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arXiv 1401.3679math.AP
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Navier-Stokes系统中的不定常奇异性

Time-dependent singularities in the Navier-Stokes system

Grzegorz Karch, Xiaoxin Zheng

摘要:

我们证明了对于$\{(γ(t),t)\,:\, t>0\} \subset R^3\times R^+$中给定的Hölder连续曲线,$R^3$中不可压缩流体的Navier-Stokes方程组存在一个解,该解在曲线外是光滑的,在曲线上是奇异的,这是曲线外方程组的逐点解,但作为$R^3\times R^+$上的分布解,它解一个奇异力集中在曲线上的类似Navier-Stokes方程组.

英文摘要:

We show that, for a given Hölder continuous curve in $\{(γ(t),t)\,:\, t>0\} \subset R^3\times R^+$, there exists a solution to the Navier-Stokes system for an incompressible fluid in $R^3$ which is smooth outside this curve and singular on it. This is a pointwise solution of the system outside the curve, however, as a distributional solution on $R^3\times R^+$, it solves an analogous Navier-Stokes system with a singular force concentrated on the curve.

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