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arXiv 2201.06822math.AP
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Lp框架下部分耗散双曲型方程组的整体存在性及松弛极限

Global existence for partially dissipative hyperbolic systems in the Lp framework, and relaxation limit

Timothée Crin-Barat, Raphaël Danchin

摘要:

本文在临界齐次Besov空间的框架下研究了一类部分耗散双曲型方程组的整体强解。我们的主要目标是将我们以前的论文[10]的分析扩展到一个函数框架,其中解的低频仅在p大于2的Lp型空间中有界。这使我们能够规定较弱的小性条件的整体适定性,并得到一个更准确的信息的定性性质的构造的解决方案。我们的存在性定理特别适用于具有松弛的多维等熵可压缩Euler方程组,并提供了与松弛因子无关的界。因此,我们证明严格的放松限制多孔介质方程,并表现出明确的收敛速度为适当的规范,一个全新的结果,以我们所知。

英文摘要:

Here we investigate global strong solutions for a class of partially dissipative hyperbolic systems in the framework of critical homogeneous Besov spaces. Our primary goal is to extend the analysis of our previous paper [10] to a functional framework where the low frequencies of the solution are only bounded in L p-type spaces with p larger than 2. This enables us to prescribe weaker smallness conditions for global well-posedness and to get a more accurate information on the qualitative properties of the constructed solutions. Our existence theorem in particular applies to the multi-dimensional isentropic compressible Euler system with relaxation, and provide us with bounds that are independent of the relaxation parameter. As a consequence, we justify rigorously the relaxation limit to the porous media equation and exhibit explicit rates of convergence for suitable norms, a completely new result to the best of our knowledge.

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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