Development of finite element formulation for fluid-structure interaction modelling

The maturing of a scientific calculation method, from its mathematical formalization to its practical application, via its numerical implementation, is an innovation challenge for industrial players in numerical simulation (numerical modeling researchers, calculation code publishers, simulation tool users).

Research into numerical modeling, whether undertaken in academic laboratories or centers of expertise, or by industrial teams (publishers or users of calculation codes), responds to various industrial needs, such as the need for finer physical models (to improve calculation accuracy), or more efficient methods (to reduce modeling costs and computational resources).

Feedback is provided on an R&D project aimed at developing a modeling and simulation methodology for calculating the dynamic response of nuclear capacities to seismic stresses. The project is based on expertise and research undertaken in a CEA laboratory, on the consideration of fluid-structure interaction in reactor cores, tube bundles, etc.. It supports the development of – skills in terms of mathematical modeling and numerical calculation – of a naval defense manufacturer for submarine propulsion applications.

Conducted over a long period, the project, funded by a government department, has enabled the development of an original calculation method, integrated as a feature within an academic calculation code and an industrial calculation code, enabling expert analysis of the behavior of assemblies within reactor cores or heat exchanger tubes.