” The increasing accuracy requirements in many of today’s simulation tasks in science and engineering more and more often entail the need to take into account more than one physical effort. Among the most important and, with respect to both modelling and computational issues, most challenging of such ’multiphysics’ problems are FluidStructure Interactions (FSI), i.e. interactions of some movable or deformable elastic structure with an internal or surrounding fluid flow” ([3], p. V). In order to be able to tackle such problems, effective and efficient simulation programs are needed. Here we present the Peano Geometry Sophisticated Interface (PeGSI), which acts as a geometry interface and a decoupling layer between a fluid and a structure solver. The final objective is to be able to simulate the drift ratchet phenomenon described in [4]. PeGSI is a BGCE honours project: The Bavarian Graduate School of Computational Engineering offers an honours program funded by the Elite Network of Bavaria to promote highly qualified students. Part of the program’s curriculum is extensive project work. These honours projects are usually run by small groups of students and last six up to eight months (http://www.bgce.de).