Direct simulation Monte Carlo for thin‐film bearings

The direct simulation Monte Carlo (DSMC) scheme is used to study the gas flow under a read/write head positioned nanometers above a moving disk drive platter (the slider bearing problem). In most cases, impressive agreement is found between the particle‐based simulation and numerical solutions of th...

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Bibliographic Details
Published in:Physics of fluids (1994) 1994-12, Vol.6 (12), p.3854-3860
Main Authors: Alexander, Francis J., Garcia, Alejandro L., Alder, Berni J.
Format: Article
Language:English
Subjects:
661300 - Other Aspects of Physical Science- (1992-)
BEARINGS
CALCULATION METHODS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTER ARCHITECTURE
COMPUTER CALCULATIONS
FILM FLOW
FLUID FLOW
FLUIDS
GAS FLOW
GASES
LUBRICATION
MONTE CARLO METHOD
NUMERICAL SOLUTION
RAREFIED GASES
SLIP FLOW
THIN FILMS
VISCOUS FLOW
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Summary:The direct simulation Monte Carlo (DSMC) scheme is used to study the gas flow under a read/write head positioned nanometers above a moving disk drive platter (the slider bearing problem). In most cases, impressive agreement is found between the particle‐based simulation and numerical solutions of the continuum hydrodynamic Reynolds equation which has been corrected for slip. However, at very high platter speeds the gas is far from equilibrium, and the load capacity for the slider bearing cannot be accurately computed from the hydrodynamic pressure.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.868377