Theoretical and experimental research on the friction coefficient of water lubricated bearing with consideration of wall slip effects

Xie, Zhongliang; Rao, Zhushi; Liu, Ling; Chen, Rugang

doi:10.1051/meca/2015039

Cited by 24 publications

(8 citation statements)

References 37 publications

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“…The main reason may be that the minimum contact angle of ethylene glycol on four pipe walls is 53.77° which implies that the molecular force on the solid–liquid interface is relatively less than that between the liquid, and it is easier to form a thin layer of liquid molecules. Therefore, it is easier to drive the wall–liquid molecule by an external force and the forming wall slip velocity is larger …”

Section: Results and Discussionmentioning

confidence: 99%

Effect of Pipe Surface Wettability on Flow Slip Property

Liang

Jiang

et al. 2018

Ind. Eng. Chem. Res.

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The effect of surface wettability on the slip property continues to be a controversial subject. In this regard, the contact angles and sliding angles of ethylene glycol, tap water, and #26 white oil deposited on plexiglass pipe, 304 stainless-steel pipe, polytetrafluoroethylene pipe, and polypropylene pipe surfaces were determined using a contact angle meter. The slip velocity, slip length, shear stress, and flow increment of the three liquids flowing in the four pipes were calculated using the slip boundary condition, which refers to the laminar flow resistance of a liquid in a fully developed section of a no-slip pipe under a constant pressure drop. The results show that the main characteristic of slip flow at a solid–liquid interface is that at a constant average velocity of the liquid, the wall shear stress decreases with an increase of the contact angle and a decrease of the sliding angle. This in turn, increases the slip velocity and the slip length and results in lower flow resistance of the liquid. The negative slip phenomenon exists at low-speed flow for part of the liquid, which is different from the linear slip length model. The slip length does not tend to be constant until the average velocity increases to a certain value.

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Section: Results and Discussionmentioning

confidence: 99%

Effect of Pipe Surface Wettability on Flow Slip Property

Liang

Jiang

et al. 2018

Ind. Eng. Chem. Res.

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“…The pressure in the fluid in the mixed lubricated area shares the normal load with contacted asperities. Figure 5 showed that the resistant force, i.e., friction, was the sum of the resistances at asperity contacts and the EHL layer [68]. Payvar and Salant [69] proposed the cavitation index to measure the shared load in mechanical seals.…”

Section: Resistance Of Elastohydrodynamic Lubrication (Ehl)mentioning

confidence: 99%

State of the art of friction modelling at interfaces subjected to elastohydrodynamic lubrication (EHL)

Mueller

Zhang

2020

Friction

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Elastohydrodynamic lubrication (EHL) is a type of fluid-film lubrication where hydrodynamic behaviors at contact surfaces are affected by both elastic deformation of surfaces and lubricant viscosity. Modelling of contact interfaces under EHL is challenging due to high nonlinearity, complexity, and the multi-disciplinary nature. This paper aims to understand the state of the art of computational modelling of EHL by (1) examining the literature on modeling of contact surfaces under boundary and mixed lubricated conditions, (2) emphasizing the methods on the friction prediction occurring to contact surfaces, and (3) exploring the feasibility of using commercially available software tools (especially, Simulia/Abaqus) to predict the friction and wear at contact surfaces of objects with relative reciprocating motions.

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“…The measuring accuracy of the force sensor was 0. values fluctuate periodically with time with a small amplitude. A more detailed description of the test bearing can be found in the reference [34,35]. Figure 6a-d shows the 3D morphology distribution of the four test bearings.…”

Section: Symbol Value Dimensionmentioning

confidence: 99%

“…This occurred because of the existence of the circumferential grooves and the surface topography. Xie et al [34][35][36] explored the lubrication states, lubrication performance with consideration of the bushing macro deformation using theoretical simulation and experimental verification. Their results indicated that the surface roughness had a significant influence on the lubrication state transition and the lubrication performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Topography and Structural Parameters on the Lubrication Performance of a Water-Lubricated Bearing: Theoretical and Experimental Study

2019

Self Cite

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This study explored the influence of the surface topography of a bushing on the lubrication performance of a water-lubricated bearing. Bushing deformations were considered in the mathematical model. Theoretical calculations and experiments were performed. The test data corresponded well with the simulation. The main stiffness and cross stiffness coefficients were measured and compared with the theoretical values, and the empirical formula of friction coefficient was fitted based on the test data.

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Theoretical and experimental research on the friction coefficient of water lubricated bearing with consideration of wall slip effects

Cited by 24 publications

References 37 publications

Effect of Pipe Surface Wettability on Flow Slip Property

Effect of Pipe Surface Wettability on Flow Slip Property

State of the art of friction modelling at interfaces subjected to elastohydrodynamic lubrication (EHL)

Effect of Surface Topography and Structural Parameters on the Lubrication Performance of a Water-Lubricated Bearing: Theoretical and Experimental Study

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