Using numerical simulations, the effect of surface roughness on elastohydrodynamic lubrication (EHL) under simple sliding point contacts is investigated. Transverse roughness is on the stationary surface. Four fluid flow models, i.e. thermal Newtonian, isothermal Newtonian, thermal Eyring, and isothermal Eyring models, are employed in the analyses. The effects of temperature rise, lubricant rheology, and amplitude and wavelength of asperities on micro-EHL films are elucidated. Behaviours of oil films with short wavelength of asperities are found to be complex. The deformations of asperities are also compared under the four fluid flow models.
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