Surface texturing has been recognized as a very efficient means of modifying the tribological performance of sliding surfaces. Recently, computational fluid dynamics (CFD) has been used to investigate the optimum geometries of the texture in hydrodynamic lubrication. In numerical studies, the shape of the texture is often assumed to be a rectangle or circle with a smooth surface (modeled texture). However, in an actual textured surface processed by sandblast or laser processing (processed texture), non-uniformity of the shape, burrs, and surface roughness exist. Therefore, CFD analysis using modeled texture may show different results from the actual phenomenon. In our research, tribological properties such as friction coefficient and load capacity are investigated with both modeled and processed textures based on CFD analysis. From the simulation results, little difference was found in the friction coefficients. Further analyses are needed for the flow field with the texture to clarify the detailed mechanism for improving tribological properties. Hence, we performed various simulations, for example, changing edge of texture, applying burrs and interaction effects between dimples. In this paper, the effects of the burrs are discussed from the simulation results performed with the modeled texture and burrs.
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