Friction characteristics of microtextured surfaces under mixed and hydrodynamic lubrication

By Ashwin Ramesh, Wasim Akram, S. Mishra, A. Cannon, A. Polycarpou, W. P. King. 2013

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Efficiency of laser surface texturing in the reduction of friction under mixed lubrication (2014, background): “A second investigation under mixed lubrication in unidirectional sliding conditions (85W-140 gear oil), found the optimum at 100–200 mm diameter dimples and a depth of 105 mm [19].”
Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives (2019, background): “It has been numerically and experimentally shown that when the structural depth is in the same range as the resulting lubricant film thickness, the greatest effects in terms of an additional pressure build-up can be expected [21,34,36,240].”
Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review (2021, methodology): “Boosted by the work of Etsion and co-workers in the 90’s [16, 22, 23], surface textures have been shown capable of beneficially affecting friction and wear under dry friction conditions [24, 25] as well as boundary [26-29], mixed [30-33], elastohydrodyamic (EHL) [34-36] and full-film hydrodynamic lu”