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Abstract: The effect of surface roughness on the static electricity
is analyzed through solving the verified Reynolds equation. Pressure
flow factor and shear flow factor are included in the verified Reynolds
equation. The effects of the nondimensional film thickness, Hs0, the
surface characteristics,g, the inverse Knudsen number, D0, and the
bearing number, ∧, on the load carrying capacity are discussed. And the
changing of pressure center is also investigated. As expected, the load
carrying capacity for various roughness approach the smooth load as the
ratio, Hs0, becomes greater and greater, and thus the roughness effect
is getting smaller and smaller. With the increasing of ∧ and D0 , the
roughness effect on the load decreases. Pressure center changes litter
while the surface roughness was influenced. The results show that the
roughness effect can not be ignored for the designing of the
high-density recording disk.
Key words: Magnetic recording system Surface roughness Static
electricity
CLC No: TH117.2
国家自然科学基金(59805003)和江苏省应用基础基金资助项目.
Received 20000825, received in revised form 20010815
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