A Simulation Method for Hydrodynamic Lubrication of Surfaces with Two-Dimensional Isotropic or Anisotropic Roughness Using Mixed Average Film Thickness

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概要

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• A new method is presented for simulating hydrodynamic lubrication with two-dimensional roughness. As a result of utilizing the concept of flow conductance in lubricating film with a unit two-dimensional roughness or a regular series of the unit roughness, it is found that a smooth surface equivalent to the rough one is given by mixed average film thickness of arithmetic and harmonic average film thickness. A mixed average Reynolds equation for the rough surface is derived, where mixing ratios for averaging film thickness can be determined by using the unit roughness with symmetrical film thickness. The equation is justified by comparison with results computed from real rough film thickness. This method is applied to some selected isotropic and anisotropic roughnesses. The most important conclusion is that micro topography of a unit roughness governs the total surface roughness effects.

• 一般社団法人日本機械学会の論文

著者

• Mitsuya Yasunaga

  Magnetic Storage Equipment Section Musashino Electrical Communication Laboratory Nippon Telegraph An

関連論文

• A Simulation Method for Hydrodynamic Lubrication of Surfaces with Two-Dimensional Isotropic or Anisotropic Roughness Using Mixed Average Film Thickness

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