Modeling and analysis of interfacial electro-kinetic effects on thin film lubrication

Bai, Shaoxian; Huang, Ping; Meng, Yonggang; Wen, Shizhu

doi:10.1016/j.triboint.2005.12.004

Cited by 24 publications

(24 citation statements)

References 9 publications

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“…In fact, according to the comparison between Bai's and Zhang's models in Ref. [7], the apparent viscosity from Zhang's model always increases with the decrease of the film thickness, but in contrast the apparent viscosity from Bai's model reaches a peak value when the film thickness is equal to five times of the EDL characteristic thickness j À1 . Obviously, the Bai's model is more reasonable because when the film thickness is approximately equal to five of times j -1 or less, the two diffusion layers of the EDLs in the lubrication regime begin to overlap and become thinner.…”

Section: The Basic Thermal Ehl Theory Considering the Edl Effectmentioning

confidence: 98%

“…However, soon after that, Bai et al [7] developed a new mathematical model about the EDL effect, which unlike the Zhang's model, the influence of film thickness on the streaming potential gradient was considered. The apparent viscosity from Bai's model is given by…”

Section: The Basic Thermal Ehl Theory Considering the Edl Effectmentioning

confidence: 99%

“…[7]. In addition, a series of experiments with the aqueous lubrication and the oil film lubrication on a composite sliding block tester were also carried out for further investigations of EDL effect by them [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of the Electric Double Layer on Very Thin Thermal Elastohydrodynamic Lubricating Film

2012

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The effect of the electric double layer (EDL) of friction surface on lubrication is significant under the condition of very thin lubricating film. This article presents a theoretical evaluation concerning the effect of the EDL on the film thickness and the pressure distribution of the elastohydrodynamic lubricating water film. These numerical analyses are based on the modified Reynolds equation that considers the EDL. Owing to the temperature risen readily in elastohydrodynamic lubrication (EHL) contact area, the influence of the temperature rise on the EDL effect was also investigated. The analysis results show that the EDL leads to a noticeable increase in the film thickness but has few influences on the pressure. Further, the analytical comparisons between isothermal and thermal conditions reveal that the temperature rise in the contact area weakens the effect of the EDL on the EHL film. Overall, consideration of the EDL effect gives a thicker EHL film, but once the temperature rise in the EHL regime is taken into account, the film thickness is correspondingly decreased.

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Section: The Basic Thermal Ehl Theory Considering the Edl Effectmentioning

confidence: 98%

Section: The Basic Thermal Ehl Theory Considering the Edl Effectmentioning

confidence: 99%

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The Effect of the Electric Double Layer on Very Thin Thermal Elastohydrodynamic Lubricating Film

2012

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“…Kelsall et al [18] suggested that increased double-layer repulsion could reduce the friction coefficient and wear because the interfacial potential of a material surface is closely related to the tribological performance. Bai et al [31] and other researchers [32,33] noted that the electric double layer at very thin lubricating films lead to an electrokinetic effect by which the surface near viscosity is increased [34]. As consequence, hydrodynamic lubrication is partly ensured and the friction coefficient is reduced.…”

Section: Introductionmentioning

confidence: 94%

Influence of Electrochemical Potentials on the Tribological Behavior of Silicon Carbide and Diamond-Coated Silicon Carbide

2015

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Due to their high corrosion stability in combination with advantageous tribological performance, sintered silicon carbide ceramics are widely used in industrial applications. Both the corrosion stability and the tribological behavior can be affected by electrochemical processes. Tribological investigations were carried out using an electrochemical three electrode setup. The influence of electrochemical potentials on the friction and wear behavior of different sintered SiC materials in 1 M NaClsolution was investigated to analyze the complex interplay between mechanical, chemical, and electrochemical interactions during tribo-corrosion. The results revealed that friction and wear of SiC were decreased under cathodic electrochemical polarization depending on the material composition. In addition, tribological tests at different electrochemical potentials showed that the coefficient of friction can be switched immediately. The results indicated that the tribological behavior is strongly affected by the increased double-layer repulsion due to the electrochemical potentials, which supports the hydrodynamic lubrication.

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“…Li [9] theoretically studied the combined roles of EDL and surface roughness on the hydrodynamic lubrication. Huang and his colleagues [8,10,13] systematically studied the effects of EDL on the hydrodynamic lubrication or elasto-hydrodynamic lubrication, where the effect of zeta potential was analyzed. All these studies revealed that the EDL can significantly affect the lubrication capacity, especially when the Debye length (an important parameter to manifest the thickness of the EDL) of the EDL is similar to the thickness of the lubricant film.…”

Section: Introductionmentioning

confidence: 99%

The effect of the electrical double layer on hydrodynamic lubrication: a non-monotonic trend with increasing zeta potential

Jing¹,

Pan²,

Wang³

2017

Beilstein J. Nanotechnol.

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In the present study, a modified Reynolds equation including the electrical double layer (EDL)-induced electroviscous effect of lubricant is established to investigate the effect of the EDL on the hydrodynamic lubrication of a 1D slider bearing. The theoretical model is based on the nonlinear Poisson–Boltzmann equation without the use of the Debye–Hückel approximation. Furthermore, the variation in the bulk electrical conductivity of the lubricant under the influence of the EDL is also considered during the theoretical analysis of hydrodynamic lubrication. The results show that the EDL can increase the hydrodynamic load capacity of the lubricant in a 1D slider bearing. More importantly, the hydrodynamic load capacity of the lubricant under the influence of the EDL shows a non-monotonic trend, changing from enhancement to attenuation with a gradual increase in the absolute value of the zeta potential. This non-monotonic hydrodynamic lubrication is dependent on the non-monotonic electroviscous effect of the lubricant generated by the EDL, which is dominated by the non-monotonic electrical field strength and non-monotonic electrical body force on the lubricant. The subject of the paper is the theoretical modeling and the corresponding analysis.

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Modeling and analysis of interfacial electro-kinetic effects on thin film lubrication

Cited by 24 publications

References 9 publications

The Effect of the Electric Double Layer on Very Thin Thermal Elastohydrodynamic Lubricating Film

The Effect of the Electric Double Layer on Very Thin Thermal Elastohydrodynamic Lubricating Film

Influence of Electrochemical Potentials on the Tribological Behavior of Silicon Carbide and Diamond-Coated Silicon Carbide

The effect of the electrical double layer on hydrodynamic lubrication: a non-monotonic trend with increasing zeta potential

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