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arXiv 1306.0305math.AP
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关于Navier-Stokes方程和Euler方程的渐近离散自相似解的注记

Remarks on the asymptotically discretely self-similar solutions of the Navier-Stokes and the Euler equations

Dongho Chae

摘要:

我们研究了不可压Navier-Stokes方程和Euler方程的自相似型爆破。将离散(后向)自相似解和渐近自相似解的概念推广到局部渐近离散自相似解。我们证明了对于三维斯托克斯方程,如果爆破轮廓是属于$C^1(\Bbb R ; L^3(\Bbb R^3)\cap C^2 (\Bbb R^3))$的时间周期函数,则不存在这种局部渐近离散自相似爆破.对于三维欧拉方程,我们表明,渐近离散自相似爆破的情况下,排除了爆破的轮廓满足适当的可积性条件。

英文摘要:

We study scenarios of self-similar type blow-up for the incompressible Navier-Stokes and the Euler equations. The previous notions of the discretely (backward) self-similar solution and the asymptotically self-similar solution are generalized to the locally asymptotically discretely self-similar solution. We prove that there exists no such locally asymptotically discretely self-similar blow-up for the 3D Navier-Stokes equations if the blow-up profile is a time periodic function belonging to $C^1(\Bbb R ; L^3(\Bbb R^3)\cap C^2 (\Bbb R^3))$. For the 3D Euler equations we show that the scenario of asymptotically discretely self-similar blow-up is excluded if the blow-up profile satisfies suitable integrability conditions.

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