Collaborative research funded by the Institute of Mechanics Processes and Control -Twente (IMPACT), and Woods Hole Oceanographic Inst.
Overview presentation: Lorentz Center October 2009.

Granular flow phenomena in movies:

• a) Reservoir formation: dam break of glass beads on an inclined chute with contraction. mpg.
  
  An idealized experimental version of the Mount St. Helens volcanic lahar?
  

  b) Multiple flow states: glass beads on an inclined chute with contraction. mpg.
  

  c) Granular bore: nonspherical poppy seeds on an inclined chute with contraction. mpg.
  

  Towards controling flows in particulate handling? (Poppy seeds from Dipasa Europe.)
  

  d) Simulations by Bert Vreman from Vreman Research, Hengelo; now at Akzo Nobel.
  

  e) Experiments at Chemical Reaction Engineering:
  chute flow with inclination such that there is uniform flow in the absence of a contraction or obstacle:
  

• A.W. Vreman, M. Al-Tarazi, J.A.M. Kuipers, M. van Sint Annaland, and O. Bokhove 2007:
  Supercritical shallow granular flow through a contraction: experiment, theory and simulation. Journal of Fluid Mech. 578, 233-269
• B. Akers and O. Bokhove 2008: Hydraulic flow through a channel contraction: multiple steady states. Physics of Fluids 20, 056601.
  Movie (Akers & B. '05): multiple steady states in horizontal channel; pink water; bird's eye view.
  Movie (Akers & B. '07): reservoir state.

  Sander Rhebergen, Onno Bokhove, and Jaap van der Vegt, 2009:
  Discontinuous Galerkin finite element methods for shallow two-phase flows. CMAME 198, 819-830.

  Slurry flows: Simulation by Sander Rhebergen of an

  experiment by Akers and Bokhove: transition of steady state due to sudden release of floating particles with density of 900 kg/m^3.

  Slurry flows: Discrete element study of liquid-solid flows. Micheline Abbas et al., 2009. (Journal paper in progress.)
  Conf. Proceedings. International Symposium of Multiphase Flows, July 11-15, 2009, Xi'an, China.