1. Chair of Numerical Thermo-Fluid Dynamics; TU Bergakademie Freiberg; Fuchmühlenweg 9 09599 Freiberg Germany
2. Institute of Numerical Analysis and Optimization; TU Bergakademie Freiberg; Akademiestraße 6 09599 Freiberg Germany
3. Chair of Numerical Mathematics; TU Chemnitz; Raichenhainer Straße 41 09126 Chemnitz Germany