To quantitatively predict the static, and dynamic characteristics of a head slider while flying over a patterned disk, the mixedly averaging method has been successfully applied to the molecular gas lubrication problem incurred by groove-shaped textures formed over the lubricating surface. First, formulation of ADI method by using mixedly averaged film thickness is derived and implemented into an interactive numerical simulation system. Then, spacing variations of typical sliders on a patterned disk surface are demonstrated.

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