For a hard disk drive operating in a humid environment, the water vapor in the slider’s air bearing is typically compressed beyond its saturation vapor pressure, causing the vapor to condense. Consequently, the air bearing pressure decreases and the slider’s flying attitude adjusts to balance the forces from the suspension. A method for calculating this air bearing response to humid air is presented. Using one particular air bearing design as an example, several test cases are analyzed to illustrate the air bearing response for various temperatures and humidity levels. The calculated flying heights agree with those measured in commercial hard disk drives.
- Tribology Division
Simulating the Air Bearing Flying Height in a Humid Environment
Zhang, S, Strom, B, Lee, S, & Tyndall, G. "Simulating the Air Bearing Flying Height in a Humid Environment." Proceedings of the ASME/STLE 2007 International Joint Tribology Conference. ASME/STLE 2007 International Joint Tribology Conference, Parts A and B. San Diego, California, USA. October 22–24, 2007. pp. 1099-1101. ASME. https://doi.org/10.1115/IJTC2007-44493
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