The Definition and Measurement of Some Characteristics of Mixtures

The systematic study of mixing processes requires a quantitative method of expressing “goodness of mixing”, based on conveniently-made measurements. In this paper, mixtures of mutually soluble liquids, fine powders, or gases are considered. It is shown that the important features of such mixtures can be expressed by two statistically-defined quantities, the scale and the intensity of segregation, and methods of measuring these are suggested. The discussion also throws light on some of the factors which affect the efficiency of mixing processes.