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arXiv 2307.04410math.APmath-phmath.MP
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关于三维Euler方程能量守恒的三个结果

Three results on the Energy conservation for the 3D Euler equations

Luigi C. Berselli, Stefanos Georgiadis

AI总结:

该研究针对三维不可压缩均匀流体Euler方程的空间周期弱解能量守恒问题,拓展了Besov空间适用指数范围,复现了梯度条件下的相关结果,还给出了Onsager奇点问题中构造能量守恒弱解的条件。

摘要:

我们研究不可压缩均匀流体的三维Euler方程,探讨空间周期情形下弱解的能量守恒问题。首先,我们将部分经典结果推广到更宽的指数范围,证明了一整族Besov空间中的能量守恒性。其次,我们研究了带梯度条件情形下的能量守恒,复现了此前仅对Navier-Stokes方程及Leray-Hopf型弱解成立的部分结果。最后,我们对Onsager奇点问题作出若干评述,明确了可从Navier-Stokes方程解过渡到Euler方程解、构造出能量守恒弱解的条件。

英文摘要:

We consider the 3D Euler equations for incompressible homogeneous fluids and we study the problem of energy conservation for weak solutions in the space-periodic case. First, we prove the energy conservation for a full scale of Besov spaces, by extending some classical results to a wider range of exponents. Next, we consider the energy conservation in the case of conditions on the gradient, recovering some results which were known, up to now, only for the Navier-Stokes equations and for weak solutions of the Leray-Hopf type. Finally, we make some remarks on the Onsager singularity problem, identifying conditions which allow to pass to the limit from solutions of the Navier-Stokes equations to solution of the Euler ones, producing weak solutions which are energy conserving.

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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