Analysis of the Adhered Particle Secondary Migration on the Slider Air Bearing Surface

An entrapped particle on the slider air bearings damages the surface of the slider or the disk. The study of particle movement on and the particle adhesion mechanism onto the slider surface is critical to reduce entrapped particle-induced damage. In this paper, we extend the previous work proposing a dynamical model of the adhesive particle redistribution and migration on the slider surface. The model predicts whether the adhered particle will remain stationary action of the aerodynamic forces. Further, particle behaviors after detachment are analyzed considering the effects of flow shear rate, particle diameter and properties. There are four particle movement styles on the slider surface. Finally, the particle migration trajectory and velocity with time on the slider surface are presented.