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arXiv 1901.04263math.AP
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通过时空解耦的伪抛物系统的均匀化:穿孔域的尺度放大和校正估计

Homogenization of a pseudo-parabolic system via a spatial-temporal decoupling: upscaling and corrector estimates for perforated domains

Arthur Johannes Vromans, Fons van de Ven, Adrian Muntean

摘要:

在本文中,我们确定了尺度分离大小为$ε\ll 1$的含有漂移项的伪抛物系统的尺度放大的收敛速度。放大和收敛速度的确定都利用了自然的时空分解,将伪抛物系统分解为空间椭圆偏微分方程和时间常微分方程。我们将适用性扩展到空间-时域,其是空间域和时间域的产物,例如时间无关的穿孔空间域。最后,对于特殊情况下,我们显示收敛速度的全球时间,即$t \in \mathbf{R}_+$,通过使用时间间隔收敛到$\mathbf{R}_+$作为$ε\downarrow 0$。

英文摘要:

In this paper, we determine the convergence speed of an upscaling of a pseudo-parabolic system containing drift terms with scale separation of size $ε\ll 1$. Both the upscaling and convergence speed determination exploit a natural spatial-temporal decomposition, which splits the pseudo-parabolic system into a spatial elliptic partial differential equation and a temporal ordinary differential equation. We extend the applicability to space-time domains that are a product of spatial and temporal domains, such as a time-independent perforated spatial domain. Finally, for special cases we show convergence speeds for global times, i.e. $t \in \mathbf{R}_+$, by using time intervals that converge to $\mathbf{R}_+$ as $ε\downarrow 0$.

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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