A divergence-free finite element method for the Stokes problem with boundary correction
Abstract
This paper constructs and analyzes a boundary correction finite element method for the Stokes problem based on the Scott-Vogelius pair on Clough-Tocher splits. The velocity space consists of continuous piecewise quadratic polynomials, and the pressure space consists of piecewise linear polynomials without continuity constraints. A Lagrange multiplier space that consists of continuous piecewise quadratic polynomials with respect to boundary partition is introduced to enforce boundary conditions as well as to mitigate the lack of pressure-robustness. We prove several inf-sup conditions, leading to the well-posedness of the method. In addition, we show that the method converges with optimal order and the velocity approximation is divergence free.
Cite
@article{arxiv.2105.10409,
title = {A divergence-free finite element method for the Stokes problem with boundary correction},
author = {Haoran Liu and Michael Neilan and Baris Otus},
journal= {arXiv preprint arXiv:2105.10409},
year = {2021}
}