A New Expression for Dispersedness of Multi-Phase Taking Account of Consideration of Local Size Distribution

Abstract

The establishment of the way of expression for degree of dispersion of multi-phase in a vessel taking account of local size distribution is indispensable in the study of the control of the operational conditions of chemical equipment in which mulit-phase operation is done. By expanding the definition of multi-component mixedness based on the information entropy concept, a new expression for dispersedness is defined which expresses the degree of dispersion of multi-phase in a vessel taking account of local size distribution. The newly defined dispersedness has unity value when every size particle disperses homogeneously in the vessel and zero value when each region in the vessel is occupied by one size group or continuous phase only. The validity of the new way of expressing dispersedness is confirmed experimentally by applying it to the operations of a flow crystallizer.