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arXiv 2102.10057math.AP
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对流Allen-Cahn方程解的(不)收敛性

(Non-)Convergence of Solutions of the Convective Allen-Cahn Equation

Helmut Abels

摘要:

我们考虑对流Allen-Cahn方程的尖锐界面极限,它可以是Navier-Stokes/Allen-Cahn系统的一部分,对于不同的迁移率标度$m_\varepsilon=m_0\varepsilon^θ$为$\varepsilon\to 0$。在$θ>2$的情况下,我们显示了一个(非)收敛的结果,在这个意义上,浓度收敛到一个传输方程的解决方案,但他们不像在正常方向上的界面的情况下$θ=0$的重新缩放的最佳配置文件。此外,我们表明,相关的中曲率功能不收敛于相应的功能的尖锐接口。最后,我们用形式匹配渐近法讨论了$θ=0,1$情形下的收敛性。

英文摘要:

We consider the sharp interface limit of a convective Allen-Cahn equation, which can be part of a Navier-Stokes/Allen-Cahn system, for different scalings of the mobility $m_\varepsilon=m_0\varepsilon^θ$ as $\varepsilon\to 0$. In the case $θ>2$ we show a (non-)convergence result in the sense that the concentrations converge to the solution of a transport equation, but they do not behave like a rescaled optimal profile in normal direction to the interface as in the case $θ=0$. Moreover, we show that an associated mean curvature functional does not converge the corresponding functional for the sharp interface. Finally, we discuss the convergence in the case $θ=0,1$ by the method of formally matched asymptotics.

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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