Finite element approximation of Dirichlet control using boundary penalty method for unsteady Navier–Stokes equations
ESAIM: Mathematical Modelling and Numerical Analysis , Tome 51 (2017) no. 3, pp. 825-849.

This paper is concerned with the analysis of the finite element approximations of Dirichlet control problem using boundary penalty method for unsteady Navier–Stokes equations. Boundary penalty method has been used as a computationally convenient approach alternative to Dirichlet boundary control problems governed by Navier−Stokes equations due to its variational properties. Analysis of the mixed Galerkin finite element method applied to the spatial semi-discretization of the optimality system, from which optimal control can be computed, is presented. An optimal L (L 2 ) error estimate of the numerical approximations of the optimality system is derived. Feasibility and applicability of the approach are illustrated by numerically solving a canonical flow control problem.

Reçu le :
Accepté le :
DOI : 10.1051/m2an/2016040
Classification : 65M12, 93C20, 76B75, 49J20, 65M60, 93B40, 76D05
Mots clés : Boundary penalty method, Dirichlet boundary control, Navier–Stokes equations, optimal error estimates, mixed Galerkin finite element, adjoint equations
Ravindran, Sivaguru S. 1

1 Department of Mathematical Sciences, SST 201M, The University of Alabama in Huntsville, Huntsville, AL 35899, USA.
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     title = {Finite element approximation of {Dirichlet} control using boundary penalty method for unsteady {Navier{\textendash}Stokes} equations},
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Ravindran, Sivaguru S. Finite element approximation of Dirichlet control using boundary penalty method for unsteady Navier–Stokes equations. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 51 (2017) no. 3, pp. 825-849. doi : 10.1051/m2an/2016040. http://archive.numdam.org/articles/10.1051/m2an/2016040/

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