A priori error indicator in the transformation method for problems with geometric uncertainties | Mac, Duc Hung
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A priori error indicator in the transformation method for problems with geometric uncertainties

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Mac, Duc Hung | Clenet, Stéphane | Mipo, Jean-Claude | Tsukerman, Igor

Edité par HAL CCSD ; Institute of Electrical and Electronics Engineers

Version éditeur de cette publication à l'adresse suivante : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6514655. To solve stochastic problems with geometric uncertainties, one can transform the original problem in a domain with stochastic boundaries and interfaces to a problem defined in a deterministic domain with uncertainties in the material behavior. The latter problem is then discretized. There exist infinitely many random mappings that lead to identical results in the continuous domain but not in the discretized domain. In this paper, an a priori error indicator is proposed for electromagnetic problems with scalar and vector potential formulations. This leads to criteria for selecting random mappings that reduce the numerical error. In an illustrative numerical example, the proposed a priori error indicator is compared with an a posteriori estimator for both potential formulations

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