Convection and motion characteristics of granular media in horizontal vibratory finishing

To explore the characteristics of the flow field and the movement of granular media in horizontal vibration, the motion behavior of granular media was studied based on the horizontal vibratory finishing blade process. The evolution of the fluidization process of granular media under different frequencies and amplitudes was analyzed. The relationship between granular media's long-term and short-term movements and their effects was clarified. And the results were verified by PIV technology. The results show that increasing the frequency and amplitude can improve the fluidization degree of the particle system. Moreover, increasing the amplitude is more effective than frequency. Due to the blade's obstruction, the flow field's characteristic is an asymmetric double rolls. Granular media's macro-movement is divided into long-term and short-term motion based on particles' movement characteristics. The short-term motion of granular media mainly realizes the polishing and finishing of the blade, while the long-term motion realizes the renewal and replacement of granular media. The long-term and short-term movements are positively correlated. This study provides a reference for selecting process parameters and regulating particle flow fields in horizontal vibration. Graphical abstract