Second-order elliptic PDE with discontinuous boundary data
Houston, Paul and Wihler, Thomas P. (2009) Second-order elliptic PDE with discontinuous boundary data. IMA Journal of Numerical Analysis . ISSN 0272-4979 (Submitted)
Official URL: http://imajna.oxfordjournals.org/
We shall consider the weak formulation of a linear elliptic model problem with discontinuous Dirichlet boundary conditions. Since such problems are typically not well-defined in the standard H^1-H^1 setting, we will introduce a suitable saddle point formulation in terms of weighted Sobolev spaces. Furthermore, we will discuss the numerical solution of such problems. Specifically, we employ an hp-discontinuous Galerkin method and derive an L^2-norm a posteriori error estimate. Numerical experiments demonstrate the effectiveness of the proposed error indicator in both the h- and hp-version setting. Indeed, in the latter case exponential convergence of the error is attained as the mesh is adaptively refined.
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