Acknowledgements

This work was mainly sponsored by the German Ministry of Education and Research (BMBF) under the umbrella of the MEGAFLOW project and the European Commission in the $5^{th}$ Framework Programme TAURUS. The three-dimensional FLOWer computations presented here were calculated on the CRAY T3E of ZIB Berlin, the TAU results were obtained on the SGI Origin 3800 at Poznan Supercomputing Center. Their respective support is gratefully acknowledged. Finally, the author would like to thank DLR and Airbus Germany for continued cooperation and support.