Continuous interior penalty stabilization for divergence-free finite element methods

Barrenechea, Gabriel R.; Burman, Erik; Cáceres, Ernesto; Guzman, Johnny

Abstract

In this paper, we propose, analyze and test numerically a pressure-robust stabilized finite element for a linearized problem in incompressible fluid mechanics, namely, the steady Oseen equation with low viscosity. Stabilization terms are defined by jumps of different combinations of derivatives for the convective term over the element faces of the triangulation of the domain. With the help of these stabilizing terms, and the fact the finite element space is assumed to provide a point-wise divergence-free velocity, an O(h^{k+0.5}) error estimate in the L^2-norm is proved for the method (in the convection-dominated regime), and optimal order estimates in the remaining norms of the error. Numerical results supporting the theoretical findings are provided.

Más información

Título de la Revista: IMA JOURNAL OF NUMERICAL ANALYSIS
Editorial: OXFORD UNIV PRESS
Fecha de publicación: 2023
Idioma: Inglés
URL: https://academic.oup.com/imajna/advance-article-abstract/doi/10.1093/imanum/drad030/7179402
DOI:

https://doi.org/10.1093/imanum/drad030