Analysis of magneto‐hydrodynamic squeeze film characteristics between curved annular plates

Lin, Jaw‐Ren; Lu, Rong-Fang; Liao, Won-Hsion

doi:10.1108/00368790410550714

Cited by 30 publications

(22 citation statements)

References 14 publications

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“…Figures 9-10 show the variation of dimensionless film thickness h* with dimensionless response time t* for different values of the inverse coupled stress parameter a under both non-inertial and non-conducting (Re = 0 , M=0) ) and non-inertial conducting (Re=0 , M = 4 ) conditions. It is shown that for a non-Newtonian fluid the response time is longer than for a Newtonian one, although the ultimate load carrying capacity is conversely true (see figures [6][7][8]. The physical implication of these results is that for certain impulsive loading conditions (depending on the maximum applied load) the Newtonian fluids may actually perform better.…”

Section: -Results and Discussionmentioning

confidence: 67%

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Squeeze film lubrication of coupled stress electrically conducting inertial fluids in wide parallel rectangular conjunctions subjected to a magnetic field

Daliri

Jalali-Vahid

Rahnejat

2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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The paper presents analytical solution of squeeze film characteristics in wide parallel rectangular conjunctions with incompressible electrically conducting couple stress fluids subjected to a magnetic field. Analytical expressions are obtained by combined solution of modified Reynolds equation and Stokes micro-continuum for couple stress fluids with averaged inertia. Various cases of magneto-hydrodynamic, conducting and non-conducting fluid characteristics with and without convective inertial contributions are investigated. It is shown that, in general, couple stress fluids enhance the load carrying capacity of the contact and inhibit the incidence of thin films which can result in direct contact of surfaces. Convective inertia also significantly improves the load carrying capacity. However, with impulsive loading the response time of couple stress fluids deteriorates relative to Newtonian lubricants on account of their increased viscosity. An important conclusion of the study is that magneto-hydrodynamic couple stress fluids are best suited to applications with high relatively steady load applications.

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Section: -Results and Discussionmentioning

confidence: 67%

“…Some representative experimental and numerical studies include the study of MHD squeeze film characteristics by Maki and Kuzma [5], Usha and Vimala [6], Lin et al [7] and Lin [8]. Additionally, Agrawal [9], Anwar and Rodkiewich [10], and Gupta and Bhat [11] have studied the lubricant behaviour in MHD slider bearings.…”

Section: Introductionmentioning

confidence: 99%

Squeeze film lubrication of coupled stress electrically conducting inertial fluids in wide parallel rectangular conjunctions subjected to a magnetic field

Daliri

Jalali-Vahid

Rahnejat

2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…A close scrutiny of the results available in this paper indicates that the effect of small values of the curvature parameters is more sharp as compared to that of Lin et al [16] in spite of the fact that the roughness and deformation bring down the load-carrying capacity. In order to enhance the validation of the conclusions of this paper the following sets of comparison have been made with other well known published works.…”

Section: Validationmentioning

confidence: 77%

“…Tripathi et al [15] extended the analysis of Bhat and Deheri [12] by incorporating rotation of both the plates. Lin et al [16] considered the performance of squeeze film between curved circular plates with an electrically conducting fluid in the presence of a transverse magnetic field. These studies underline the importance of the pressure effect of magnetic fluids and the magnetizing effect of lubricants in the lubricating process, in turn, rendering the action of both magnetic field and magnetic fluid in lubrication manifestly clear.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Fluid-Based Squeeze Film Behaviour in Curved Porous-Rotating Rough Annular Plates and Elastic Deformation Effect

Shimpi

Deheri

2012

Advances in Tribology

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Efforts have been directed to study and analyze the squeeze film performance between rotating transversely rough curved porous annular plates in the presence of a magnetic fluid lubricant considering the effect of elastic deformation. A stochastic random variable with nonzero mean, variance, and skewness characterizes the random roughness of the bearing surfaces. With the aid of suitable boundary conditions, the associated stochastically averaged Reynolds' equation is solved to obtain the pressure distribution in turn, which results in the calculation of the load-carrying capacity. The graphical representations establish that the transverse roughness, in general, adversely affects the performance characteristics. However, the magnetization registers a relatively improved performance. It is found that the deformation causes reduced load-carrying capacity which gets further decreased by the porosity. This investigation tends to indicate that the adverse effect of porosity, standard deviation and deformation can be compensated to certain extent by the positive effect of the magnetic fluid lubricant in the case of negatively skewed roughness by choosing the rotational inertia and the aspect ratio, especially for suitable ratio of curvature parameters.

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“…Some representative experimental and numerical studies include the MHD squeeze film characteristics by Maki and Kuzma [5], Usha and Vimala [6], Lin et al [7], Lin [8] and Hsu et al [9]. Additionally, Agrawal [10], Anwar and Rodkiewich [11], and Gupta and Bhat [12] have studied the lubricant behaviour in MHD slider bearings.…”

Section: Introductionmentioning

confidence: 99%

Magneto-hydrodynamics of couple stress lubricants in combined squeeze and shear in parallel annular disc viscous coupling systems

Daliri

Jalali-Vahid

Rahnejat

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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This paper presents predictive analysis of load carrying capacity, tractive efficiency and response time of parallel annular discs intervened with a film of lubricant under combined shear and squeeze film motions. This configuration represents operational characteristics of viscous coupling systems. In particular, the case of viscous dampers for tractive torque generation and distribution in all-wheel-drive off-road vehicles is studied. Various forms of lubricant behaviour, from idealised Newtonian to that of non-Newtonian silicone-based fluids and incompressible isothermal electrically conducting couple stress fluids, subjected to a magnetic field are studied (MHD). The solution for the MHD includes combined solution of modified Reynolds equation and Stoke's micro-continuum for couple stress fluids in squeeze and shear with rotational fluid inertia, an approach not hitherto reported in literature.It is shown that in general MHD couple stress fluids enhance the load carrying capacity of the contact and inhibit the incidence of thin films which can result in direct contact of surfaces. Rotational inertia decreases the load carrying capacity, although in general the MHD fluids show better load carrying capacity and tractive efficiency than the other alternatives. However, they exhibit a lower response time under the assumed isothermal condition. Nevertheless, the MHD fluids are best suited to applications in viscous coupling systems because of their controllability.

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Analysis of magneto‐hydrodynamic squeeze film characteristics between curved annular plates

Cited by 30 publications

References 14 publications

Squeeze film lubrication of coupled stress electrically conducting inertial fluids in wide parallel rectangular conjunctions subjected to a magnetic field

Squeeze film lubrication of coupled stress electrically conducting inertial fluids in wide parallel rectangular conjunctions subjected to a magnetic field

Magnetic Fluid-Based Squeeze Film Behaviour in Curved Porous-Rotating Rough Annular Plates and Elastic Deformation Effect

Magneto-hydrodynamics of couple stress lubricants in combined squeeze and shear in parallel annular disc viscous coupling systems

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