On the Velocity Profile of Couette Flow of Lubricant Within a Micro/Submicro Gap

Han, Suli; Guo, Feng; Shao, Juan; Bai, Qinghua; Han, Lei

doi:10.1007/s11249-019-1224-1

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Cited by 3 publications

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“…Velocity profiles of lubrication film may be obtained by photobleached imaging, e.g. see Ponjavic et al [36] and Han et al [37]. These techniques would help to valid the scale and thermal effects in this study.…”

Section: Discussionmentioning

confidence: 95%

Scale and contact geometry effects on friction in thermal EHL: twin-disc versus ball-on-disc

Liu

Zhang

Bader

et al. 2021

Tribology International

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Section: Discussionmentioning

confidence: 95%

Scale and contact geometry effects on friction in thermal EHL: twin-disc versus ball-on-disc

Liu

Zhang

Bader

et al. 2021

Tribology International

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Experimental Study of the Interfacial Slip on Hydrodynamic Lubrication Under Different Wettabilities

Han,

Guo,

Shao

et al. 2024

Lubrication Science

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This article presents an experimental study about boundary slippage on the film thickness of hydrodynamic lubrication (HL) using a custom‐made slider‐on‐disc bearing testing apparatus. The interfaces with different affinity were obtained by surface energy modification of sliders with various oleophobic coatings, which are characterised by their contact angle (CA) and contact angle hysteresis (CAH). To study the mechanism of interfacial slip on HL under different wettability constraints, the film thickness and velocity profiles under shear were measured using interference and fluorescence photobleached method, respectively. The results showed that the CAH could better characterise the influence of interface effect on the film thickness of HL, which was explained by the correlation between CAH and the interface potential barrier. Furthermore, it was found that the slip velocity increased with lubricant viscosity and shear rate, which can be explained by the spatial heterogeneity of the flow in conformal contact and the critical shear stress slip model.

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Quantitative Measurement of Squeeze Flow Distribution in Nanogaps by Particle Image Velocimetry Using Quantum Dots

Azuma,

Ozeki,

Miki

et al. 2023

Tribol Lett

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On the Velocity Profile of Couette Flow of Lubricant Within a Micro/Submicro Gap

Cited by 3 publications

References 27 publications

Scale and contact geometry effects on friction in thermal EHL: twin-disc versus ball-on-disc

Scale and contact geometry effects on friction in thermal EHL: twin-disc versus ball-on-disc

Experimental Study of the Interfacial Slip on Hydrodynamic Lubrication Under Different Wettabilities

Quantitative Measurement of Squeeze Flow Distribution in Nanogaps by Particle Image Velocimetry Using Quantum Dots

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