In the process of pneumatic segregation aerodynamic properties
of particles are used as a segregation feature, while the characteristic
measure is their critical velocity (lift velocity). From
practice it is known that its value even for the same species of
seeds fluctuates in a very vast range. The greater the difference
between values of critical velocities of individual components in
mixture, the better and more efficient is the pneumatic separation
(Emami et al., 2007; Huang et al., 1984).