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New Regularity Criteria Based on Pressure or Gradient of Velocity in Lorentz Spaces for the 3D Navier–Stokes Equations
Journal of Mathematical Fluid Mechanics ( IF 1.2 ) Pub Date : 2020-02-20 , DOI: 10.1007/s00021-019-0476-8
Xiang Ji , Yanqing Wang , Wei Wei

In this paper, we derive regular criteria via pressure or gradient of velocity in Lorentz spaces to the 3D Navier–Stokes equations. It is shown that a Leray–Hopf weak solution is regular on (0, T] provided that either the norm \(\Vert \Pi \Vert _{L^{p,\infty }(0,T; L ^{q,\infty }({\mathbb {R}}^{3}))} \) with \( \frac{2}{p}+\frac{3}{q}=2\) \((\frac{3}{2}<q<\infty )\) or \(\Vert \nabla \Pi \Vert _{L^{p,\infty }(0,T; L ^{q,\infty }({\mathbb {R}}^{3}))} \) with \( \frac{2}{p}+\frac{3}{q}=3\) \((1<q<\infty )\) is small. This gives an affirmative answer to a question proposed by Suzuki (Theory Methods Appl 75:3849–3853, 2012, Remark 2.4, p. 3850). Moreover, regular conditions in terms of \(\nabla u\) obtained here generalize known ones to allow the time direction to belong to Lorentz spaces.

中文翻译:

基于压力或速度梯度的Lorentz空间中3D Navier–Stokes方程的新规则性准则

在本文中,我们通过洛伦兹空间中的压力或速度梯度将常规准则推导出3D Navier–Stokes方程。结果表明,一个的Leray-的Hopf弱溶液是常规上(0,  Ť提供],要么常态\(\ Vert的\裨\ Vert的_ {L ^ {P,\ infty}(0,T; L ^ {Q ,\ infty}({\ mathbb {R}} ^ {3})}} \)\(\ frac {2} {p} + \ frac {3} {q} = 2 \) \((\ frac {3} {2} <q <\ infty} \)\(\ Vert \ nabla \ Pi \ Vert _ {L ^ {p,\ infty}(0,T; L ^ {q,\ infty}({ \ mathbb {R}} ^ {3})}}}}\(\ frac {2} {p} + \ frac {3} {q} = 3 \) \((1 <q <\ infty)\ )是小这给出了肯定的答案铃木(理论方法申请75提出了一个问题:。3849-3853,2012年,备注2.4,p 3850)。此外,在以下方面定期条件这里获得的\(\ nabla u \)归纳了已知的那些,以使时间方向属于Lorentz空间。
更新日期:2020-02-20
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