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arXiv 1904.03311math.AP
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$3$ D对流Brinkman-Forchheimer方程正则性的鲁棒性

Robustness of Regularity for the $3$D Convective Brinkman-Forchheimer Equations

Karol W. Hajduk, James C. Robinson, Witold Sadowski

摘要:

本文证明了$3$ D对流Brinkman-Forchheimer方程$$ \partial_tu -μΔu + (u \cdot \nabla)u + \nabla p + αu + β\abs{u}^{r - 1}u = f, $$在吸收指数$r \in [1, 3]$的范围内正则性结果的稳健性(对于$r > 3$,存在时间上的整体正则解),即我们证明了这些方程的强解在初始条件和强迫函数足够小的变化下仍然是强的.我们提供了一个小性条件,该条件类似于Chernyshenko等人(2007)和Dashti & Robinson(2008)为$3$ D不可压缩Navier-斯托克斯方程给出的鲁棒性条件。

英文摘要:

We prove a robustness of regularity result for the $3$D convective Brinkman-Forchheimer equations $$ \partial_tu -μΔu + (u \cdot \nabla)u + \nabla p + αu + β\abs{u}^{r - 1}u = f, $$ for the range of the absorption exponent $r \in [1, 3]$ (for $r > 3$ there exist global-in-time regular solutions), i.e. we show that strong solutions of these equations remain strong under small enough changes of the initial condition and forcing function. We provide a smallness condition which is similar to the robustness conditions given for the $3$D incompressible Navier-Stokes equations by Chernyshenko et al. (2007) and Dashti & Robinson (2008).

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