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arXiv 1902.08642math.AP
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通过弯曲界面耦合的Darcy-Stokes系统的渐近分析

The asymptotic analysis of a Darcy-Stokes system coupled through a curved interface

Fernando A Morales

摘要:

本文研究了一个Darcy-Stokes系统的渐近分析,该系统模拟了窄通道(Stokes)和多孔介质(Darcy)之间通过$ C^{2} $弯曲界面耦合的流体交换。通道是界面($ Γ$)和它的平行移动($ Γ+ ε\, \boldsymbol{\widehat{e}}_{N} $)之间的圆柱形域。引入一个改变变量来固定域的几何形状,并引入两个坐标系:笛卡尔坐标系和一个局部坐标系(与表面的几何形状一致),当通道的宽度趋于零时($ ε\rightarrow 0 $),可以找到一个Darcy-Brinkman低维耦合系统作为极限形式。

英文摘要:

The asymptotic analysis of a Darcy-Stokes system modeling the fluid exchange between a narrow channel (Stokes) and a porous medium (Darcy) coupled through a $ C^{2} $ curved interface, is presented. The channel is a cylindrical domain between the interface ($ Γ$) and a parallel translation of it ($ Γ+ ε\, \boldsymbol{\widehat{e}}_{N} $). The introduction of a change variable to fix the domain's geometry and the introduction of two systems of coordinates: the Cartesian and a local one (consistent with the geometry of the surface), permit to find a Darcy-Brinkman lower dimensional coupled system as the limiting form, when the width of the channel tends to zero ($ ε\rightarrow 0 $).

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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