4.7 Article

A perturbation of the Cahn-Hilliard equation with logarithmic nonlinearity

期刊

JOURNAL OF DIFFERENTIAL EQUATIONS
卷 382, 期 -, 页码 50-76

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ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jde.2023.11.013

关键词

Cahn-Hilliard equation; Perturbation; Logarithmic nonlinear terms; Well-posedness; Strict separation property; Convergence to the Cahn-Hilliard equation

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The aim of this paper is to study a perturbation of the Cahn-Hilliard equation with nonlinear terms of logarithmic type. By proving the existence, regularity and uniqueness of solutions, as well as the (strong) separation properties of the solutions from the pure states, we finally demonstrate the convergence to the Cahn-Hilliard equation on finite time intervals.
Our aim in this paper is to study a perturbation of the Cahn-Hilliard equation with nonlinear terms of logarithmic type. This new model is based on an unconstrained theory recently proposed in [5]. We prove the existence, regularity and uniqueness of solutions, as well as (strong) separation properties of the solutions from the pure states, also in three space dimensions. We finally prove the convergence to the Cahn-Hilliard equation, on finite time intervals. (c) 2023 Elsevier Inc. All rights reserved.

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