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arXiv 0902.3625math.AP
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质量守恒的Allen-Cahn方程与保体积中曲率流

Mass conserved Allen-Cahn equation and volume preserving mean curvature flow

Xinfu Chen, Danielle Hilhorst, Elisabeth Logak

摘要:

考虑有界域上无通量边界条件的质量守恒Allen-Cahn方程$u_t=Δu+ \e^{-2} (f(u)-\eλ(t))$,其中$\eλ(t)$是$f(u(\cdot,t))$的平均值,$-f$是双等势阱的导数。给定一个光滑的超曲面$γ_0$包含在域中,我们表明,解决方案$u^\e$与适当的初始数据的方法,作为$\e\searrow0$,到一个极限,它只需要两个值,与跳跃发生在超曲面从体积保持中曲率流从$γ_0$。

英文摘要:

We consider a mass conserved Allen-Cahn equation $u_t=Δu+ \e^{-2} (f(u)-\eλ(t))$ in a bounded domain with no flux boundary condition, where $\eλ(t)$ is the average of $f(u(\cdot,t))$ and $-f$ is the derivative of a double equal well potential. Given a smooth hypersurface $γ_0$ contained in the domain, we show that the solution $u^\e$ with appropriate initial data approaches, as $\e\searrow0$, to a limit which takes only two values, with the jump occurring at the hypersurface obtained from the volume preserving mean curvature flow starting from $γ_0$.

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