model has applications to the method of magnetic relaxation, introduced by Moffatt (J. Fluid. Mech. 159, 359-378, 1985), to construct stationary Euler flows with non-trivial topology.

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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