We consider an unconstrained tangential Dirichlet boundary control problem for the Stokes equations with an L2 penalty on the boundary control. The contribution of this paper is twofold. First, we obtain well-posedness and regularity results for the tangential Dirichlet control problem on a convex polygonal domain. The analysis contains new features not found in similar Dirichlet control problems for the Poisson equation; an interesting result is that the optimal control has higher local regularity on the individual edges of the domain compared to the global regularity on the entire boundary. Second, we propose and analyze a hybridizable discontinuous Galerkin (HDG) method to approximate the solution. For convex polygonal domains, our theoretical convergence rate for the control is optimal with respect to the global regularity on the entire boundary. We present numerical experiments to demonstrate the performance of the HDG method.
Mots-clés : Tangential Dirichlet boundary control, Stokes equations, hybridizable discontinuous Galerkin method
@article{M2AN_2020__54_6_2229_0, author = {Gong, Wei and Hu, Weiwei and Mateos, Mariano and Singler, John R. and Zhang, Yangwen}, title = {Analysis of a hybridizable discontinuous {Galerkin} scheme for the tangential control of the {Stokes} system}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis }, pages = {2229--2264}, publisher = {EDP-Sciences}, volume = {54}, number = {6}, year = {2020}, doi = {10.1051/m2an/2020015}, language = {en}, url = {http://www.numdam.org/articles/10.1051/m2an/2020015/} }
TY - JOUR AU - Gong, Wei AU - Hu, Weiwei AU - Mateos, Mariano AU - Singler, John R. AU - Zhang, Yangwen TI - Analysis of a hybridizable discontinuous Galerkin scheme for the tangential control of the Stokes system JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2020 SP - 2229 EP - 2264 VL - 54 IS - 6 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an/2020015/ DO - 10.1051/m2an/2020015 LA - en ID - M2AN_2020__54_6_2229_0 ER -
%0 Journal Article %A Gong, Wei %A Hu, Weiwei %A Mateos, Mariano %A Singler, John R. %A Zhang, Yangwen %T Analysis of a hybridizable discontinuous Galerkin scheme for the tangential control of the Stokes system %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2020 %P 2229-2264 %V 54 %N 6 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2020015/ %R 10.1051/m2an/2020015 %G en %F M2AN_2020__54_6_2229_0
Gong, Wei; Hu, Weiwei; Mateos, Mariano; Singler, John R.; Zhang, Yangwen. Analysis of a hybridizable discontinuous Galerkin scheme for the tangential control of the Stokes system. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 54 (2020) no. 6, pp. 2229-2264. doi : 10.1051/m2an/2020015. http://www.numdam.org/articles/10.1051/m2an/2020015/
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