Hydromagnetic Theory for Squeeze Films

Shukla, J.B.

doi:10.1115/1.3650490

Cited by 35 publications

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“…Assumption of Newtonian lubricant behaviour is, in general, idealised. [28] and Shukla [29]. This case represents active suspension elements for vehicles under relatively larger displacement.…”

Section: -Results and Discussionmentioning

confidence: 99%

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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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Section: -Results and Discussionmentioning

confidence: 99%

“…In equation (5) According to Shukla [29] for hydromagnetic lubrication one can use equations (33)-(40) as follows:…”

Section: Appendixmentioning

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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“…Many investigators have applied the electrically conducting fluids with the presence of external magnetic fields across the lubricant film to study various kinds of hydromagnetic squeeze film mechanisms, for example, the circular plates by Shukla [3], the annular discs by Lin [4], the rectangular plates by Bujurke and Kudenatti [5], the sphere-plate mechanism by Chou et al [6] and the conical plates by Vadher et al [7].…”

Section: Introductionmentioning

confidence: 99%

“…In the analyses of circular plates [1][2][3], the effects of fluid inertia forces have been neglected as compared to the viscous forces. However, the influences of fluid inertia forces may become important when the motion speed of machine elements increases.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Squeeze Film Behavior Between Hydromagnetic Parallel Circular Disks

Lin¹,

Hu²

2016

Advances in Computer Science Research

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“…The MHD lubrication in an externally pressurized thrust bearing has been investigated both theoretically and experimentally by Maki et al [1]. Limited studies of MHD lubrication are available in the literature which includes MHD slider bearings [2,3], MHD journal bearings [4,5], and MHD squeeze film bearings [6]. Hamza [7] has shown the effects of MHD on a fluid film squeezed between two rotating surfaces.…”

Section: Introductionmentioning

confidence: 99%

Numerical Solution of the MHD Reynolds Equation for Squeeze-Film Lubrication between Porous and Rough Rectangular Plates

2013

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The present theoretical study investigates the effects of surface roughness and couple-stress fluid between two rectangular plates, of which an upper rough plate has a roughness structure and the lower plate has a porous material in the presence of transverse magnetic field. The lubricant in the gap is taken to be a viscous, incompressible, and electrically conducting couple-stress fluid. This gap is separated by a film thickness H which is made up of nominal smooth part and rough part. The modified Reynolds equation in the film region is derived for one-dimensional longitudinal roughness structure and solved numerically using multigrid method. The numerical results for various physical parameters are discussed in terms of pressure distribution, load capacity, and squeeze film time of the bearing surfaces. Our results show that, the pressure distribution, load capacity and squeeze film time are predominant for larger values of Hartman number and roughness parameter, and for smaller values of couple-stress parameters when compared to their corresponding classical cases.

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Hydromagnetic Theory for Squeeze Films

Cited by 35 publications

References 0 publications

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

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

Nonlinear Squeeze Film Behavior Between Hydromagnetic Parallel Circular Disks

Numerical Solution of the MHD Reynolds Equation for Squeeze-Film Lubrication between Porous and Rough Rectangular Plates

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