Analysis of Hydrodynamic Journal Bearings Having Non-Newtonian Lubricants Using the Finite Element Method

Tayal, S.P.; Sinhasan, R.; Singh, Devendra

doi:10.1080/05698198208983109

Cited by 16 publications

(9 citation statements)

References 9 publications

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“…To compute the non-dimensional value of F¯X and F¯Z, integrated the p¯ along X and Z directions as 26,29 …”

Section: Mathematical Formulationmentioning

confidence: 99%

“…Using the above-mentioned assumptions, the Navier-Stokes motion equation is expressed as 1,25,26 r 2Ṽ À rp þJ ÂB ¼ 0 ð1Þ…”

Section: Mhd Equationmentioning

confidence: 99%

“…Using the above-mentioned assumptions, the Navier–Stokes, equation of motion and continuity equation, equations (1) and (1a) are expressed as 1,25,26 where the term, J→×B→=F→l , is the Lorentz force, N…”

mentioning

confidence: 99%

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Influence of bearing surface irregularities on hybrid slot-entry journal bearing with electrically conducting lubricant

Sahu

Sharma

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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This study concerns with the numerical simulation of a hybrid slot entry journal bearing lubricated with electrically conducting lubricant under the influence of magnetic field for both thermal and isothermal conditions. The Navier–Stokes equation has been used to formulate the flow of electrically conducting lubricant through slot restrictor and combining the Lorentz force in the equations of motion, together with the Ohm’s law and Maxwell equations. Further, the effect of surface irregularities on bearing surface is considered to analyse the performance of the slot-entry bearing. The surface irregularities asperity profile has been modelled in both axial as well as circumferential directions. Finite element method is used to solve the Modified MHD Reynolds equation. To compute the bearing performance characteristic parameters, a MATLAB source code based on Gauss–Seidel iteration method has been developed. A comparative numerical analysis has been carried out for an electrically conducting lubricant, Newtonian lubricant, bearing surface having irregularities and bearing with smooth surface. The numerically simulated results indicate that considering the bearing surface irregularities and MHD effects enhances the value of fluid film damping coefficients [Formula: see text] and the value of minimum fluid film thickness [Formula: see text].

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“…To compute the non-dimensional value of F¯X and F¯Z, integrated the p¯ along X and Z directions as 26,29 …”

Section: Mathematical Formulationmentioning

confidence: 99%

“…Using the above-mentioned assumptions, the Navier-Stokes motion equation is expressed as 1,25,26 r 2Ṽ À rp þJ ÂB ¼ 0 ð1Þ…”

Section: Mhd Equationmentioning

confidence: 99%

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Influence of bearing surface irregularities on hybrid slot-entry journal bearing with electrically conducting lubricant

Sahu

Sharma

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Both half Sommerfeld and Reynolds boundary conditions were used in the theoretical prediction and it was found that experimental data correlated the most with half Sommerfeld condition. Tayal et al 9 studied the static performance characteristics of infinitely long bearing by using cubic shear stress law for non-Newtonian lubricant.…”

Section: Introductionmentioning

confidence: 99%

Analysis and comparison of steady-state performance characteristics of two-axial groove and multilobe hydrodynamic bearings lubricated with non-Newtonian fluids

Das

Roy

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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Rotating machines are one of the most important and widely used machineries in the modern engineering world. They are also the required to run at high rotating speed. The plain journal bearing is mostly replaced by some other bearing, as it does not suit the stability requirement of high-speed machines and precision machine tools. In order to improve the stability of a circular bearing, many researchers tried to change its geometrical configuration. In view of this, an attempt has been made in the present work to study the performance characteristics of four different bearing configurations using non-Newtonian lubricant and comparison of the results has been made with plain journal bearing. To calculate the steady-state performance characteristics, nondimensional form of the Reynolds equation using non-Newtonian lubricant has been written and solved for the steady-state nondimensional pressure distribution in a finite grid using finite difference method with successive over-relaxation technique satisfying appropriate boundary condition. From the study, it can be concluded that three-lobe bearing have maximum load-carrying capacity and minimum friction variable, whereas two-lobe bearing have maximum flow coefficient.

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“…Rajalingham et al (11) have used the Reiner-Philippoff model to obtain a modified form of Reynolds equation and have studied the static performance characteristics for finite width bearings. Tayal et al (12) have solved the Navier-Stokes equations by a finite element method using a cubic shear stress law for the non-Newtonian lubricants to study the static performance characteristics for an infinitely long bearing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Hydrodynamic Journal Bearings Having Non-Newtonian Lubricants (Prandtl Model) by a Finite Element Method

Tayal

Sinhasan

Singh

1981

Journal of Mechanical Engineering Science

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Additives are used to improve the performance of commercial lubricants. These lubricants behave like non-Newtonian fluids (shear thinning or shear thickening). The effect of the nonlinear behaviour on the performance characteristics of finite width journal bearings is investigated using the Prandtl model. The finite element method, using Galerkin's technique, has been used to solve the Navier-Stokes equations in cylindrical coordinates, representing the flow-field in the clearance space of a bearing using Newtonian fluids, and the non-Newtonian effect is introduced by modifying the viscosity term for the model in each iteration. Theresultsapplicable to shearthinning (pseudoplastic) and shear-thickening (dilatant) lubricants are compared with the established results for Newtonian lubricants.'

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Analysis of Hydrodynamic Journal Bearings Having Non-Newtonian Lubricants Using the Finite Element Method

Cited by 16 publications

References 9 publications

Influence of bearing surface irregularities on hybrid slot-entry journal bearing with electrically conducting lubricant

Influence of bearing surface irregularities on hybrid slot-entry journal bearing with electrically conducting lubricant

Analysis and comparison of steady-state performance characteristics of two-axial groove and multilobe hydrodynamic bearings lubricated with non-Newtonian fluids

Analysis of Hydrodynamic Journal Bearings Having Non-Newtonian Lubricants (Prandtl Model) by a Finite Element Method

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