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arXiv 2208.09445math.APmath-phmath.MP
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三维可压缩流体的光滑内爆解

Smooth imploding solutions for 3D compressible fluids

Tristan Buckmaster, Gonzalo Cao-Labora, Javier Gómez-Serrano

AI总结:

基于先前工作,为三维等熵可压缩欧拉方程构造所有绝热指数大于1的光滑自相似内爆解,并针对γ=7/5情形证明序列存在性及简化稳定性证明,进而构造纳维-斯托克斯方程的渐近自相似内爆解,首次展示此类奇点形成。

摘要:

在开创性工作[Merle, Raphaël, Rodnianski, 和 Szeftel, Ann. of Math., 196(2):567-778, 2022, Ann. of Math., 196(2):779-889, 2022, Invent. Math., 227(1):247-413, 2022]的基础上,我们为所有绝热指数$\gamma>1$的理想气体构造了三维等熵可压缩欧拉方程的精确、光滑自相似内爆解。对于特殊情况$\gamma=\frac75$(对应于双原子气体,如氧气、氢气、氮气),与先前结果类似,我们证明了存在一列光滑的自相似内爆解。此外,我们提供了线性稳定性和非线性稳定性的简化证明,这使得我们能够为$\gamma=\frac75$的情况构造具有密度无关黏性的可压缩纳维-斯托克斯方程的渐近自相似内爆解。而且,所构造的解的密度远离零,并在无穷远处收敛到常数,代表了此类设置中奇点形成的第一个例子。

英文摘要:

Building upon the pioneering work [Merle, Raphaël, Rodnianski, and Szeftel, Ann. of Math., 196(2):567-778, 2022, Ann. of Math., 196(2):779-889, 2022, Invent. Math., 227(1):247-413, 2022] we construct exact, smooth self-similar imploding solutions to the 3D isentropic compressible Euler equations for ideal gases for all adiabatic exponents $γ>1$. For the particular case $γ=\frac75$ (corresponding to a diatomic gas, e.g. oxygen, hydrogen, nitrogen), akin to the previous result, we show the existence of a sequence of smooth, self-similar imploding solutions. In addition, we provide simplified proofs of linear stability and non-linear stability, which allow us to construct asymptotically self-similar imploding solutions to the compressible Navier-Stokes equations with density independent viscosity for the case $γ=\frac75$. Moreover, the solutions constructed have density bounded away from zero and converge to a constant at infinity, representing the first example of singularity formation in such a setting.

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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