1. ABB Switzerland Ltd., 5400 Baden, Switzerland
2. Multiphase Reactors Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, The Netherlands
3. Laboratory for Thermal-Hydraulics, Nuclear Energy and Safety Department, Paul Scherrer Institute, Switzerland
4. Institute of Chemical Technology, Matunga, Mumbai 400 019, India
5. Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400 094, India