Analysis of a Hybridizable Discontinuous Galerkin Scheme for the Tangential Control of the Stokes System
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.
W. Gong et al., "Analysis of a Hybridizable Discontinuous Galerkin Scheme for the Tangential Control of the Stokes System," ESAIM: Mathematical Modelling and Numerical Analysis, vol. 54, no. 6, pp. 2229-2264, EDP Sciences, Nov 2020.
The definitive version is available at https://doi.org/10.1051/m2an/2020015
Mathematics and Statistics
Center for High Performance Computing Research
Keywords and Phrases
Hybridizable discontinuous Galerkin method; Stokes equations; Tangential Dirichlet boundary control
International Standard Serial Number (ISSN)
Article - Journal
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01 Nov 2020