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arXiv 1205.5166math.AP
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阻尼wave equation解的整体存在性和收敛性

Global existence for a damped wave equation and convergence towards a solution of the Navier-Stokes problem

Imène Hachicha

摘要:

在二维和三维空间中,在适当的初值假设下,证明了一类阻尼波动方程解的整体存在性,在某种意义上,该方程逼近Navier-Stokes问题.证明是基于一个细化的能量方法。本文改进了Y.布雷尼耶河Natalini和M. Puel和M. Paicu和G.劳格尔我们放松了前者的初始数据的规律性,即使我们仍然使用能量方法作为主要工具。关于第二篇论文,改进在于简单的证明,因为我们不使用任何的Eschenhartz估计,并在需要较少的规律性收敛到Navier-Stokes问题。事实上,我们得到的收敛结果是近最优的正则性。

英文摘要:

In two and three space dimensions, and under suitable assumptions on the initial data, we show global existence for a damped wave equation which approaches, in some sense, the Navier-Stokes problem. The proofs are based on a refined energy method. In this paper, we improve the results in two papers by Y. Brenier, R. Natalini and M. Puel and by M. Paicu and G. Raugel. We relax the regularity of the initial data of the former, even though we still use energy methods as a principal tool. Regarding the second paper, the improvement consists in the simplicity of the proofs since we do not use any Strichartz estimate and in requiring less regularity for the convergence to the Navier-Stokes problem. Indeed, the convergence result we obtain is near-optimal regularity.

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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