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arXiv 2201.02825math.APmath-phmath.MP
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关于一般初值条件下从Boltzmann方程到Navier-Stokes-Fourier系统的收敛性

On the convergence from Boltzmann to Navier-Stokes-Fourier for general initial data

Pierre Gervais

AI总结:

本文针对速度变量多项式衰减的一般初值,证明Boltzmann方程强解收敛到不可压缩Navier-Stokes-Fourier系统,并通过将解分解为多项式衰减部分和高斯衰减部分,证明重标度Boltzmann方程的解在流体动力学极限爆破前不会爆破。

摘要:

在这项工作中,我们证明了对于速度变量具有多项式衰减的初值,Boltzmann方程的强解收敛到不可压缩Navier-Stokes-Fourier系统的解。我们特别证明了重新标度后的Boltzmann方程的解在其流体动力学极限发生爆破之前不会爆破。这一结果是通过采用M. Briant、S. Merino和C. Mouhot引入的一种策略实现的,即将Boltzmann方程的解写成一个具有多项式衰减的部分与一个具有高斯衰减的部分之和。高斯部分采用一种让人联想到I. Gallagher和I. Tristani所用方法的途径来处理。

英文摘要:

In this work, we prove the convergence of strong solutions of the Boltzman equation, for initial data having polynomial decay in the velocity variable, towards those of the incompressible Navier-Stokes-Fourier system. We show in particular that the solutions of the rescaled Boltzmann equation do not blow up before their hydrodynamic limit does. This is made possible by adapting a strategy introduced by M. Briant, S. Merino and C. Mouhot of writing the solution to the Boltzmann equation as the sum a part with polynomial decay and a second one with Gaussian decay. The Gaussian part is treated with an approach reminiscent of the one used by I. Gallagher and I. Tristani.

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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