arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.3043math.NAcs.NAmath.DG
收藏

各向异性Willmore流的图形数值解

Numerical solution for the anisotropic Willmore flow of graphs

Czech Technical University in Prague(布拉格捷克理工大学)

Tomas Oberhuber

AI总结:

针对图形上的Willmore流,引入各向异性平均曲率,采用互补有限体积法进行数值求解,并证明了能量等式和稳定性。

摘要:

Willmore流是微分几何中的著名问题,它最小化定义为给定流形上平均曲率平方积分的Willmore泛函。对于图形公式,我们推导了具有各向异性平均曲率的Willmore流的修正。我们定义了弱解并证明了能量等式。我们通过互补有限体积法对解进行数值逼近。为了显示稳定性,我们以有限差分法重新表述了所得方案。通过使用简单的FDM框架,我们展示了能量等式的离散版本。时间离散化通过线方法完成,所得常微分方程组由具有自适应积分步长的Runge-Kutta-Merson求解器求解。我们还展示了实验收敛阶以及数值实验结果,针对几种不同的各向异性。

英文摘要:

The Willmore flow is well known problem from the differential geometry. It minimizes the Willmore functional defined as integral of the mean-curvature square over given manifold. For the graph formulation, we derive modification of the Willmore flow with anisotropic mean curvature. We define the weak solution and we prove an energy equality. We approximate the solution numerically by the complementary finite volume method. To show the stability, we re-formulate the resulting scheme in terms of the finite difference method. By using simple framework of FDM we show discrete version of the energy equality. The time discretization is done by the method of lines and the resulting system of ODEs is solved by the Runge-Kutta-Merson solver with adaptive integration step. We also show experimental order of convergence as well as results of the numerical experiments, both for several different anisotropies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑