Static characteristics of a fluid film bearing with TiO2 based nanolubricant using the modified Krieger–Dougherty viscosity model and couple stress model

Binu, K G; Shenoy, Bhaskar; Rao, D. Srikanth; Pai, Raghuvir

doi:10.1016/j.triboint.2014.03.013

Cited by 41 publications

(52 citation statements)

References 30 publications

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“…The motion of blood base nanofluid is taken along the x -direction in the absence of body couples. The continuity and momentum equation of the CSNF and energy equation, are given by [46], [47]:…”

Section: Mathematical Modeling and Solution Of The Problemmentioning

confidence: 99%

A Time Fractional Model With Non-Singular Kernel the Generalized Couette Flow of Couple Stress Nanofluid

et al. 2020

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The aim of the present work is to calculate the closed form solutions of the unsteady couple stress nanofluids flow in a channel. Couple stress nanofluids (CSNF) is allowed to pass through the parallel plates separated by a distance h. In this study, we choose blood as base fluid with gold nanoparticles suspension. The lower plate is at rest and the upper plate is suddenly moved with constant velocity U 0. Recently, Atangana-Baleanu (AB) introduced a new definition of fractional derivatives. This AB definition of fractional derivative has been applied to the present couple stress nanofluid (CSNF) model. The closed form solutions of present CSNF model via AB approach are obtained by using the Laplace and finite Fourier sine transforms. Exact results of velocity and temperature are displayed and discussed for different parameters of interest. Solutions obtained here are reduced to three different cases in limiting sense i.e. (i) fractional couple stress nanofluid without external pressure gradient. (ii) ordinary couple stress nanofluid. (iii) regular couple stress fluid. Finally, skin friction and Nusselt number are evaluated at lower and upper plates and listed in tabular forms. The results show that increasing external pressure gradient, CSNF velocity increases whereas decreases by increasing Reynolds number. Increasing volume fraction slow down the CSNF velocity. The velocity of Newtonian viscous fluid is higher than CSNF velocity.

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Section: Mathematical Modeling and Solution Of The Problemmentioning

confidence: 99%

A Time Fractional Model With Non-Singular Kernel the Generalized Couette Flow of Couple Stress Nanofluid

et al. 2020

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“…Horizontal and vertical components of the dynamic load due to dynamic pressures p¯1 and p¯2 are given respectively as 39 …”

Section: Theorymentioning

confidence: 99%

Effect of couple stress parameter on steady-state and dynamic characteristics of three-lobe journal bearing operating on TiO₂ nanolubricant

Kumar

Kakoty

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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Steady-state and dynamic performance parameters of three-lobe fluid film bearing, operating on TiO2 nanolubricant have been obtained. The effective viscosity for a given volume fraction of TiO2 nanoparticle in base fluid is obtained by using Krieger–Dougherty viscosity model. Various bearing performance parameters are obtained by solving remodeled Reynolds equation, which includes couple stress parameter. The stiffness and damping coefficients are also obtained for different values of the couple stress parameter. Results show a significant rise in the nondimensional load-carrying capacity and flow coefficient while there is a decrease in friction variable. It also reveals a significant improvement in the dynamic coefficient of bearing.

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“…The results indicated that dispersing TiO 2 nanoparticles in engine oil can reduce end-leakage as well as friction, thus improving the load capacity of the bearing featuring negative radial and tilt adjustments. Binu et al [179] used the modified Krieger-Dougherty viscosity model to incorporate the nanoparticle effect on the fluid rheology. They introduced coupled stresses to the Reynolds equation to account for the impact of nanoparticles.…”

Section: Nanoparticles For Enhanced Lubricationmentioning

confidence: 99%

Mathematical Modeling and Computer Simulations of Nanofluid Flow with Applications to Cooling and Lubrication

Kleinstreuer

2016

Fluids

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There is a growing range of applications of nanoparticle-suspension flows with or without heat transfer. Examples include enhanced cooling of microsystems with low volume-fractions of nanoparticles in liquids, improved tribological performance with lubricants seeded with nanoparticles, optimal nanodrug delivery in the pulmonary as well as the vascular systems to combat cancer, and spray-coating using plasma-jets with seeded nanoparticles. In order to implement theories that explain experimental evidence of nanoparticle-fluid dynamics and predict numerically optimum system performance, a description of the basic math modeling and computer simulation aspects is necessary. Thus, in this review article, the focus is on the fundamental understanding of the physics of nanofluid flow and heat transfer with summaries of microchannel-flow applications related to cooling and lubrication.

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Static characteristics of a fluid film bearing with TiO2 based nanolubricant using the modified Krieger–Dougherty viscosity model and couple stress model

Cited by 41 publications

References 30 publications

A Time Fractional Model With Non-Singular Kernel the Generalized Couette Flow of Couple Stress Nanofluid

A Time Fractional Model With Non-Singular Kernel the Generalized Couette Flow of Couple Stress Nanofluid

Effect of couple stress parameter on steady-state and dynamic characteristics of three-lobe journal bearing operating on TiO₂ nanolubricant

Mathematical Modeling and Computer Simulations of Nanofluid Flow with Applications to Cooling and Lubrication

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Static characteristics of a fluid film bearing with TiO2 based nanolubricant using the modified Krieger–Dougherty viscosity model and couple stress model

Cited by 41 publications

References 30 publications

A Time Fractional Model With Non-Singular Kernel the Generalized Couette Flow of Couple Stress Nanofluid

A Time Fractional Model With Non-Singular Kernel the Generalized Couette Flow of Couple Stress Nanofluid

Effect of couple stress parameter on steady-state and dynamic characteristics of three-lobe journal bearing operating on TiO2 nanolubricant

Mathematical Modeling and Computer Simulations of Nanofluid Flow with Applications to Cooling and Lubrication

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Effect of couple stress parameter on steady-state and dynamic characteristics of three-lobe journal bearing operating on TiO₂ nanolubricant