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arXiv math/0409310math.APmath-phmath.MPphysics.flu-dyn
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关于Navier-斯托克斯方程的一个拟线性模型的注记

Remarks on a quasi-linear model of the Navier-Stokes Equations

Fabian Waleffe

摘要:

Dinaburg和Sinai最近提出了Navier-斯托克斯方程的准线性模型。他们的模型假设傅立叶空间中的非局部相互作用占主导地位,与局部相互作用占主导地位的柯尔莫哥洛夫湍流现象相反。他们的方程对应于均匀梯度背景场上小尺度的线性演化,但后者被定义为所有小尺度梯度在原点的线性叠加。这不是自洽的。

英文摘要:

Dinaburg and Sinai recently proposed a quasi-linear model of the Navier-Stokes equations. Their model assumes that nonlocal interactions in Fourier space are dominant, contrary to the Kolmogorov turbulence phenomenology where local interactions prevail. Their equation corresponds to the linear evolution of small scales on a background field with uniform gradient, but the latter is defined as the linear superposition of all the small scale gradients at the origin. This is not self-consistent.

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