Tribological behaviour of surfaces with stepped wettability under limited lubricant supply

Liu, C.L.; Guo, Feng; Wong, P.L.; Li, X.M.

doi:10.1016/j.triboint.2019.105880

Cited by 30 publications

(16 citation statements)

References 24 publications

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“…They used a combination of low surface energy polytetrafluoroethylene (PTFE) and high surface energy polymethyl-methacrylat (PMMA) to prepare heterogeneous slip/ no-slip surface. Liu et al [109] used fluorosilane as a low surface energy coating on steel and glass samples. They observed the effect of stepped wettability on friction and wear under limited lubricant supply condition.…”

Section: Author Assumptions Resultsmentioning

confidence: 99%

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

et al. 2020

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Numerous published studies on the non-wettable surfaces with surface texture and slip conditions have been reviewed comprehensively to evaluate the performance of hydrodynamic bearings from last two decades. The recent numerical and experimental studies have been explored to observe the individual and combined influence of surface texture and slip. A variety of texture shapes and optimized slip zone profiles have also been discussed in this article. It has been observed from the literature that a suitable combination of modified slip and the conventional no-slip zone is effective in improving dynamic and static performance of hydrodynamic bearings. Many experimental studies also revealed that micro-scale textures are significantly capable of improving the tribological performance. Moreover, slip boundary condition is more beneficial at low and medium eccentricity ratios.

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Section: Author Assumptions Resultsmentioning

confidence: 99%

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

et al. 2020

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“…Previous experimental studies are saying that these low surface energy coatings are commonly liquid repellent in nature and shows slip boundary condition at the liquid-solid interface (Rothstein, 2010; Senatore and Rao, 2018; Arif et al , 2020). It has been observed that surfaces with both slip and conventional no-slip boundary conditions effect act as a reservoir of lubricant and increases the efficiency of lubricated tribo-contacts (Liu et al , 2020).…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of different slip zone locations on the lubrication performance of textured journal bearings

Arif

Kango

Shukla

2021

ILT

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Purpose This study aims to purpose the suitable location of slip boundary condition and microscale surface textures to enhance the tribological performance of the hydrodynamic journal bearings. Design/methodology/approach Mass conserving Elrod cavitation algorithm with considering slip boundary condition has been used for predicting the static performance characteristics (load carrying capacity, coefficient of friction and volumetric inflow rate) of finite cylindrical shape textured journal bearings. Findings It has been observed that the full textured bearing with slip boundary condition in between 0°–180° circumferential region gives a significant reduction in the lubricant rupture zone. However, the introduction of textures up to the interface of slip and the no-slip region is increasing the load-carrying capacity and reduces the shear stress. This reduction in shear stress with combined slip and surface textures is effective in increasing the volumetric inflow rate of the lubricant. Practical implications The combined effect of slip boundary condition and surface texturing is increasing the scope of liquid lubricants in hydrodynamic journal bearings and further contributing toward the development of small-scale rotating machines. Originality/value The study related to the use of mass conserving Elrod cavitation algorithm for finding the optimum location of slip and surface texture zones has been found rare in the literature. Previous studies show that the mass conserving Elrod cavitation algorithm gives realistic results for textured bearings and its findings show good agreement with the experimental observations.

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“…Jacod et al [6] found that replenishment mainly occurred near the contact driven by capillary forces. Other factors, such as centrifugal effects [4], angled surface velocities [7], wettability [8], and oil-air lubrication [9], have also been discussed to enhance the understanding of oil replenishment. All the above mentioned studies were mainly based on a single ball-on-disc point model.…”

Section: Introductionmentioning

confidence: 99%

Influence of the cage on the migration and distribution of lubricating oil inside a ball bearing

Wang

2021

Friction

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The migration and distribution of lubricant oil in a rolling bearing strongly affect the elastohydrodynamic lubrication performance between the balls and rings. However, oil re-lubrication is highly dependent on the bearing design, which is different from the ball-on-disc model. This study directly observed the distribution of the lubricant film in a custom-made model-bearing rig, with an outer ring replaced by a glass ring to allow full optical access. The influence of the cage type and surface properties were presented. The physical origin of the re-lubrication mechanism, including capillary flow and mechanical redistribution, was discussed.

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Tribological behaviour of surfaces with stepped wettability under limited lubricant supply

Cited by 30 publications

References 24 publications

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

Implication of Surface Texture and Slip on Hydrodynamic Fluid Film Bearings: A Comprehensive Survey

Investigating the effect of different slip zone locations on the lubrication performance of textured journal bearings

Influence of the cage on the migration and distribution of lubricating oil inside a ball bearing

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