A Reynolds-robust preconditioner for the Scott-Vogelius discretization of the stationary incompressible Navier-Stokes equations

Farrell, Patrick E.; Mitchell, Lawrence; Scott, L. Ridgway; Wechsung, Florian

Abstract

Augmented Lagrangian preconditioners have successfully yielded Reynolds-robust preconditioners for the stationary incompressible Navier–Stokes equations, but only for specific discretizations. The discretizations for which these preconditioners have been designed possess error estimates which depend on the Reynolds number, with the discretization error deteriorating as the Reynolds number is increased. In this paper we present an augmented Lagrangian preconditioner for the Scott–Vogelius discretization on barycentrically-refined meshes. This achieves both Reynolds-robust performance and Reynolds-robust error estimates. A key consideration is the design of a suitable space decomposition that captures the kernel of the grad-div term added to control the Schur complement; the same barycentric refinement that guarantees inf-sup stability also provides a local decomposition of the kernel of the divergence. The robustness of the scheme is confirmed by numerical experiments in two and three dimensions.

Citation

Farrell, P. E., Mitchell, L., Scott, L. R., & Wechsung, F. (2021). A Reynolds-robust preconditioner for the Scott-Vogelius discretization of the stationary incompressible Navier-Stokes equations. The SMAI journal of computational mathematics, 7, 75-96. https://doi.org/10.5802/smai-jcm.72

• Journal Article Type: Article
• Acceptance Date: Feb 2, 2021
• Online Publication Date: Mar 24, 2021
• Publication Date: 2021
• Deposit Date: May 20, 2020
• Publicly Available Date: Feb 18, 2021
• Journal: SMAI Journal of Computational Mathematics
• Electronic ISSN: 2426-8399
• Publisher: Centre Mersenne
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Pages: 75-96
• DOI: https://doi.org/10.5802/smai-jcm.72
• Public URL: https://durham-repository.worktribe.com/output/1270357
• Related Public URLs: https://arxiv.org/pdf/2004.09398.pdf