Studies in Mathematics and Computer Science, University of Bonn, GermanyDissertation, Institute for Numerical Simulation, University of Bonn, Germany, Supervisor: Prof. Dr. Martin RumpfResearch Assistant, German Aerospace Center (DLR), Institute of Propulsion Technology, Numerical Methods departmentPostdoctoral Researcher, Numerical Simulation group Prof. Dr. Gregor Gassner, Division of Mathematics, University of Cologne