The problem is that Segregation is a generic term for a wide range of different separating mechanisms of which each depend on many factors of the bulk material so there is no embracing quantitative relationship that allows a general approach. An analysis has to follow the route of particle properties, forces, mechanisms, processes to applications. The BMHB book - 'Users Guide to segregation' sets out the structure and includes examples and some rectifying techniques that may be useful. ■