Oscillating Fluidized Bed Combustion

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Motivation: particles in fluidized beds can agglomerate for a number of reasons (electrical, chemical, mechanical interactions) and decrease the effectiveness of heat and mass transfer throughout the bed. External oscillations can help these up, but effects on other aspects of fluidization are unknown

Approach: a fluidized bed system has been developed with external oscillation for small particle fluidized beds. Oscillating the bed externally reduces bed height. Work continues to understand why this bed height reduction occurs including the addition of fines and comparing round particles with ground particles.

Fundamental Issues: models of oscillating fluidized beds with round monodisperse particles do not show the bed collapse seen in the lab.



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