1. University of Bremen; Department of Production Engineering; Institute of Environmental Process Engineering (IUV); Leobener Strasse 28359 Bremen Germany
2. Universität der Bundeswehr München; Institute of Fluid Mechanics and Aerodynamics; Werner-Heisenberg-Weg 39 85577 Neubiberg Germany
3. University of Bremen; Department of Production Engineering; Foundation Institute of Materials Science (IWT); Badgasteiner Strasse 3 28359 Bremen Germany