1. Department of Chemical and Materials Engineering, University of Alberta, Alberta T6G 1H9, Canada
2. Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, U.K.
3. Physics of Fluids Group, Max Planck Center Twente for Complex Fluid Dynamics, JM Burgers Center for Fluid Dynamics, Mesa+, Department of Science and Technology, University of Twente, Enschede 7522 NB, The Netherlands