The virtual element method on polygonal pixel-based tessellations

被引:0
|
作者
Bertoluzza, S. [1 ]
Montardini, M. [1 ,2 ]
Pennacchio, M. [1 ]
Prada, D. [1 ]
机构
[1] CNR, IMATI E Magenes, via Ferrata 5A, I-27100 Pavia, PV, Italy
[2] Univ Pavia, Dipartimento Matemat, via Ferrata 5, I-27100 Pavia, PV, Italy
关键词
Virtual element method; Polygonal approximating domain; Smooth boundary; Curved boundary; 2ND-ORDER ELLIPTIC PROBLEMS; STOKES PROBLEM; DOMAINS; VEM; FORMULATIONS; CONVERGENCE; EQUATIONS;
D O I
10.1016/j.jcp.2024.113334
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
We analyze and validate the virtual element method combined with a boundary correction similar to the one in [1,2], to solve problems on two dimensional domains with curved boundaries approximated by polygonal domains. We focus on the case of approximating domains obtained as the union of squared elements out of a uniform structured mesh, such as the one that naturally arises when the domain is issued from an image. We show, both theoretically and numerically, that resorting to polygonal elements allows the assumptions required for stability to be satisfied for any polynomial order. This allows us to fully exploit the potential of higher order methods. Efficiency is ensured by a novel static condensation strategy acting on the edges of the decomposition.
引用
收藏
页数:22
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