Gravity-driven thin-film flow with negatively buoyant particles
  This arXiv article describes the fluid dynamics video on `Gravity-driven thin-film flow with negatively buoyant particles', presented at the 64th Annual Meeting of the APS Division of Fluid Dynamics in Baltimore, MD in November 2011. The video shows three different experiments where a thin film of silicone oil laden with particles, is allowed to flow down an incline under the action of gravity. The videos were recorded at the UCLA Applied Math Laboratory. 
A. Mavromoustaki, P. David, S. Hill, P. Latterman, W. Rosenthal, M.   Mata, A. L. Bertozzi
physics.flu-dyn