1. Multiphase Reactors, Chemical Engineering and Chemistry; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
2. Dept. of Ironmaking R&D; Tata Steel; 1970 CA IJmuiden The Netherlands
3. Dept. of Physics and J.M. Burgers Center for Fluid Dynamics; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
4. Dept. of Applied Mathematics; University of Twente; 7500 AE Enschede The Netherlands