Sedimentation and fluidization of solid particles in liquids

The sedimentation and fluidization of particles of mixed sizes and different densities were studied. A new concept—the apparent porosity of suspensions—was introduced, on the basis of which equations have been developed that are capable of predicting the settling velocities of individual types of particles in a suspension containing mixtures of particles. The validity of these equations was tested against experimental data in both sedimentation and fluidization.