arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1809.04451math.AP
收藏

具有密度依赖粘性和退化导热系数的磁流体力学的整体强解

Global Strong Solutions to Magnetohydrodynamics with Density-Dependent Viscosity and Degenerate Heat-Conductivity

Bin Huang, Xiaoding Shi, Ying Sun

摘要:

我们处理的平面磁流体动力学可压缩流的方程组的粘度依赖于气体的比容和导热系数成正比的温度的正幂。在与常粘性和热传导率情形相同的初始条件下([Kazhikhov(1987)]),我们得到了整体强解的存在唯一性,这意味着在有限时间内不会产生激波、真空、质量或热量集中,尽管流动的运动有很大的振荡,流体动力学效应和磁动力学效应之间的相互作用是复杂的。我们的结果可以被看作是Kazhikhov的理论的一个自然的推广的常粘度和热传导的情况下,非线性粘度和退化的热传导。

英文摘要:

We deal with the equations of a planar magnetohydrodynamic compressible flow with the viscosity depending on the specific volume of the gas and the heat conductivity proportional to a positive power of the temperature. Under the same conditions on the initial data as those of the constant viscosity and heat conductivity case ([Kazhikhov (1987)], we obtain the global existence and uniqueness of strong solutions which means no shock wave, vacuum, or mass or heat concentration will be developed in finite time, although the motion of the flow has large oscillations and the interaction between the hydrodynamic and magnetodynamic effects is complex. Our result can be regarded as a natural generalization of the Kazhikhov's theory for the constant viscosity and heat conductivity case to that of nonlinear viscosity and degenerate heat-conductivity.

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。

↑