期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 310, 期 -, 页码 278-296出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2016.06.033
关键词
Surface PDE; Laplace-Beltrami operator; Cut finite element method; Stabilization; Condition number; A priori error estimates
资金
- EPSRC, UK [EP/J002313/1]
- Swedish Foundation for Strategic Research [AM13-0029]
- Swedish Research Council [2011-4992, 2013-4708, 2014-4804]
- Swedish strategic research programme eSSENCE
- EPSRC [EP/J002313/1, EP/J002313/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J002313/1, EP/J002313/2] Funding Source: researchfish
We propose and analyze a new stabilized cut finite element method for the Laplace Beltrami operator on a closed surface. The new stabilization term provides control of the full R-3 gradient on the active mesh consisting of the elements that intersect the surface. Compared to face stabilization, based on controlling the jumps in the normal gradient across faces between elements in the active mesh, the full gradient stabilization is easier to implement and does not significantly increase the number of nonzero elements in the mass and stiffness matrices. The full gradient stabilization term may be combined with a variational formulation of the Laplace Beltrami operator based on tangential or full gradients and we present a simple and unified analysis that covers both cases. The full gradient stabilization term gives rise to a consistency error which, however, is of optimal order for piecewise linear elements, and we obtain optimal order a priori error estimates in the energy and L-2 norms as well as an optimal bound of the condition number. Finally, we present detailed numerical examples where we in particular study the sensitivity of the condition number and error on the stabilization parameter. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据