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arXiv 1807.02667math.AP
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三维Navier-Stokes方程斯托克斯方程的能量相等性

On the energy equality for the 3D Navier-Stokes equations

Luigi C. Berselli, Elisabetta Chiodaroli

摘要:

本文研究三维Navier-斯托克斯方程在Dirichlet边界条件下的初边值问题解的能量守恒问题。首先,我们考虑Leray-Hopf弱解,我们证明了一些新的准则,涉及到速度的梯度。接下来,我们将它们与现有文献中的缩放不变空间和Onsager猜想进行比较。然后,我们考虑了非常弱解的能量守恒问题,证明了属于所谓的Shinbrot类的分布解的能量相等性。这类经典的解决方案,这不是缩放不变的作用的一个可能的解释,也给出了。

英文摘要:

In this paper we study the problem of energy conservation for the solutions of the initial boundary value problem associated to the 3D Navier-Stokes equations, with Dirichlet boundary conditions. First, we consider Leray-Hopf weak solutions and we prove some new criteria, involving the gradient of the velocity. Next, we compare them with the existing literature in scaling invariant spaces and with the Onsager conjecture. Then, we consider the problem of energy conservation for very-weak solutions, proving energy equality for distributional solutions belonging to the so-called Shinbrot class. A possible explanation of the role of this classical class of solutions, which is not scaling invariant, is also given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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