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arXiv 1902.09772math.AP
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一维凸标量粘性守恒律在周期扰动下激波和稀疏波的渐近稳定性

Asymptotic stability of shock profiles and rarefaction waves under periodic perturbations for 1-d convex scalar viscous conservation laws

Zhouping Xin, Qian Yuan, Yuan Yuan

摘要:

本文研究了一维凸标量粘性守恒律方程在空间周期扰动下激波和稀疏波的渐近稳定性。对于冲击配置文件,我们表明,解决方案接近背景冲击配置文件中的$ L^\infty(\mathbb{R}) $规范在指数速率的恒定移位。与定域微扰情况相比,新的现象是常数位移一般不能由初始过量质量决定,这表明无穷大处的周期振荡对这种位移有贡献。并给出了该位移的粘性消失极限。POOF的关键要素包括构造一个分别趋向于两个周期解的反导数($ x \rightarrow \pm\infty, $),反导数变量论证,以及最大值原理的精心使用。对于稀疏波,我们也证明了在$ L^\infty(\mathbb{R}) $范数下的稳定性。

英文摘要:

This paper studies the asymptotic stability of shock profiles and rarefaction waves under space-periodic perturbations for one-dimensional convex scalar viscous conservation laws. For the shock profile, we show that the solution approaches the background shock profile with a constant shift in the $ L^\infty(\mathbb{R}) $ norm at exponential rates. The new phenomena contrasting to the case of localized perturbations is that the constant shift cannot be determined by the initial excessive mass in general, which indicates that the periodic oscillations at infinities make contributions to this shift. And the vanishing viscosity limit for the shift is also shown. The key elements of the poof consist of the construction of an ansatz which tends to two periodic solutions as $ x \rightarrow \pm\infty, $ respectively, and the anti-derivative variable argument, and an elaborate use of the maximum principle. For the rarefaction wave, we also show the stability in the $ L^\infty(\mathbb{R}) $ norm.

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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