Classification mechanism and airflow simulation of active pulsing air separation

Considering the difference of drag coefficients of particles moving through areas of varying Reynolds numbers, an extra-mass force acting on particles in the active pulsing air field was introduced. Models of the dynamic motion in which the particles both in Stokes and Newtonian fluids, follow as they move in the pulsing air flow were developed. And a computer numerical simulation was carried out that showed the traces of particles with different densities and diameters, but similar aerodynamic characteristics, as they moved through the turbulent flow, to modify and define the parameters of the models. The motion law of tracing spheres was studied in a laboratory active pulsing air classifier with a high-speed video camera and motion particle analyzer. The mechanism of active pulsing air classification was studied. The results show that simulation can predict the observed results with artificial tracing spheres separated by the laboratory equipment. The comparison of the simulation and laboratory experiment results show that the relative errors of velocities are less than 8% for lighter particles and less than 5% for heavier particles