1. IFP Energies Nouvelles, Fluid Mechanics Department, Rond-point de l’Echangeur de Solaize, BP 3, 69360 Solaize, France
2. Laboratoire de Mécanique des Fluides et d’Acoustique (LMFA), Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Ecully, France
3. Department of Mathematics, University of British Columbia, 1984 Mathematics Road, Vancouver, British Columbia V6T 1Z4, Canada
4. Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada