Least-squares driven stabilised finite element solution of advection-dominated flow problems
Abstract
In this article, we address the solution of advection-dominated flow problems by stabilised methods, by means of least-squares computed stabilised coefficients. As main methodological tool, we introduce a data-driven off-line/on-line strategy to compute them with low computational cost. We compare the errors provided by the least-squares stabilised coefficients to those provided by several previously established stabilised coefficients within the solution of advection-diffusion and Navier-Stokes flows, on structured and un-structured grids, with and Lagrange Finite Elements up to third degree of interpolation. In all tested flows the least-squares stabilised coefficients provide quasi-optimal errors. We conclude that the least-squares procedure is a rewarding procedure, worth to be applied to general stabilised solutions of general flow problems.
Cite
@article{arxiv.2207.13778,
title = {Least-squares driven stabilised finite element solution of advection-dominated flow problems},
author = {Tomás Chacón Rebollo and Daniel Franco Coronil},
journal= {arXiv preprint arXiv:2207.13778},
year = {2022}
}