Abstract
We investigate the stochastic collocation method for parametric, elliptic partial differential equations (PDEs) with lognormally distributed random parameters in mixed formulation. Such problems arise, e.g., in uncertainty quantification studies for flow in porous media with random conductivity. We show the analytic dependence of the solution of the PDE w.r.t. the parameters and use this to show convergence of the sparse grid stochastic collocation method. This work fills some remaining theoretical gaps for the application of stochastic collocation in case of elliptic PDEs where the diffusion coefficient is not strictly bounded away from zero w.r.t. the parameters. We illustrate our results for a simple groundwater flow problem.
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Acknowledgements
The authors gratefully acknowledge financial support from the DFG Priority Programme 1324 as well as helpful discussions with Lorenzo Tamellini, Fabio Nobile and Alexei Bespalov.
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Ernst, O.G., Sprungk, B. (2014). Stochastic Collocation for Elliptic PDEs with Random Data: The Lognormal Case. In: Garcke, J., Pflüger, D. (eds) Sparse Grids and Applications - Munich 2012. Lecture Notes in Computational Science and Engineering, vol 97. Springer, Cham. https://doi.org/10.1007/978-3-319-04537-5_2
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DOI: https://doi.org/10.1007/978-3-319-04537-5_2
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