FEM-BEM coupling in Fractional Diffusion

02/22/2023

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by   Markus Faustmann, et al.

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We derive and analyze a fully computable discrete scheme for fractional partial differential equations posed on the full space ℝ^d . Based on a reformulation using the well-known Caffarelli-Silvestre extension, we study a modified variational formulation to obtain well-posedness of the discrete problem. Our scheme is obtained by combining a diagonalization procedure with a reformulation using boundary integral equations and a coupling of finite elements and boundary elements. For our discrete method we present a-priori estimates as well as numerical examples.