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arXiv 2107.07079math.AP
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$\mathbb{R}^3$中无粘Oldrophil-B模型的Cauchy问题

The Cauchy problem for an inviscid Oldroyd-B model in $\mathbb{R}^3$

Sili Liu, Wenjun Wang, Huanyao Wen

摘要:

本文考虑三维无粘可压缩Oldroplast-B模型的Cauchy问题。在平衡态附近建立了索伯列夫空间中强解的整体适定性和相应的时间衰减估计。与我们以前的工作[47]相比,粘度的消失是主要的挑战,其中包括粘度系数,并且解决方案的最高阶导数的衰减率似乎不是最佳的。本文的主要目的之一是发展一些新的耗散估计,使初始数据的小和衰减率是独立的粘度。此外,证明了解的最高阶导数的衰减率是最优的。我们的证明依赖于傅立叶理论和精细的能量方法。这一工作可以看作是[47]的扩展。

英文摘要:

In this paper, we consider the Cauchy problem for an inviscid compressible Oldroyd-B model in three dimensions. The global well posedness of strong solutions and the associated time-decay estimates in Sobolev spaces are established near an equilibrium state. The vanishing of viscosity is the main challenge compared with our previous work [47] where the viscosity coefficients are included and the decay rates for the highest-order derivatives of the solutions seem not optimal. One of the main objectives of this paper is to develop some new dissipative estimates such that the smallness of the initial data and decay rates are independent of the viscosity. In addition, it proves that the decay rates for the highest-order derivatives of the solutions are optimal. Our proof relies on Fourier theory and delicate energy method. This work can be viewed as an extension of [47].

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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