Higher-order discontinuous Galerkin time stepping and local projection stabilization techniques for the transient Stokes problem

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Contributors

Abstract

We introduce and analyze discontinuous Galerkin time discretizations coupled with continuous finite element methods based on equal-order interpolation in space for velocity and pressure in transient Stokes problems. Spatial stability of the pressure is ensured by adding a stabilization term based on local projection. We present error estimates for the semi-discrete problem after discretization in space only and for the fully discrete problem. The fully discrete pressure shows an instability in the limit of small time step length. Numerical tests are presented which confirm our theoretical results including the pressure instability.

Details

Original languageEnglish
Pages (from-to)28-52
Number of pages25
JournalComputer Methods in Applied Mechanics and Engineering
Volume313
Issue number1
Publication statusPublished - Jan 2017
Peer-reviewedYes

External IDs

Scopus 84992520598

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