Energy-stable parametric finite element approximations for regularized solid-state dewetting in strongly anisotropic materials
Abstract
In this work, we aim to develop energy-stable parametric finite element approximations for a sharp-interface model with strong surface energy anisotropy, which is derived from the first variation of an energy functional composed of film/vapor interfacial energy, substrate energy, and regularized Willmore energy. By introducing two geometric relations, we innovatively establish an equivalent regularized sharp-interface model and further construct an energy-stable parametric finite element algorithm for this equivalent model. We provide a detailed proof of the energy stability of the numerical scheme, addressing a gap in the relevant theory. Additionally, we develop another structure-preserving parametric finite element scheme that can preserve both area conservation and energy stability. Finally, we present several numerical simulations to show accuracy and efficiency as well as some structure-preserving properties of the proposed numerical methods. More importantly, extensive numerical simulations reveal that our schemes provide better mesh quality and are more suitable for long-term computations.
Keywords
Cite
@article{arxiv.2407.04524,
title = {Energy-stable parametric finite element approximations for regularized solid-state dewetting in strongly anisotropic materials},
author = {Meng Li and Chunjie Zhou},
journal= {arXiv preprint arXiv:2407.04524},
year = {2024}
}