(340f) Investigations on Dynamics of Agglomerates in a 2D Vibrated Fluidized Bed Using Pressure Signal and High-Speed Image Analysis

The transition of particle systems between solid-like and fluid-like regimes is driven by changes in density and in applied states. In this respect, mechanical vibrations in drive the unjamming transition have been proved to reduce the unconfined yield stress and cohesion, thus achieving effective particle fluidization. In the present work, the physical and flow properties of Micro-nano alumina powders were first characterized. A predictive model of inter-particle forces has been developed upon the Mohr's Circle and the Rumpf equation to analyze the complex particle interactions between different particle systems. We investigated the dynamic characteristics of agglomerates in a 2D vibrated bed and the mechanism under which the vibration energy excites the agglomerates motion and deformation in the vibration fluidization state using digital image processing and signal analysis. The effect of powder physical properties and vibration parameters (frequency, amplitude, etc.) on particle fluidization was analyzed.