Modeling of Head-Disk Interface for Magnetic Recording
All the existing models of thin film gas lubrication developed for designing head sliders of hard disk drives are chronologically reviewed so as to show how each model was improved and finally generalized to treat gas lubrication flows for arbitrary Knudsen numbers. Each model is compared with the others using specific examples for benchmarking purposes. A possible approach to the modeling of head-disk interface is also proposed for further consideration that has the potential of addressing one of the extreme operations in which the reader/writer element of the head slider surfs through the lubricant on the disk.
KeywordsMagnetic recording Hard disk drives Head-disk interface Thin film gas lubrication Flying height Head slider Knudsen numbers Modeling
I should like to express my appreciation to Prof. Shigehisa Fukui of Tottori University for kindly providing me with useful references and comments.
- 3.S. Fukui, R. Kaneko, in Molecular Gas Film Lubrication (MGL), ed. by B. Bushan. Handbook of Micro/Nanotribology, (CRC Press, Boca Raton, 1995) pp. 559–604Google Scholar
- 4.A. Burgdorfer, The influence of the molecular mean free path on the performance of hydrodynamic gas lubricated bearings. Trans. ASME J. Basic Eng. 81, 94–100 (1959)Google Scholar
- 6.C. Cercignani, Rarefied Gas Dynamics—From Basic Concepts to Actual Calculations (Cambridge University Press, Cambridge, 2000)Google Scholar
- 8.M. Abramowitz, I.A. Stegan, in Handbook of Mathematical Functions (Dover, New York, 1968)Google Scholar