A regularity criterion for 3D NSE in ‘dynamically restricted’ local Morrey spaces
A regularity criterion for 3D NSE in ‘dynamically restricted’ local Morrey spaces
复制标题
“动态限制”局部 Morrey 空间中 3D NSE 的规律性准则
DOI:
10.1080/00036811.2021.1906418
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发表时间:
2022
影响因子:
1.1
通讯作者:
Xu, Liaosha
中科院分区:
文献类型:
--
作者:
Grujić, Zoran;Xu, Liaosha
It is shown that a local-in-time strong solutionuto the 3D Navier–Stokes equations remains regular on an intervalprovided a smallness-condition onuin a dynamically restricted local Morrey space is stipulated; more precisely, supt∈(0,T)supx∈R3,η(t)≤r≤11rα∫Br(x)|u(y,t)|pdy≤ϵ0,whereηis a dynamic dissipation scale consistent with the turbulence phenomenology andαandpare suitable parameters. Such regularity criterion guarantees the volumetric sparseness of local spatial structure of intense vorticity components, preventing the formation of the finite-time blow up atTunder the framework of-sparseness classes introduced in Bradshaw et al. (An algebraic reduction of the ‘Scaling Gap’ in the Navier–Stokes regularity problem. Arch Ration Mech Anal. 2019;231(3):1983–2005).
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