Higher-order discontinuous Galerkin time discretizations for the evolutionary Navier–Stokes equations. (27th August 2020)

• Record Type: Journal Article
• Authors: Ahmed, Naveed; Matthies, Gunar
• Is Part Of: IMA journal of numerical analysis. Volume 41:Number 4(2021)
• Page Start: 3113
• Page End: 3144
• Publication Date: 2020-08-27
• Subjects: evolutionary Navier–Stokes equations -- inf–sup stable finite elements -- local projection stabilization -- discontinuous Galerkin methods; Numerical analysis -- Periodicals; 519.405
• DOI: 10.1093/imanum/draa053
• Languages: English
• ISSNs: 0272-4979

Abstract

Abstract: Discontinuous Galerkin methods of higher order are applied as temporal discretizations for the transient Navier–Stokes equations. The spatial discretization based on inf–sup stable pairs of finite element spaces is stabilized using a one-level local projection stabilization method. Optimal error bounds for the velocity with constants independent of the viscosity parameter are obtained for both the semidiscrete case and the fully discrete case. Numerical results support the theoretical predictions.