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Research is being focused on to find the influence of surface variations such as texturing or grooving on the bearing performances. Though, earlier it was restricted to the theoretical aspects alone, however, with the help of advance manufacturing techniques (laser surface texturing, etching, special grinding process, etc.), it has become possible to produce micro-textures or grooves on the surface of journal bearing. The objective of the present study is to numerically compare the influence of spherical texture and micro-grooving (longitudinal and transverse) on friction coefficient and average temperature of journal bearing at low and high eccentricity ratios. From the findings, it has been observed that the micro-grooving reduces the friction coefficient and average temperature is maximum in comparison with spherical texture.

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Present study has been conducted to examine the effect of laser surface texturing combined with couple stress fluids on the hydrodynamic lubrication of finite journal bearing in this work. The JFO (Jakobsson, Floberg and Olsson) boundary conditions have been engaged instead ofReynolds boundary conditions to achieve realistic results. Moreover, the results were computed and well-authenticated with the previous published work. It has been observed that load carrying capacity gets increased with couple stresses for smooth journal bearings at different eccentricity ratios. However the increment in load carrying capacity with texture affects only at low eccentricity ratios. The combined effects of texturing with couple stress fluids lower the performance of journal bearing at different eccentricity ratios.

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