Abstract
The effects of different kind of particles, different particle sizes, conical angles, and static bed heights on the pressure fluctuations and pressure drop in spouted beds were studied. The results showed that the standard deviation of the pressure fluctuations not only described the transition of the regime but also determined the minimum spouting velocity. After transformation with spectral analysis, the major frequency of the pressure fluctuation data was changed with the variation of the hydrodynamics. In addition, the changes of the special frequency scales corresponded to the hydrodynamic changes.
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