Dispersion in fluidised beds

The material presented earlier on dispersion in packed beds (Section 5.6.5) is also relevant to fluidised beds. However, in the only experimental study reported [Wen and Fan, 1973], longitudinal dispersion coefficient Dl was measured by introducing a fluorescein dye into beds of glass and of aluminium spheres fluidised by mildly shear-thinning carboxymethyl cellulose solutions n = 0.86 and n = 0.89). The limited results are well correlated by the following modified form of equation (5.61)  

6 Liquid-solid mass transfer in fluidised beds 

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