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arXiv 2208.04480math.AP
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三维有界大振荡真空区域中完全可压缩磁流体动力学系统的整体适定性

Global Well-Posedness of Full Compressible Magnetohydrodynamic System in 3D Bounded Domains with Large Oscillations and Vacuum

Yazhou Chen, Yunkun Chen, Xue Wang

摘要:

在一般有界区域中研究了三维可压缩磁流体动力学系统,速度场采用滑移边界条件,温度场采用绝热条件,磁场采用理想传导。对于具有小能量但可能大振荡的正则初值,得到了该方程组初边值问题经典解和弱解的整体存在性以及指数衰减率.特别地,允许这种经典解的密度和温度在初始时都为零。此外,还证明了对于经典解,当初始真空出现时(甚至在一点上),密度的振荡将以指数速率无界增长。一些新的意见和有用的估计,以克服所造成的困难,滑移边界条件。

英文摘要:

The three-dimensional (3D) full compressible magnetohydrodynamic system is studied in a general bounded domain with slip boundary condition for the velocity filed, adiabatic condition for the temperature and perfect conduction for the magnetic field. For the regular initial data with small energy but possibly large oscillations, the global existence of classical and weak solution as well as the exponential decay rate to the initial-boundary-value problem of this system is obtained. In particular, the density and temperature of such a classical solution are both allowed to vanish initially. Moreover, it is also shown that for the classical solutions, the oscillation of the density will grow unboundedly with an exponential rate when the initial vacuum appears (even at a point). Some new observations and useful estimates are developed to overcome the difficulties caused by the slip boundary conditions.

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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