A Numerical Scheme for Static and Dynamic Simulation of Subambient Pressure Shaped Rail Sliders
Affiliation:
1. Conner Peripherals, 3061 Zanker Road, San Jose, CA 95134 2. Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California, Berkeley, CA 94720
Abstract
A numerical scheme based on the finite difference technique is developed to simulate the steady-state flying conditions and dynamic responses of subambient pressure sliders with shaped rails. In order to suppress numerical difficulties caused by the clearance discontinuities present in the subambient pressure sliders, the control volume formulation of the linearized generalized lubrication equation is utilized. For the shaped rail sliders, a method of averaging the mass flow across the rail boundaries is implemented. Furthermore, the power-law scheme by Patankar, is implemented in calculating the mass flows. The resulting equation is solved using the alternating direction implicit method. For the simulation of steady-state flying conditions, a variable time step algorithm is implemented for the purpose of reaching the steady-state values as quickly as possible. This numerical scheme is very efficient in that the coarse finite difference mesh is sufficient for numerical stability, and that the time step changer very much improves the convergence rate. The static flying heights of the Transverse Pressure Contour and the “Guppy” slider are calculated for different disk velocities and slider skew angles. For the Guppy slider, the dynamic responses of the slider to a cosine bump and disk runout are simulated.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference19 articles.
1. Crone
R. M.
, JhonM. S., BhushanB., and KarisT. E., 1991, “Modeling the Flying Characteristics of a Rough Magnetic Head over a Rough Rigid-Disk Surface,” ASME JOURNAL OF TRIBOLOGY, Vol. 113, pp. 739–749. 2. Deckert, K. L., Bolasna, S. A., and Nishihira, H. S., 1987, “Statistics of Slider Bearing Flying Height,” Tribology and Mechanics of Magnetic Storage Systems, STLE Special Publications, SP-22, pp. 1–5. 3. Dennis, J. E., and Schnabel, R. B., 1983, Numerical Methods for Unconstrained Optimization and Nonlinear Equations, Prentice-Hall, Englewood Cliffs, NJ. 4. Doss
S.
, and MillerK., 1979, “Dynamic ADI Methods for Elliptic Equations,” SIAM Journal of Numerical Analysis, Vol. 16, No. 5, Oct., pp. 837–856. 5. Fukui
S.
, and KanekoR., 1988, “Analysis of Ultra-Thin Gas Film Lubrication Based on Linearized Boltzmann Equation: First Report-Derivation of a Generalized Lubrication Equation Including Thermal Creep Flow,” ASME JOURNAL OF TRIBOLOGY, Vol. 110, pp. 335–341.
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