An asymptotic analysis for a nonstandard Cahn-Hilliard system with viscosity

Details An asymptotic analysis for a nonstandard Cahn-Hilliard system with viscosity An asymptotic analysis for a nonstandard Cahn-Hilliard system with viscosity

2011-09-15

arxiv.org/abs/1109.3303v1

Mathematics

Analysis of PDEs

Key words: viscous Cahn-Hilliard system, phase field model, asymptotic limit, existence of solutions

Scientific paper

This paper is concerned with a diffusion model of phase-field type, consisting of a parabolic system of two partial differential equations, interpreted as balances of microforces and microenergy, for two unknowns: the problem's order parameter and the chemical potential; each equation includes a viscosity term and the field equations are complemented by Neumann homogeneous boundary conditions and suitable initial conditions. In the recent paper arXiv:1103.4585v1 [math.AP] we proved that this problem is well posed and investigated the long-time behavior of its solutions. Here we discuss the asymptotic limit of the system as the viscosity coefficient of the order parameter equation tends to 0. We prove convergence of solutions to the corresponding solutions for the limit problem, whose long-time behavior we characterize; in the proofs, we employ compactness and monotonicity arguments.

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