Interface estimates for the fully anisotropic Allen-Cahn equation and anisotropic mean curvature flow

Maurizio Paolini, Charles M. Elliott, Reiner Schätzle

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15 Citazioni (Scopus)

Abstract

In this paper, we prove that solutions of the anisotropic Allen-Cahn equation in double-obstacle form with kinetic term \begin{displaymath} \varepsilon \beta(\nabla \varphi) \partial_t \varphi - \varepsilon \nabla A'(\nabla \varphi) - \frac{1}{\varepsilon} \varphi = \frac{\pi}{4} u \quad \mbox{ in } [|\varphi| < 1], \end{displaymath} where $\ A\$ is a convex function, homogeneous of degree two, and $\ \beta\$ depends only on the direction of $\ \nabla \varphi\$, converge to an anisotropic mean-curvature flow \begin{displaymath} \beta(N) V_N = - \mbox{tr}(B(N) D^2 B(N) R) - B(N) u. \end{displaymath} Here $\ V_N \mbox{ and } R\$ respectively denote the normal velocity and the second fundamental form of the interface, and $\ B := \sqrt{2A}\$. We prove this in the case when the above flow admits a smooth solution, and we establish that the Hausdorff-distance between the zero-level set of $\ \varphi\$ and the interface of the flow is of order $\ O(\varepsilon^2)\$.
Lingua originale English 1103-1118 16 Mathematical Models and Methods in Applied Sciences Pubblicato - 1996

Keywords

• anisotropic allen-cahn equation
• anisotropic mean curvature flow
• double obstacle

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