Abstract
This study proposes a model to predict the temperature effect on the onset velocity of turbulent fluidization (u c ) of Geldart type A particles. It was found that void splitting could occur in the whole bed when the initial bubble size at the distributor (d bo ) was greater than the maximum stable bubble size (d bmax ) or the equilibrium bubble size (d beq ). The proposed model was successful to fit the trend of temperature effect on the uc. When the bubble growth was limited by the d bmax , the uc increased with an increase of temperature. However, when the d beq was smaller than d bmax , the uc decreased with an increase of temperature because the minimum fluidizing velocity and thus the d beq decreased. The u c increased initially and decreased later when the d beq /d bmax starting with the ratio >1 decreased to the ratio <1 as temperature increased. The present model predicted the trend properly that any other existing correlations could not be able to reflect.
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Choi, JH., Ryu, HJ. & Yi, CK. A model for the temperature effect on onset velocity of turbulent fluidization of Geldart type A particles. Korean J. Chem. Eng. 28, 304–307 (2011). https://doi.org/10.1007/s11814-010-0337-x
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DOI: https://doi.org/10.1007/s11814-010-0337-x