📝 SummarXiv

Abstract

We investigate the long-time behavior of a nonlocal Cahn--Hilliard equation in a bounded domain $\Omega\subset\mathbb{R}^d$ $(d=2,3)$, subject to a kinetic rate dependent nonlocal dynamic boundary condition. The kinetic rate $1/L$, with $L\in[0,+\infty)$, distinguishes different types of bulk-surface interactions. When $L\in[0,+\infty)$, for a general class of singular potentials including the physically relevant logarithmic potential, we establish the existence of a global attractor $\mathcal{A}_m^L$ in a suitable complete metric space. Moreover, we verify that the global attractor $\mathcal{A}_m^0$ is stable with respect to perturbations $\mathcal{A}_m^L$ for small $L>0$. For the case $L\in(0,+\infty)$, based on the strict separation property of solutions, we prove the existence of exponential attractors through a short trajectory type technique, which also yields that the global attractor has finite fractal dimension. Finally, when $L\in(0,+\infty)$, by usage of a generalized {\L}ojasiewicz-Simon inequality and an Alikakos-Moser type iteration, we show that every global weak solution converges to a single equilibrium in $\mathcal{L}^\infty$ as time tends to infinity.