Non-Invasive Probes of Granular Materials: Magnetic Resonance Imaging, Capacitance and High-Speed Video

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The flow microstructure of non-cohesive granular materials will be measured by using Magnetic Resonance Imaging (MRI) with improved spatial and temporal resolution. The main objective is better understanding of motion of particulate systems when the particulates are shaken, mixed and shared. Non-intrusive capacitive probes will be used for density (solids concentration) measurements, and a high speed camera will provide information on inter-particle collisions in the proximity of transparent walls. Quasi-two- and three-dimensional flow domains will be considered. The connection between particle-particle and particle-wall interactions on the overall flow pattern will be probed, and experimental data for model verification will be obtained. The experiments have direct relevance to convection-driven particle separation and particle compaction. The interpretation of the results has relevance to a broader category of phenomena in particle handling and processing.