Optimization Strategies for Fluid-Structure Interaction in Maritime Applications

Project members:

Christian Kühne, Lars Radtke, Prof. Alexander Düster


Project outline:

The aim of this project is to develop different strategies for optimization of the fluid-structure
interaction (FSI) in terms of different cost functions under consideration of constraints. This leads to
problems such as shape optimization of the structure to gain efficiency. In order to manage the
computational effort another goal is to advance the method in terms of computational time and also
robustness, for different problems in maritime applications.
The FSI plays an important role in the simulation of maritime applications. As in the example of
simulating propeller motion in a fluid, the hydrodynamic forces acting on the propeller blades lead to
their deformation, which in turn affects the surrounding fluid. This interaction between the structural
and the fluid field must be taken into account. Due to the complexity of this coupled problem, high
computational efforts are required.
In this project we use a partitioned solution approach, where the hydrodynamic and structural problems
are simulated separately. This approach allows the use of existing simulation software specialized for
the different domains. To solve the coupled problem, the coupling quantities have to be exchanged at
the interface to update the boundary conditions of the subproblems. For this purpose we use the in-
house developed coupling manager COMANA.