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arXiv math/0603126math.AP
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三维不可压Navier-斯托克斯方程局部自相似爆破的不存在性

Nonexistence of Local Self-Similar Blow-up for the 3D Incompressible Navier-Stokes Equations

Thomas Y. Hou, Ruo Li

摘要:

证明了三维不可压Navier-斯托克斯方程的局部自相似解的不存在性。我们考虑的局部自相似解不同于全局自相似解。自相似标度仅在内核区域中有效,该内核区域随着时间$t$接近奇异时间$T$而动态地收缩到一个点。假设内核区域外的解是正则的。在局部自相似速度剖面收敛于$L^p$中的$t \to T$极限剖面的假设下,证明了对于某些$p \in (3,\infty)$,这种局部自相似爆破在有限时间内是不可能的.

英文摘要:

We prove the nonexistence of local self-similar solutions of the three dimensional incompressible Navier-Stokes equations. The local self-similar solutions we consider here are different from the global self-similar solutions. The self-similar scaling is only valid in an inner core region which shrinks to a point dynamically as the time, $t$, approaches the singularity time, $T$. The solution outside the inner core region is assumed to be regular. Under the assumption that the local self-similar velocity profile converges to a limiting profile as $t \to T$ in $L^p$ for some $p \in (3,\infty)$, we prove that such local self-similar blow-up is not possible for any finite time.

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