Global large solutions to 3-D inhomogeneous Navier-Stokes system with one slow variable

Global large solutions to 3-D inhomogeneous Navier-Stokes system with one slow variable
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具有一个慢变量的 3-D 非齐次纳维-斯托克斯系统的全局大解

DOI:
10.1016/j.jde.2013.09.004
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发表时间:
2013-01
期刊:
J. Differential Equations
影响因子:
--
通讯作者:
Zhang, Ping
Zhang, Ping
中科院分区:
其他
文献类型:
--
作者:
Chemin, Jean-Yves;Paicu, Marius;Zhang, Ping

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在初始密度波动的各向同性临界Besov范数和初始速度水平分量的各向异性临界Besov范数的非线性小条件下(与初始速度第三分量的各向异性临界Besov范数相比必须呈指数级小),研究了临界Besov空间中三维非齐次不可压缩Navier-Stokes方程(1.2)的全局适态性。该结果的新颖之处在于,初始密度函数的非均匀性的各向同性空间结构与速度场的各向异性规律的传播是一致的。在第二部分中,我们运用同样的思想,用一些在一个方向上缓慢变化的大数据来证明(1.2)的全局适定性。
Under a nonlinear smallness condition on the isotropic critical Besov norm to the fluctuation of the initial density and the critical anisotropic Besov norm of the horizontal components of the initial velocity, which have to be exponentially small compared with the critical anisotropic Besov norm to the third component of the initial velocity, we investigate the global wellposedness of 3-D inhomogeneous incompressible Navier–Stokes equations (1.2) in the critical Besov spaces. The novelty of this results is that the isotropic space structure to the inhomogeneity of the initial density function is consistent with the propagation of anisotropic regularity for the velocity field. In the second part, we apply the same idea to prove the global wellposedness of (1.2) with some large data which are slowly varying in one direction.
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