The objective of inertial classification facilities is to classify the particles which follow the flow well and particles which do not. The flow in which the vertical flowing direction is slightly bent to the right side, and thereafter, largely bent to the left side is taken up. Moreover, the flow which utilizes von Karman's vortex street and that which changes the extent of meandering slightly in the course of time is also taken up.
At the first change in the flowing direction, the particle trajectories which follow the flow well and those which do not can be identified. However, when the effect of the next change in the flowing direction is exerted on them, the tracks of both particles may not be able to be identified clearly.
