arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1905.09720math.AP
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用涡方法得到的二维Euler方程的弱解是拉格朗日解,并且能量守恒

Weak solutions obtained by the vortex method for the 2D Euler equations are Lagrangian and conserve the energy

Gennaro Ciampa, Gianluca Crippa, Stefano Spirito

摘要:

讨论了二维不可压Euler方程解的拉格朗日性质和动能守恒。当初始涡量在$L^p$中时,已知拉格朗日解的存在性,其中$1\leq p\leq \infty$。而且,若$p\geq 3/2$,则所有的弱解都是保守的.在这项工作中,我们证明了通过涡方法得到的解决方案是拉格朗日,他们是保守的,如果$p>1$。

英文摘要:

We discuss the Lagrangian property and the conservation of the kinetic energy for solutions of the 2D incompressible Euler equations. Existence of Lagrangian solutions is known when the initial vorticity is in $L^p$ with $1\leq p\leq \infty$. Moreover, if $p\geq 3/2$ all weak solutions are conservative. In this work we prove that solutions obtained via the vortex method are Lagrangian, and that they are conservative if $p>1$.

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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