Title :
An investigation of a slider air bearing with a asperity contact by a three-dimensional direct simulation Monte Carlo method
Author :
Huang, Weidong ; Bogy, David B.
Author_Institution :
Dept. of Mech. Eng., California Univ., Berkeley, CA, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
A direct simulation Monte Carlo (DSMC) method is used to solve a slider air bearing problem when isolated contacts occur. A flat slider with a spherical asperity underneath is simulated when the tip of the asperity contacts a plate moving at constant speed. Two-dimensional pressure profiles are obtained by using the ideal gas law. The air bearing force on the slider is obtained by calculating the time-averaged change in the vertical momentum of the simulated particles striking the slider. The results show that the pressure is bounded at the contact point. There exists a vacuum region around the contact point where no molecule is small enough to enter. The results also show that the peak pressure and the resultant force converges as the calculation grid gets denser
Keywords :
Monte Carlo methods; hard discs; magnetic heads; mechanical contact; tribology; air bearing force; asperity contact; calculation grid; hard disk; ideal gas law; isolated contacts; magnetic head sliders; slider air bearing; spherical asperity; three-dimensional direct simulation Monte Carlo method; time-averaged change; two-dimensional pressure profiles; vacuum region; vertical momentum; Boltzmann equation; Computational modeling; Computer simulation; Drives; Laboratories; Magnetic heads; Mechanical engineering; Monte Carlo methods; Predictive models; Solids;
Journal_Title :
Magnetics, IEEE Transactions on