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arXiv 1807.04044math.AP
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用相对熵方法求解不可压Navier-斯托克斯方程的矢量BGK模型的Strong convergence

Strong convergence of a vector-BGK model to the incompressible Navier-Stokes equations via the relative entropy method

Roberta Bianchini

摘要:

本文的目的是证明二维环面上不可压Navier-斯托克斯方程在扩散标度下的向量BGK模型解的强收敛性。该结果在任何时间间隔$[0, T]$中均成立,其中$T>0$。我们还提供了近似系统的解的时间一致有界性。我们的论点是基于使用本地的时间$H^s$ -估计的模型,建立在以前的工作,结合$L^2$ -相对熵估计和插值性质的索伯列夫空间。

英文摘要:

The aim of this paper is to prove the strong convergence of the solutions to a vector-BGK model under the diffusive scaling to the incompressible Navier-Stokes equations on the two-dimensional torus. This result holds in any interval of time $[0, T]$, with $T>0$. We also provide the global in time uniform boundedness of the solutions to the approximating system. Our argument is based on the use of local in time $H^s$-estimates for the model, established in a previous work, combined with the $L^2$-relative entropy estimate and the interpolation properties of the Sobolev spaces.

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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