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A Structure-Preserving Numerical Method for the Fourth-Order Geometric Evolution Equations for Planar Curves
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作者 Eiji Miyazaki Tomoya Kemmochi +1 位作者 tomohiro sogabe Shao-Liang Zhang 《Communications in Mathematical Research》 CSCD 2023年第2期296-330,共35页
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 s... 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. 展开更多
关键词 Geometric evolution equation Willmore flow Helfrich flow numerical calculation structure-preserving discrete variational derivative method tangential velocity
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