Bernhard Gatzhammer
Master's Thesis:
A Partitioned Approach for Fluid-Structure Interaction on Cartesian Grids
Partitioned FSI With FSI*ce.
The thesis is about the computer-based simulation of problems from fluid-structure
interaction (FSI). Fluid-structure interactions are a multiphysics problem and combine
fluids, structures, and their bi-directional interactions.
CFD Benchmark Velocity Profile.
Instead of solving one specific
problem or applying one specialized approach to the field of FSI, the thesis rather strives
to provide a software environment supporting arbitrary kinds of investigations into and
solutions of partitioned FSI problems.
It does so by providing a coupling environment for
two independent simulation programs, one specialized on the simulation of fluids and the
other one on structures.
The special idea behind this tool is to encapsulate all coupling
functionality into a unit called coupling supervisor, which minimizes the amount of work
necessary to prepare a simulation program for coupled simulations. This is achieved with
a client-server based software architecture, hiding the coupled simulation programs from
each other by a redirection of all communication to the coupling supervisor and the
use of a dedicated coupling mesh for the communication of coupling data.
CFD Benchmark Forces.
In order to approve the maturity of the coupling tool, it must be validated by the simulation of a well
defined test scenario providing quantities for comparison with approved results.
This leads to the second part of this work, the preparation of a fluid simulation program for
the simulation of an FSI benchmarking scenario. To qualify a fluid solver for partitioned
FSI simulations, it must be able to handle dynamic geometries and to transfer data from
its discretization mesh to that of the coupling supervisor. Finally, numerical results are
presented, showing the influence of implemented features and giving some first ideas
about the expected results of the FSI benchmark scenarios.
Material
