Reversal of gulf stream circulation in a vertically vibrated triangular fluidized bed
In this collaborative work with Prof. Acosta-Iborra (Carlos III University, Madrid) we probed experimentally the effect of vibration on the dynamics of particles in a fluidized bed of triangular shape.
We observed different circulation patterns as a function of vibration amplitude and frequency when the fluidization velocity is just below and above the minimum fluidization velocity. Noticeably, for zero gas velocity, particles ascend close to the side walls and descend in the center of the bed. By injecting a fluidizing gas, the circulation pattern of the bed can be reversed (i.e. particles descend near the inclined walls and ascend in the center of the bed).
Authors: E. Cano-Pleite, F. Hernandez-Jimenez, A. Acosta-Iborra and C.R. Müller