Thermodynamic spreading behaviors of oil on rough surfaces of stainless steel 316L

Wang, Rong; Li, Si; Bai, Shaoxian

doi:10.1016/j.apsusc.2019.02.061

Cited by 4 publications

(3 citation statements)

References 40 publications

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“…The results obtained on stochastically rough surfaces were further supported by theoretical modelling [73,74], thus verifying that the migration velocity increases with an increase of the absolute surface temperature and surface roughness when considering a homogeneous surface temperature. For surfaces with a unidirectional temperature gradient, a reduced surface roughness leads to an increased migration velocity.…”

Section: Effect Of Surface Topography and Surface Chemistry On Lubric...supporting

confidence: 62%

Thermocapillary lubricant migration on textured surfaces - a review of theoretical and experimental insights

Grützmacher¹,

Jalikop²,

Gachot³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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Thermocapillary migration in tribological systems such as gearboxes, piston ring-liner assemblies, or bearings can lead to lubricant starvation and, consequently, to severe damages. Due to surface tension gradients induced by local temperature gradients on the frictionally heated surface, lubricant may flow out of the hotter contact zone to colder adjacent regions. In order to manipulate lubricant migration, several approaches exist to create migration barriers or to guide lubricant in a well-defined way back into the contact. These approaches are either based upon surface topography (designed surface textures) and/or surface chemistry (designed chemical patterns). In this review article, the state-ofthe-art regarding thermocapillary migration is summarized from a theoretical and experimental point of view. After a brief introduction, theoretical models are presented to introduce the underlying theory of droplet spreading and thermocapillary migration. Subsequently, the influence of surface textures and chemical patterns on thermocapillary migration and the possibilities to use these approaches to manipulate lubricant migration are discussed. After addressing applied research in this field and potential applications, current challenges and future research directions are presented before closing with general conclusions.

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Section: Effect Of Surface Topography and Surface Chemistry On Lubric...supporting

confidence: 62%

Thermocapillary lubricant migration on textured surfaces - a review of theoretical and experimental insights

Grützmacher¹,

Jalikop²,

Gachot³

et al. 2021

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

show abstract

“…Under the action of capillary, the liquid penetrates rapidly in the surface texture and the maximum instantaneous speed can reach 200–400 mm/s, which provides powerful conditions for the formation of Minimal Quantity Lubrication 4–7 . In addition to the surface texture, the capillarity is also affected by the temperature 5,8 . Owing to the interaction of the lubrication interfaces, a local high temperature usually exists in the contact area and a corresponding temperature gradient generates, which leads the lubricant to move from the high temperature region to the lower under the thermocapillary effect, and thereby affecting the lubrication effect 9–11 .…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7] In addition to the surface texture, the capillarity is also affected by the temperature. 5,8 Owing to the interaction of the lubrication interfaces, a local high temperature usually exists in the contact area and a corresponding temperature gradient generates, which leads the lubricant to move from the high temperature region to the lower under the thermocapillary effect, and thereby affecting the lubrication effect. [9][10][11] Therefore, the study of the thermo-penetrative spreading behaviours of liquid in the surface texture is significant to improve the lubrication effect of the interfaces.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐penetrative spreading behaviours of oil in lasered microgrooves on stainless steel 316L surfaces

Wang

Bai

2022

Lubrication Science

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The thermo-penetrative spreading behaviours of oil in microgrooves on stainless steel 316L surfaces were studied experimentally under temperature gradient conditions. An interface of smooth surface and microgrooved surface was designed to comparatively investigate the penetrative spreading of oil in microgrooves and the apparent spreading of oil on microgrooves and smooth surfaces. Then, microgrooves with different depths but a same width were laser processed to analyse the relationship between the actions of surface texture and temperature gradient on oil directional spreading. Results showed that the apparent oil on microgrooves extended directionally along the temperature gradient, leading to the lubricant loss from the high-temperature region to the lower, while the penetrative oil in microgrooves could spread rapidly from the low-temperature region to the higher under the obstruction of the thermocapillary effect, providing a potential method to enhance the lubrication.

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The effect of surface texturing on the laser-induced wetting behavior of AlSi5 alloy on Ti6Al4V alloy

Huang

et al. 2021

Applied Surface Science

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Thermodynamic spreading behaviors of oil on rough surfaces of stainless steel 316L

Cited by 4 publications

References 40 publications

Thermocapillary lubricant migration on textured surfaces - a review of theoretical and experimental insights

Thermocapillary lubricant migration on textured surfaces - a review of theoretical and experimental insights

Thermo‐penetrative spreading behaviours of oil in lasered microgrooves on stainless steel 316L surfaces

The effect of surface texturing on the laser-induced wetting behavior of AlSi5 alloy on Ti6Al4V alloy

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