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arXiv 1902.05024math.AP
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一类Oldrox-B模型的Fujita-Kato定理

The Fujita-Kato Theorem for some Oldroyd-B model

Francesco De Anna, Marius Paicu

摘要:

本文研究一类Oldroyd型偏微分方程组的Cauchy问题。所考虑的模型描述了某些粘弹性流体的演化内的共转框架。非共转设置也解决了在第二维。我们证明了不可压Navier-斯托克斯方程的一些广泛的结果可以推广到所考虑的系统。特别地,我们证明了在二维大数据下,时间上的全局经典解的存在性和唯一性。这一结果得到了初始数据上的适当条件的支持,以提供流动的全球时间Lipschitz规律性,这使得能够克服由于主要强迫项的非时间衰减而带来的特定挑战。其次,我们解决了在维度大于或等于3时的时间上的全局适定性。我们证明了Lipschitz传播流。对于这个结果,我们只是假设初始数据在临界洛伦兹空间中足够小。

英文摘要:

In this paper, we investigate the Cauchy problem associated to a system of PDE's of Oldroyd type. The considered model describes the evolution of certain viscoelastic fluids within a corotational framework. The non-corotational setting is also addressed in dimension two. We show that some widespread results concerning the incompressible Navier-Stokes equations can be extended to the considered systems. In particular we show the existence and uniqueness of global-in-time classical solutions for large data in dimension two. This result is supported by suitable condition on the initial data to provide a global-in-time Lipschitz regularity for the flow, which allows to overcome specific challenging due to the non time decay of the main forcing terms. Secondly, we address the global-in-time well posedness in dimension larger or equal to three. We prove the propagation of Lipschitz regularities for the flow. For this result, we just assume the initial data to be sufficiently small in a critical Lorentz space.

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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