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arXiv 1811.09686math.NAcs.NA
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一种用于对流扩散PDE Dirichlet边界控制的嵌入型DG方法类

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

University of Electronic Science and Technology of China(电子科技大学);Brown University(布朗大学);Missouri University of Science and Technology(密苏里科技大学);University of Delaware(特拉华大学)

Gang Chen, Guosheng Fu, John Richard Singler, Yangwen Zhang

AI总结:

本文研究了一种嵌入型DG方法,用于对流扩散PDE的Dirichlet边界控制问题,通过新的数值分析技术实现了与HDG方法相同的一致收敛率,且具有更少的自由度。

摘要:

我们在先前的工作[SIAM J. Numer. Anal. 56 (2018) 2262-2287]中研究了一种混合型不连续Galerkin (HDG)方法用于对流扩散Dirichlet边界控制问题,并在某些假设条件下获得了控制量的最佳收敛率。在本文中,我们使用Nguyen, Peraire和Cockburn [J. Comput. Phys. vol. 302 (2015), pp. 674-692] 提出的一类嵌入型DG方法,实现了相同收敛率。由于嵌入型DG方法的全局系统使用连续元素,因此其自由度数量比使用不连续元素的HDG方法更少。此外,我们引入了一种新的更简单的数值分析技术来处理边界控制问题中的低正则性解。我们还通过一些数值实验来验证我们的理论结果。

英文摘要:

We investigated an hybridizable discontinuous Galerkin (HDG) method for a convection diffusion Dirichlet boundary control problem in our earlier work [SIAM J. Numer. Anal. 56 (2018) 2262-2287] 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, Peraire and Cockburn [J. Comput. Phys. vol. 302 (2015), pp. 674-692] 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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