A Structure-Preserving Numerical Method for the Fourth-Order Geometric Evolution Equations for Planar Curves
Year: 2023
Author: Eiji Miyazaki, Tomoya Kemmochi, Tomohiro Sogabe, Shao-Liang Zhang
Communications in Mathematical Research , Vol. 39 (2023), Iss. 2 : pp. 296–330
Abstract
For fourth-order geometric evolution equations for planar curves with the dissipation of the bending energy, including the Willmore and the Helfrich flows, we consider a numerical approach. In this study, we construct a structure-preserving method based on a discrete variational derivative method. Furthermore, to prevent the vertex concentration that may lead to numerical instability, we discretely introduce Deckelnick’s tangential velocity. Here, a modification term is introduced in the process of adding tangential velocity. This modified term enables the method to reproduce the equations’ properties while preventing vertex concentration. Numerical experiments demonstrate that the proposed approach captures the equations’ properties with high accuracy and avoids the concentration of vertices.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/cmr.2022-0040
Communications in Mathematical Research , Vol. 39 (2023), Iss. 2 : pp. 296–330
Published online: 2023-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 35
Keywords: Geometric evolution equation Willmore flow Helfrich flow numerical calculation structure-preserving discrete variational derivative method tangential velocity.