A priori error indicator in the transformation method for problems with geometric uncertainties

Duc Hung Mac (1) , Stéphane Clenet (1) , Jean-Claude Mipo (2) , Igor Tsukerman (3)

1 L2EP - Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697
2 Valeo Electrical Systems
3 Department of Electrical and Computer Engineering [Akron]

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

Mots clés: Stochastic problem; random domain; random mapping; a priori error indicator; static fields

Domaines: Analyse numérique [math.NA]; Electromagnétisme; Energie électrique

Duc Hung Mac, Stéphane Clenet, Jean-Claude Mipo, Igor Tsukerman. A priori error indicator in the transformation method for problems with geometric uncertainties. IEEE Transactions on Magnetics, 2013, 49 (5), pp.1597 - 1600. ⟨10.1109/TMAG.2013.2243706⟩. ⟨hal-00830870⟩