Effect of surface roughness on the static characteristics of inclined plane slider bearing: Rabinowitsch fluid model

Siddangouda, A.; Naduvinamani, N. B.; Siddapur, S. S.

doi:10.1080/17515831.2017.1347745

Cited by 6 publications

(5 citation statements)

References 22 publications

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“…• ω = 0: the NF case; and Some representative values being used for RF, porosity, and SR can be observed in many articles such as Lin [8], Walicka et al [32], and Siddangouda et al [9]. In addition, the following set of parameters is used when performing numerical calculations: RF nonlinear parameter: ω ∈ [−0.0002, 0.0002], roughness parameter: c * = 0, 0.1, 0.2, 0.3, 0.4 relative porous parameter: H * 0 = 0.0, 0.1, 0.2 and R * = 0.0, 0.1, 0.2.…”

Section: Resultsmentioning

confidence: 99%

“…Wada and Hayashi [6,7] were the first to study theoretically and experimentally the mechanism of journal bearing in the presence of pseudoplastic fluids. Furthermore, Lin [8] and Siddangouda et al [9] investigated the performance of parallel annular discs and static characteristics of an inclined plane slider bearing under the condition of RFM. These studies suggest that under RFM the bearing performance is influenced by the characteristics of the dilatant fluids, whereas the pseudo-plastic behaviour results in a lower concentration of bearing stability compared to NF.…”

Section: Introductionmentioning

confidence: 99%

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Semi-analytical approach-based studies of the squeeze film lubrication between rough porous annular discs: Rabinowitsch fluid model

Rahul,

Singh,

Tiwari

et al. 2023

Acta Polytech

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In recent years, there has been much interest in the effects of porosity and surface roughness (SR) or geometric irregularities between two moving plates under hydrodynamic lubrication. Porous bearings are used extensively in wide range of equipment, including computers, office equipment, home appliances, electric motors, and vehicles. In light of the importance of the aforementioned applications, we explored how SR and porous materials affect annular discs under the condition of a squeeze film. A five-point Gauss quadrature integral formula has been used to examine the characteristics of annular discs and a small perturbation method has been used to discretise the governing Rabinowitsch fluid flow (RFF) equations. The impact of nonlinear parameters on the behaviour of porosity and SR have been visualised in terms of film pressure (FP), load carrying capacity (LCC), and squeeze response time (SRT) of annular discs. Under the conditions of pseudoplastic and dilatant fluids, the effects of SR and porous materials between annular discs have been estimated in the form of the film pressure, LCC, and SRT and are presented in this manuscript as tables and graphs. According to the findings, the performance of an annular disc is significantly affected by porous material and radial roughness patterns. In addition, when RFF is carried through a rough surface and porous media, the performance is found to improve for dilatant fluids but suffer for pseudoplastic fluids.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Semi-analytical approach-based studies of the squeeze film lubrication between rough porous annular discs: Rabinowitsch fluid model

Rahul,

Singh,

Tiwari

et al. 2023

Acta Polytech

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“…Recently, Siddangouda et al used [22] Christensen's stochastic theory for the lubrication of rough surfaces, to derive an extended stochastic Reynolds-type equation and to investigate the efect of surface roughness on the static properties of an inclined plane slider-bearing lubricated with Rabinowitsch fuid. Tey are considered the two forms of one-dimensional roughness patterns (longitudinal and transverse).…”

Section: Introductionmentioning

confidence: 99%

Thermal and Surface Roughness Effects on Performance Analysis of Slider Bearing via Petrov–Galerkin Finite Element Method

Tessema

Derese

Tiruneh

2022

Mathematical Problems in Engineering

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In this study, the performance of slider bearing with impacts of temperature and roughness of surface on 1D longitudinal and transverse roughness type is investigated using the Streamline Upwind Petrov–Galerkin (SUPG)-finite element method (FEM). It is considered that the roughness is stochastic and Gaussian in random distribution. It is also considered that viscosity and density depend upon temperature. The domain’s irregularity caused by surface roughness is changed into a regular domain for numerical computation purposes. To determine the capacity of load-carrying and pressure distribution, the continuity, momentum, modified Reynolds, and energy equations are decoupled and solved by the SUPG-FEM. It can be demonstrated that in the case of the longitudinal model of nonparallel slider bearing, the load-bearing bearing capacity and drag force of friction due to the case i of the combined effects are lower than those attributable to the influence of surface roughness. Nevertheless, the thermal case’s impact on the 1D transverse type capacity of load-carrying capability and drag friction force is below that of the combined and surface roughness impact instances. The reverse is true for parallel slider bearings, however, for a 1D transverse type, the load-carrying ability is not particularly impressive.

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“…al. [32] on the static characteristics of an inclined plane slider-bearing lubricated with Rabinowitsch fluid. Rajeevkumar et al [33] described the dynamic behavior of non-Newtonian power-law, micropolar, and couple stress fluids and their influence on the efficiency of journal bearings.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Characteristics of Rough Porous Rayleigh Step Bearing Lubricated with Couple Stress Fluid

Naduvinamani

Angadi

2022

Lubricants

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In tribology, the Rayleigh step bearing has the maximum load capacity of any feasible bearing geometry. Traditional tribology resources have demonstrated that the Rayleigh step has an ideal geometry which maximizes load capacity. Both in nature and technology, rough and textured surfaces are essential for lubrication. While surface roughness enhances the performance of the bearings as an efficiency measure, it still has a significant impact on the load-carrying capacity of the bearing. In the present study, we investigate the dynamic characteristics of the Rayleigh step bearing with the impact of surface roughness and a porous medium by considering a squeezing action. Couple stress fluid is considered a lubricant with additives in both the film as well as the porous region. Based on Stokes constitutive equations for couple stress fluids, Darcy’s law for porous medium, and stochastic theory for rough surfaces, the averaged Reynolds-type equation is derived. Expressions are obtained for the volume flow rate, steady-state characteristics, and dynamic characteristics. The influence of surface roughness and the porous medium on the Rayleigh step bearing is analyzed. We investigated the static and dynamic characteristics of the Rayleigh step bearing. As a result, the couple stress fluid increases (decreases) the steady load-carrying capacity, dynamic stiffness, and dynamic damping coefficients, and decreases (increases) the volume flow rate negatively (positively) skewed roughness in comparison with that of the Newtonian case. The results are compared with those of the smooth case.

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Effect of surface roughness on the static characteristics of inclined plane slider bearing: Rabinowitsch fluid model

Cited by 6 publications

References 22 publications

Semi-analytical approach-based studies of the squeeze film lubrication between rough porous annular discs: Rabinowitsch fluid model

Semi-analytical approach-based studies of the squeeze film lubrication between rough porous annular discs: Rabinowitsch fluid model

Thermal and Surface Roughness Effects on Performance Analysis of Slider Bearing via Petrov–Galerkin Finite Element Method

Static and Dynamic Characteristics of Rough Porous Rayleigh Step Bearing Lubricated with Couple Stress Fluid

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