(72a) Characterizing and Modeling Structured Bubbling in Gas-Solid Fluidized Beds

Bubble dynamics have a strong effect on particle conveyance and mixing as well as gas-solid contact in fluidized beds. Bubbles typically rise and coalesce in a chaotic manner in fluidized beds, making industrial systems different to scale up and operate in an optimal manner. Prior studies have shown that novel device designs, such as oscillating gas flow rate, can induce structure in fluidized beds. Here, we discuss our ongoing research of structured bubble dynamics in fluidized beds. This includes (i) physical mechanisms which create structure, (ii) quantification of structuring, (iii) analytical modeling and design rules for resonance in fluidized beds, (iv) effect of scale-up on structure and (v) development of continuum computational modeling which can capture structured bubbling dynamics.