Forward self-similar solutions of the fractional Navier-Stokes equations

Forward self-similar solutions of the fractional Navier-Stokes equations
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分数维纳维-斯托克斯方程的正向自相似解

DOI:
10.1016/j.aim.2019.06.021
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发表时间:
2017-10
影响因子:
1.7
通讯作者:
Zheng Xiaoxin
Zheng Xiaoxin
中科院分区:
数学1区
文献类型:
--
作者:
Lai Baishun;Miao Changxing;Zheng Xiaoxin

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研究了具有分数阶扩散(−Δ)α)的三维N-S方程的正向自相似解。首先,对于任意大的自相似初值,我们利用所谓的Blow-up变元构造了分数阶N-S方程的5/6<α≤1的全局时间正向自相似解。此外,我们证明了该解在R3×(0,+∞)上是光滑的。特别地,当α=1时,通过建立相应椭圆组的解的正则性,我们证明了Korobkov和Tsai(2016)[16]构造的解满足衰减估计,这意味着该解与Jia和ŠVerák(2014)[13]构造的解具有相同的性质。
We study forward self-similar solutions to the 3-D Navier-Stokes equations with the fractional diffusion (− Δ) α. First, we construct a global-time forward self-similar solutions to the fractional Navier-Stokes equations with 5/6< α≤ 1 for arbitrarily large self-similar initial data by making use of the so called blow-up argument. Moreover, we prove that this solution is smooth in R 3×(0,+∞). In particular, when α= 1, we prove that the solution constructed by Korobkov and Tsai (2016)[16] satisfies the decay estimate by establishing regularity of solution for the corresponding elliptic system, which implies this solution has the same properties as a solution which was constructed in Jia and Šverák (2014)[13].
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