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arXiv 1912.04429math.AP
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三维可压缩Euler方程点激波的形成

Formation of point shocks for 3D compressible Euler

Tristan Buckmaster, Steve Shkoller, Vlad Vicol

摘要:

考虑了三维等熵可压缩欧拉方程组的理想气体定律。我们提供了一个建设性的证明冲击形成从光滑的初始数据的有限能量,没有真空区,与非平凡的涡量存在于冲击,并在没有对称性的假设。我们证明了对于Sobolev类初值的开集,当初值是一个常数的小的$L^ \infty $扰动时,存在Euler方程的光滑解,该光滑解在有限时间内形成一般的稳定激波.爆破时间和位置可以显式计算,并且爆破时间的解是光滑的,除了单个点,它们是具有Hölder $C^ {\frac{1}{3}}$正则性的尖点型。我们的证明是基于使用调制的自相似变量,用于执行一些约束的爆破配置文件,必要的建立稳定的自相似变量的通用冲击配置文件。

英文摘要:

We consider the 3D isentropic compressible Euler equations with the ideal gas law. We provide a constructive proof of shock formation from smooth initial datum of finite energy, with no vacuum regions, with nontrivial vorticity present at the shock, and under no symmetry assumptions. We prove that for an open set of Sobolev-class initial data which are a small $L^ \infty $ perturbation of a constant state, there exist smooth solutions to the Euler equations which form a generic stable shock in finite time. The blow up time and location can be explicitly computed, and solutions at the blow up time are smooth except for a single point, where they are of cusp-type with Hölder $C^ {\frac{1}{3}}$ regularity. Our proof is based on the use of modulated self-similar variables that are used to enforce a number of constraints on the blow up profile, necessary to establish the stability in self-similar variables of the generic shock profile.

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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