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arXiv 1701.00992math.AP
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多孔介质中的粘性驱替:二维Muskat问题

Viscous displacement in porous media: the Muskat problem in 2D

Bogdan-Vasile Matioc

摘要:

本文考虑了描述无界二维多孔介质或Hele-Shaw胞元中两相流体系统粘性位移的Muskat问题。在制定的数学模型作为一个演化问题的尖锐的界面之间的流体,我们表明,Muskat问题与表面张力是一个准线性抛物型问题,而在没有表面张力的影响,瑞利-泰勒条件确定的完全非线性问题的抛物域。基于这些方面,我们然后建立局部适定性任意大的初始数据在$H^s$,$s>2$,如果考虑表面张力,分别为任意大的初始数据在$H^2$,另外满足瑞利-泰勒条件,如果忽略表面张力的影响。我们还表明,该问题表现出的抛物线平滑效果,我们提供的整体存在的解决方案的标准。

英文摘要:

We consider the Muskat problem describing the viscous displacement in a two-phase fluid system located in an unbounded two-dimensional porous medium or Hele-Shaw cell. After formulating the mathematical model as an evolution problem for the sharp interface between the fluids, we show that Muskat problem with surface tension is a quasilinear parabolic problem, whereas, in the absence of surface tension effects, the Rayleigh-Taylor condition identifies a domain of parabolicity for the fully nonlinear problem. Based upon these aspects, we then establish the local well-posedness for arbitrary large initial data in $H^s$, $s>2$, if surface tension is taken into account, respectively for arbitrary large initial data in $H^2$ that additionally satisfy the Rayleigh-Taylor condition if surface tension effects are neglected. We also show that the problem exhibits the parabolic smoothing effect and we provide criteria for the global existence of solutions.

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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