Multiscale Finite Element approach for "weakly" random problems and related issues

Details Multiscale Finite Element approach for "weakly" random problems and related issues Multiscale Finite Element approach for "weakly" random problems and related issues

2011-11-07

arxiv.org/abs/1111.1524v1

Mathematics

Numerical Analysis

Scientific paper

We address multiscale elliptic problems with random coefficients that are a perturbation of multiscale deterministic problems. Our approach consists in taking benefit of the perturbative context to suitably modify the classical Finite Element basis into a deterministic multiscale Finite Element basis. The latter essentially shares the same approximation properties as a multiscale Finite Element basis directly generated on the random problem. The specific reference method that we use is the Multiscale Finite Element Method. Using numerical experiments, we demonstrate the efficiency of our approach and the computational speed-up with respect to a more standard approach. We provide a complete analysis of the approach, extending that available for the deterministic setting.

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