Title

A Class of Embedded DG Methods for Dirichlet Boundary Control of Convection Diffusion PDEs

Abstract

We investigated a hybridizable discontinuous Galerkin (HDG) method for a convection diffusion Dirichlet boundary control problem in our earlier work (Gong et al. SIAM J Numer Anal 56(4):2262—2287, 2018) and obtained an optimal convergence rate for the control under some assumptions on the desired state and the domain. In this work, we obtain the same convergence rate for the control using a class of embedded DG methods proposed by Nguyen et al. (J Comput Phys 302:674—692, 2015) for simulating fluid flows. Since the global system for embedded DG methods uses continuous elements, the number of degrees of freedom for the embedded DG methods are smaller than the HDG method, which uses discontinuous elements for the global system. Moreover, we introduce a new simpler numerical analysis technique to handle low regularity solutions of the boundary control problem. We present some numerical experiments to confirm our theoretical results.

Department(s)

Mathematics and Statistics

Keywords and Phrases

Dirichlet Boundary Control; Elliptic Convection Diffusion Equations; Embedded Discontinuous Galerkin (EDG) Method; Error Analysis; Interior Embedded Discontinuous Galerkin (IEDG) Method

International Standard Serial Number (ISSN)

0885-7474; 1573-7691

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Springer New York LLC, All rights reserved.

Publication Date

01 Nov 2019

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