Hematite Suspension based Absorbent Pad Inclined Slider Influenced by Slip and Squeeze Velocity with Altering Film Ratio

The rationale of the current article is to investigate hematite suspension based slider bearings of various configurations namely, inclined, secant, exponential, convex and parallel pad stators under the effect of polarization force. The comparative investigation of the load capacity with reference to the position of centre of pressure under varying squeeze and slip conditions has been carried out. The squeeze velocity seems when the upper pad moves normally towards the lower one. The mathematical articulations for non‐dimensional pressure, load capacity and position of the centre of pressure for various configurations of bearing have been acquired. The optimum values of film ratio concerning maximum load capacity for various designed sliders are analyzed at distinct values of squeeze velocity. The interrelation between parallel, inclined and convex pad stator slider bearings is also explored. Finally, a suggestive approach is made to use a particular design of slider under given dynamic conditions.

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“…1 τ being the slip factor. The Reynolds dynamic equation acquired by Ram and Kumar 40 using Equation ( 12) and boundary conditions (13) is…”

Section: Mathematical Treatment Of the Problemmentioning

confidence: 99%

Comparative analysis and interrelation between haematite suspension based sliders of various configurations influenced with squeeze effects and film ratio under slip conditions

Ram

Kumar

Devender

2022

Lubrication Science

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“…Hematite nanosuspensions (Ram and Kumar 2021) in base fluids, better known as ferrofluids (FFs), do not occur in the free state in nature and are a special type of synthetic fluids that undergo significant variation in flow behaviour due to an applied magnetic field. FFs were first synthesized by NASA in 1964, for their use in space to maintain the temperature of the space shuttle.…”

Section: Introductionmentioning

confidence: 99%

Squeeze film derivation of the porous curved annular plates with variable magnetic field, Rosensweig’s viscosity and slip velocity in the Shliomis model

Devender,

Ram,

Sharma

2024

MMMS

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PurposeThe present article aims to investigate the squeeze effects on hematite suspension-based curved annular plates with Rosensweig’s viscosity and Kozeny–Carman’s porous structure under the variable strong magnetic field and slip in the Shliomis model. The variable magnetic field is utilised to retain all magnetic elements within the model. The aforementioned mechanism would have the benefit of generating a maximal field at the system’s required active contact zone.Design/methodology/approachThe Kozeny–Carman globular sphere model is used for porous facing. Rosensweig’s extension of Einstein’s viscosity is taken into consideration to enhance the fluid’s viscosity, and Beavers and Joseph’s slip boundary conditions are employed to assess the slip effect.FindingsThe pressure and lifting force under squeezing are computed through modification of the Reynolds equation with the addition of Kozeny–Carman’s model-based porosity, Rosensweig’s viscosity, slip and varying magnetic field. The obtained results for the lifting force are very encouraging and have been compared with Einstein’s viscosity-based model.Originality/valueResearchers so far have carried out problems on lubrication of various sliders considering Einstein’s viscosity only, whereas in our problem, Rosensweig’s viscosity has been taken along with Kozeny–Carman’s porous structure model.

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“…Most of these studies have demonstrated the strong influence of thermal effects in bearings and have presented many advantages of the use of ferro-nanofluids. 25–27 Ram and Kumar 28 have examined the hematite ferro-nanoparticle suspension-based porous-inclined slider bearing. They have analysed the impact of the squeeze velocity, slip parameter and material constant on the load-carrying capacity, position of pressure, friction, etc.…”

Section: Introductionmentioning

confidence: 99%

Ferro-nanofluid squeeze film lubrication with heat transfer

Kavarthalai

Vimala

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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A theoretical study of a squeezing ferro-nanofluid flow including thermal effects is carried out with application to bearings and articular cartilages. A representational geometry of the thin layer of a ferro-nanofluid squeezed between a flat rigid disk and a thin porous bed is considered. The flow behaviours and heat transfer in the fluid and porous regions are investigated. The mathematical problem is formulated based on the Neuringer–Rosensweig model for ferro-nanofluids in the fluid region including an external magnetic field, Darcy law for the porous region and Beavers–Joseph slip condition at the fluid–porous interface. The expressions for velocity, fluid film thickness, contact time, fluid flux, streamlines, pathlines, mean temperature and heat transfer rate in the fluid and porous regions are obtained by using a perturbation method. An asymptotic solution for the fluid layer thickness is also presented. The problem is also solved by a numerical method and the results by asymptotic analysis, perturbation and numerical methods are obtained assuming a constant force squeezing state and are compared. It is shown that the results obtained by all the methods agree well with each other. The effects of various parameters such as Darcy number, Beavers–Joseph constant and magnetization parameter on the flow behaviours, contact time, mean temperature and heat transfer rate are investigated. The novel results showing the impact of using ferro-nanofluids in the two applications under consideration are presented. The results under special cases are further compared with the existing results in the literature and are found to agree well.

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Hematite Suspension based Absorbent Pad Inclined Slider Influenced by Slip and Squeeze Velocity with Altering Film Ratio

Cited by 6 publications

References 26 publications

Comparative analysis and interrelation between haematite suspension based sliders of various configurations influenced with squeeze effects and film ratio under slip conditions

Comparative analysis and interrelation between haematite suspension based sliders of various configurations influenced with squeeze effects and film ratio under slip conditions

Squeeze film derivation of the porous curved annular plates with variable magnetic field, Rosensweig’s viscosity and slip velocity in the Shliomis model

Ferro-nanofluid squeeze film lubrication with heat transfer

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