A MESH-LESS METHOD FOR SOLVING AIR BEARING PROBLEMS IN HARD DISK DRIVES

摘要

In this paper, a mesh-less method, least square finite difference (LSFD) method, was applied to solve the slider air bearing problems in hard disk drives. The LSFD method derives from weighted least square approximation procedure and a Taylor series expansion of pressure distribution to directly discretize the Reynolds equation. The scheme is able to approximate the second-order derivatives to the second-order accuracy in this study. The mesh-free method does not require maintaining detailed structural information about the computational meshes in the computational domain. Furthermore, adaptive node distribution can prevents pressure oscillatory in the high-pressure gradient regions. In addition, Successive Over Relaxation iteration technique is applied to solve nonlinear system equations. Finally, the static flying attitude of the Taper Flat, Tripad and the Transverse Pressure Contour (TPC) sliders are calculated.