Decay rates for the viscous incompressible MHD equations with and without surface tension

Decay rates for the viscous incompressible MHD equations with and without surface tension
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有和没有表面张力的粘性不可压缩 MHD 方程的衰减率

DOI:
10.1016/j.camwa.2019.02.008
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发表时间:
2019-06
影响因子:
2.9
通讯作者:
Guoxi Ni
Guoxi Ni
中科院分区:
数学2区
文献类型:
--
作者:
Boling Guo;Lan Zeng;Guoxi Ni

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在本文中,我们考虑一层粘性不可压缩导电流体与水平周期性设置中的磁场相互作用。上边界由自由边界界定,下边界由平坦刚性界面界定。我们证明了在有表面张力和没有表面张力的情况下该问题的全局适定性。此外,我们表明,在有表面张力的情况下,全局解以指数速率衰减到平衡,而在没有表面张力的情况下,全局解以几乎指数的速率衰减到平衡。
In this paper, we consider a layer of a viscous incompressible electrically conducting fluid interacting with the magnetic field in a horizontally periodic setting. The upper boundary is bounded by a free boundary and below bounded by a flat rigid interface. We prove the global well-posedness of the problem for both the case with and without surface tension. Moreover, we show that the global solution decays to the equilibrium exponentially in the case with surface tension, however the global solution decays to the equilibrium at an almost exponential rate in the case without surface tension.
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