(477c) Classifying the Fluidization and Segregation Behavior of Binary Mixtures Using Particle Size and Density Ratios

Rao, A. A. - Presenter, University of Florida
Curtis, J. S. - Presenter, University of Florida
Wassgren, C. R. - Presenter, Purdue University
Hancock, B. C. - Presenter, Pfizer Worldwide Research and Development

Experimental investigations show that fluidized binary mixtures exhibit varied pressure drop profiles and segregation patterns, depending on the level of disparity due to size and/or density differences. In this study, different mixture types are mapped on a graph of density ratio versus size ratio. It is found that the ratio of the minimum fluidization velocities of individual components can be used to categorize these mixtures. A simple correlation is developed to compute the ratio of the minimum fluidization velocities based on the density and size ratios. Categorizing the binary mixtures in this manner gives a qualitative understanding of how the different mixtures behave upon fluidization.