A penalty method for the time-dependent Stokes problem with the slip boundary condition and its finite element approximation

Guanyu Zhou, Takahito Kashiwabara, Issei Oikawa

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Abstract

We consider the finite element method for the time-dependent Stokes problem with the slip boundary condition in a smooth domain. To avoid a variational crime of numerical computation, a penalty method is introduced, which also facilitates the numerical implementation. For the continuous problem, the convergence of the penalty method is investigated. Then we study the fully discretized finite element approximations for the penalty method with the P1/P1-stabilization or P1b/P1 element. For the discretization of the penalty term, we propose reduced and non-reduced integration schemes, and obtain an error estimate for velocity and pressure. The theoretical results are verified by numerical experiments.

Original languageEnglish
Pages (from-to)377-403
Number of pages27
JournalApplications of Mathematics
Volume62
Issue number4
DOIs
Publication statusPublished - 2017 Aug 1

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Keywords

  • error estimate
  • finite element method
  • penalty method
  • Stokes problem

ASJC Scopus subject areas

  • Applied Mathematics

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