CHARACTERIZING THE DYNAMIC SHAPE AND TRANSPORT BEHAVIOR OF COARSE PARTICLES

The dynamic shape of coarse particles was determined by catastrophic t umbling studies performed in a rotating cylinder. Here, the dynamic sh ape was defined as the deviation from ideally regular and predictable tumbling behaviour. The data suggested that even with a comprehensive description of a static particle its transport properties cannot be ac curately predicted. The fractal dimension in data space of the time se ries of events presents a method that can identify limits of predictab ility, and thus show regions that should be avoided to minimise the em ergence of chaotic behaviour.