An investigation on the collisional behaviour of granular flows

PicGeoPRofSpecial interests in the dynamic of granular flows have broadly grown in the last decades. Not only have these flows encompassed applications in chemistry and industrial technology but have been also applied to the fields of natural sciences and civil engineering. Although variety of new methods and theories are currently in use, new conceptual and physical tools to exhaustively approach this type of flows are required. This project aims to provide understanding on the internal behaviour of simple dry granular flows and geophysical-like flows in a later stage. Particular emphasis is given to the mechanics and mobility of debris flows from a collisional point of view. The final goal is to provide insights useful to predict their hazard and to optimize the strategy of defence.

Free surface flows of particles and fluid will be investigated through small-scaled laboratory flumes. DEM simulations will be also performed for dry granular flows. In addition, planar laser induced fluorescence (PLIF), which relies on the matching of refractive index of a glass-oil mixture, will provide internal flow profiles. Within a set of digital images collected via a high-speed camera, particle tracking velocimetry (PTV) will lead to understand small-scale effects upon the average bulk flow.