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Publication 14-CNA-019

Second Order Asymptotic Development for the Anisotropic Cahn-Hilliard Functional

Gianni Dal Maso
SISSA
Via Bonomea 265
34136 Trieste, Italy

Irene Fonseca
Department of Mathematical Sciences
Carnegie Mellon University
Pittsburgh PA 15213-3890 USA

Giovanni Leoni
Department of Mathematical Sciences
Carnegie Mellon University
Pittsburgh PA 15213-3890 USA

Abstract: The asymptotic behavior of an anisotropic Cahn-Hilliard functional with prescribed mass and Dirichlet boundary condition is studied when the parameter $\epsilon$ that determines the width of the transition layers tends to zero. The double-well potential is assumed to be even and equal to $|s-1|^{\beta}$ near $s = 1$, with $1 < \beta < 2$. The first order term in the asymptotic development by $\Gamma$-convergence is well-known, and is related to a suitable anisotropic perimeter of the interface. Here it is shown that, under these assumptions, the second order term is zero, which gives an estimate on the rate of convergence of the minimum values.

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