The paper focuses on the numerical determination of Patir and Cheng’s flow factors for general roughness patterns. Improved procedures for the generation of surface roughness and flow simulation are presented. It is shown that application of these techniques resolves differences to analytical solutions of Elrod and Tripp and reduces the scatter in the results to a reasonable degree. Flow factor charts are given for the ‘standard’ Gaussian/Peklenik roughness and for sintered surfaces with high skewness.

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The paper presents the results of a numerical study concerning the combined effect of two-sided roughness and elasticity in a onedimewional slider bearing. Based upon the assumption that Reynolds' equation holds in the presence of roughness, and wing Christensen's stochastic models for two-sided roughness, it is established that there is a strong interaction between the roughness and elasticity. The elasticity acts so as to decrease the roughness ef1ects.