Theoretical study of Shliomis model based magnetic squeeze film in rough curved annular plates with assorted porous structures

Jimit Patel,Gunamani Deheri

doi:10.5937/fmet1401056p

Abstract

In present theoretical investigation, the effect of Shliomis model based ferrofluid lubrication on the squeeze film between curved rough annular plates with comparison between two different porous structures is discussed. Kozeny-Carman's formulation and Irmay's model are adopted for porous structures. The stochastic models of Christensen and Tonder have been used for characterizing transverse roughness. The associated Reynolds type equation is solved to obtain the pressure distribution leading to the calculation of the load carrying capacity. The graphical representations show that the adverse effect of transverse roughness can be minimized by the positive effect of magnetization in the case of negatively skewed roughness, suitably choosing curvature parameters. Further, this compensation appears to be more in the case of Irmay's model as compared to that of Kozeny- Carman's method, which makes the Irmay's model more suitable for adoption. It is observed that the effect of morphology parameter and volume concentration parameter increases the load carrying capacity of the bearing system.

Highlights

In the field of engineering and technology, annular bearing are often designed to bear the transverse loads
Porous structures are very important in biomedical applications where there are strict limits on the amount of residual organic solvent that may remain in the materials; this provides a strong driving force to seek non- toxic solvent alternatives
It was found that the adverse effect of transverse roughness could be overcome by the positive effect of ferrofluid lubrication in the case of negatively skewed roughness when Kozeny- Carman’s model is deployed by suitably choosing curvature parameters and rotational inertia

Summary

Introduction

In the field of engineering and technology, annular bearing are often designed to bear the transverse loads. One FME Transactions (2014) 42, 56-66 needs to remember that surface modification or templating of nano porous material presents some special problem because organic solvents are often too viscous to fill such small pores. In view of their wide range of applications, theoretical studies have been conducted by [10,11]. [12] discussed the effect of various porous structures on the performance of a Shliomis model based ferrofluid lubrication of a squeeze film in rotating rough porous curved circular plates. It was found that the adverse effect of transverse roughness could be overcome by the positive effect of ferrofluid lubrication in the case of negatively skewed roughness when Kozeny- Carman’s model is deployed by suitably choosing curvature parameters and rotational inertia

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Results

Conclusion