Generalized Reynolds Equation for Micropolar Lubricants and its Application to Optimum One-Dimensional Slider Bearings: Effects of Solid-Particle Additives in Solution

Shukla, J.B.; Isa, Mohammad

doi:10.1243/jmes_jour_1975_017_040_02

Cited by 50 publications

(28 citation statements)

References 5 publications

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“…The rate of lubricant flow discharging from the two ends of the bearing is determined from Qz= C (15) The integration is carried out along the film thickness. The dimensionless expression corresponding to Eq.…”

Section: Pressure Induced Flow Termsmentioning

confidence: 99%

“…Allen and Kline [1] considered a two-dimensional flow field of micropolar fluids and applied it towards the problem of bearings. Shukla and Isa [15] derived the generalized Reynolds equation for micropolar fluids with application to one-dimensional slider bearings. Prakash and Sinha [14] considered the infinitely long journal bearing with micropolar fluids.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a misaligned journal bearing for micropolar fluid considering cavitation and starvation effects

Lin¹

1994

Journal of the Chinese Institute of Engineers

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An analysis is provided in this paper for hydrodynamic, micropolar lubrication of a misaligned journal bearing. The numerical procedure used has incorporated a cavitation algorithm, which automatically predicts film rupture and reformation in the bearings. The analysis is performed on a finite width grooved journal bearing for both starvation supply pressure and higher lubricant supply pressure inlet conditions. The larger particle and the higher viscosity of the additives delaying the film reformation boundary is confirmed by the experimental results, despite the fact that the particle size and viscosity of the additives do not influence the location of film rupture. #M%k

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Section: Pressure Induced Flow Termsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of a misaligned journal bearing for micropolar fluid considering cavitation and starvation effects

Lin¹

1994

Journal of the Chinese Institute of Engineers

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“…Several investigators used the micropolar fluid theory for the study of several bearing systems. The generalized Reynolds equation for micropolar lubricants is derived by Shukla and Isa [13]. They found that the maximum load carrying capacity and corresponding frictional force increase with increase of the parameter characterising the microstructure imparted to the lubricants by the presence of additive.…”

Section: Introductionmentioning

confidence: 99%

Combined Effects of Viscosity Variation and Surface Roughness on the Squeeze Film Lubrication of Journal Bearings with Micropolar Fluids

et al. 2014

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In this paper, a theoretical study of the combined effects of viscosity variation and surface roughness on the squeeze film performance of journal bearings lubricated with micropolar fluid is made. The modified averaged Reynolds equation for micropolar fluids accounting for the randomized surface roughness structure and variation of viscosity is mathematically derived. The Christensen's stochastic theory for hydrodynamic lubrication of rough surfaces is used to study the effect of two types of one dimensional surface roughness patterns on the squeeze film characteristics of a journal bearing with micropolar fluid. Closed form expressions for the mean pressure load carrying capacity are obtained for the infinitely short journal bearing. It is observed that, the transverse surface roughness pattern improves the squeeze film characteristics where as the adverse effects are observed for the one-dimensional longitudinal surface roughness pattern. The effect of variation of viscosity in micropolar fluid on the squeeze film characteristic of rough short journal bearings is analyzed.

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“…In 1972, Eringen [2] also proposed the theory of thermomicro fluids, and succeeded in interpreting the behavior of some kinds of non-Newtonian fluids. In 1975, Shukla and Isa [3] presented the generalized Reynolds equation for micropolar fluids with the application to one-dimensional slider bearings. Meanwhile, Prakash and Sinha [4] analyzed the infinitely long journal bearing, with the lubrication of micropolar fluids.…”

mentioning

confidence: 99%

Bifurcation and chaos for porous squeeze film damper mounted rotor–bearing system lubricated with micropolar fluid

Chang‐Jian

Kuo

2009

Nonlinear Dyn

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This study presents a dynamic analysis of a flexible rotor supported by two porous squeeze micropolar fluid-film journal bearings with nonlinear suspension. The dynamics of the rotor center and bearing center are studied. The analysis of the rotorbearing system is investigated under the assumptions of non-Newtonian fluid and a short bearing approximation. The spatial displacements in the horizontal and vertical directions are considered for various nondimensional speed ratios. The dynamic equations are solved using the Runge-Kutta method. The methods of analysis employed in this study are inclusive of the dynamic trajectories of the rotor center and bearing center, power spectra, Poincaré maps, and bifurcation diagrams. The maximum Lyapunov exponent analysis is also used to identify the onset of chaotic motion. The numerical results show that the stability of the dynamic system varies with the nondimensional speed ratios, the nondimensional parameter, and permeability. The modeling results obtained by using the method proposed in this paper can be employed to predict the

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Generalized Reynolds Equation for Micropolar Lubricants and its Application to Optimum One-Dimensional Slider Bearings: Effects of Solid-Particle Additives in Solution

Cited by 50 publications

References 5 publications

Analysis of a misaligned journal bearing for micropolar fluid considering cavitation and starvation effects

Analysis of a misaligned journal bearing for micropolar fluid considering cavitation and starvation effects

Combined Effects of Viscosity Variation and Surface Roughness on the Squeeze Film Lubrication of Journal Bearings with Micropolar Fluids

Bifurcation and chaos for porous squeeze film damper mounted rotor–bearing system lubricated with micropolar fluid

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