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arXiv 2007.08838math.AP
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三维Navier-斯托克斯方程定常鞅解的局部标度律的充分条件

Sufficient conditions for local scaling laws for stationary martingale solutions to the 3D Navier-Stokes equations

Stavros Papathanasiou

摘要:

本文的主要目标是获得充分条件,使我们能够严格推导出当地版本的4/5和4/3法律的流体动力学湍流,我们的意思是这些法律的版本,在有界域。这是在稳态鞅解的Navier-斯托克斯方程驱动的一个Ornstein-Uhlenbeck过程。具体而言,我们表明,在\say{on average}预紧性的假设下,在$L^3,$的本地结构函数表示为一阶的长度尺度为非线性通量,在消失的粘度限制和适当的尺度范围内。如果另外假定局部能量相等,这就相当于用局部耗散来表示结构函数。我们的预紧性假设也表明,产生固定的鞅解的欧拉方程具有相同类型的强迫消失的粘度限制。

英文摘要:

The main goal of this paper is to obtain sufficient conditions that allow us to rigorously derive local versions of the 4/5 and 4/3 laws of hydrodynamic turbulence, by which we mean versions of these laws that hold in bounded domains. This is done in the context of stationary martingale solutions of the Navier-Stokes equations driven by an Ornstein-Uhlenbeck process. Specifically, we show that under an assumption of \say{on average} precompactness in $L^3,$ the local structure functions are expressed up to first order in the length scale as nonlinear fluxes, in the vanishing viscosity limit and within an appropriate range of scales. If in addition one assumes local energy equality, this is equivalent to expressing the structure functions in terms of the local dissipation. Our precompactness assumption is also shown to produce stationary martingale solutions of the Euler equations with the same type of forcing in the vanishing viscosity limit.

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