TABLE OF CONTENTS As indicated by the previous considerations, the two-phase flow is an extremely complicated physical phenomenon. Evidently, the approach used for the construction of the theory of such flows is insufficient. As soon as it is necessary to examine the problems of mass transfer in the flows of this type, the inefficiency of the existing theories becomes evident, regardless of the extensive application, especially in recent years, of various methods of mathematical modelling.
The problem of the separation of the solid phase in the two-phase flows organised in the separation conditions, has not been sufficiently studied yet.
This is undoubtedly one of the most complicated and confusing problems of the theory and, in most cases, it is attempted either to bypass this problem or restrict its examination to empirical relationships.
The explanation of several aspects of the process and the definition of the most general relationships governing the process, are possible only with the application of statistical approaches.
The principal distinctive feature of the statistical approach is that this approach is based on the definition of the state of the entire system and not individual objects, as at the application of analytical methods. Although in this approach it is necessary to avoid using a large number of partial factors, the approach is nevertheless quite fruitful because it makes it possible to explain the general pattern of the process.
It is well-known that the behaviour of a population of solid particles forming a two-phase flow together...
