A first illustration of a multimodel strategy for coupled multiphysics problems

This contribution proposes a suitable framework for the multimodel simulation of strongly coupled multiphysics problems based on the non-incremental LATIN-PGD method. This strategy relies on introducing an interface between physics, which can be seen as a generalization of the geometrical interfaces between substructures found in domain decomposition. Therefore, the different physics only communicate through this interface (where the coupled equations are satisfied), whereas the monophysical equations are solved separately for each physics. This separate treatment allows using different kinds of models for both physics. A first implementation in the case of strongly coupled 3D thermo-mechanics is presented herein and deals with coupling a full order model (FOM) with a simplified one (reduced order (ROM) or even analytical). The choice of the accommodation space in which these different models communicate is specifically discussed.