8. Conclusion

Strongly coupled fluid structure coupling techniques are applied to some realistic test cases. Energy consideration of the mechanical system gives insight into the accuracy of these methods for predicting instabilities. The importance of consistent boundary conditions, in space, on the interface boundary, within the spatial discretisation, and in time for the coupling method, have direct consequences on the energy prediction.

Only fully implicit strongly coupled algorithms where the coupling is performed at the same time level preserve the conservation of energy in the system.