J. Degroote1, R. Rossi2, R. Wüchner3
1Ghent University/BE, 2Universitat Politècnica de Catalunya/ES, 3Technische Universität München/DE
Coupled problems and multi-physics problems can be simulated in a partitioned way by coupling existing programmes which solve the sub-problems. However, partitioned simulations require some coupling technique to enforce the equilibrium between the solvers. If the interaction between the solvers is weak, both sub-problems usually have to be solved only once per time step. By contrast, strong interaction often requires coupling iterations between the solvers in each time step.
If the sub-problem solvers are treated as black-boxes, this yields software modularity and easier maintenance. Conversely, access to the solvers can allow for faster solution of the coupled problem. Several staggered solution techniques have been constructed and analysed. Also several coupling techniques for the stabilisation of coupling iterations have been developed, including (Aitken) relaxation, Interface GMRES, quasi-Newton techniques, Robin boundary conditions, etc.
This mini-symposium focuses on recent advances in partitioned simulation, both with black-box solvers and with accessible solvers. Contributions on coupling algorithms, software development and applications are welcome. The goal is to demonstrate the state-of-the-art of partitioned simulations by gathering scientists who perform partitioned simulations of different coupled problems such as fluid-structure interaction, conjugate heat transfer, soil-structure interaction, etc. Also partitioned adjoint solvers of these coupled problems for applications in optimization and parameter identification can be submitted.