A computational approach for free surface flows with structural interactions

Fluid-structure interaction (FSI) problems are of great relevance to many fields in engineering and applied sciences. One wide spread and complex FSI-subclass is the category thatstudies the instationary behaviour of incompressible viscous flows and thin-walled structures exhibiting large deformations. Free surfaces often present an essential additional challenge for this class of problems. Prominent application areas are fluid sloshing in tanks and numerable problems in offshore engineering and naval architecture. Especially when partitioned strong coupling schemes are used in order to solve the coupled FSI problem the design of an appropriate overall including free surface effects is not trivial. In this paper a so-called partitioned implicit free surface approach is introduced and embedded into a strong coupling FSI solver. The presented approach shows the same stability properties as a full implicit approach but is by far more efficient - especially in the partitioned coupled case.