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arXiv 1502.04732math.AP
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微可压缩流体广义Forchheimer流的整体估计

Global Estimates for Generalized Forchheimer Flows of Slightly Compressible Fluids

Luan Hoang, Thinh Kieu

摘要:

本文研究多孔介质中可压缩流体的广义Forchheimer流动。它们被重新表述为一个退化的抛物型方程的压力。研究了含时Dirichlet边界条件下的初边值问题。对压力的$L^\infty$ -范数、压力梯度和时间导数导出了直到边界和所有时间的估计。大时间估计被建立为独立于初始数据。特别是由于压力的非线性方程的特殊结构,全局梯度估计以相对简单的方式获得,避免了复杂的计算和Hölder估计的先验要求。

英文摘要:

This paper is focused on the generalized Forchheimer flows of slightly compressible fluids in porous media. They are reformulated as a degenerate parabolic equation for the pressure. The initial boundary value problem is studied with time-dependent Dirichlet boundary data. The estimates up to the boundary and for all time are derived for the $L^\infty$-norm of the pressure, its gradient and time derivative. Large-time estimates are established to be independent of the initial data. Particularly, thanks to the special structure of the pressure's nonlinear equation, the global gradient estimates are obtained in a relatively simple way, avoiding complicated calculations and a prior requirement of Hölder estimates.

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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