The magnetohydrodynamic effects on a fluid film squeezed between two rotating surfaces

Hamza, E. A.

doi:10.1088/0022-3727/24/4/005

Cited by 55 publications

(32 citation statements)

References 18 publications

(2 reference statements)

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“…@p @y D 0 [3] @u @x C @v @z C @w @y D 0; [4] where p is the film pressure; u,v, and w are the velocity components in the x,z, and ydirections, respectively; m is the lubricant viscosity; h is material constant responsible for couple stresses; and s is the conductivity of the lubricant. The third term in Eq.…”

Section: Mathematical Formulationmentioning

confidence: 99%

Modified Reynolds Equation for Different Types of Finite Plates with the Combined Effect of MHD and Couple Stresses

Fathima

Naduvinamani

Hanumagowda³

et al. 2015

Tribology Transactions

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We make an effort to analyze the behavior of squeeze film characteristics of different finite plates with couple stress fluid in the presence of a transverse magnetic field. On the basis of the Stokes couple stress fluid model and hydromagnetic flow model, a modified Reynold's equation is derived, which is solved by using appropriate boundary conditions to obtain squeeze film pressure, load-carrying capacity, and squeeze film time. The graphical representation of the results suggests that the different bearing systems register an enhanced performance with couple stresses compared to that of a bearing system working with a conventional lubricant in the presence of a transverse magnetic field. It is observed that the effect of applied magnetic field on the squeeze film lubrication between different finite plates with conducting couple stress fluids is to increase the load-carrying capacity significantly and to delay the time of approach compared to the corresponding nonconducting Newtonian case. It is seen that for all of the finite plates of different shapes, the circular shape gives the maximum load and time.

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Section: Mathematical Formulationmentioning

confidence: 99%

Modified Reynolds Equation for Different Types of Finite Plates with the Combined Effect of MHD and Couple Stresses

Fathima

Naduvinamani

Hanumagowda³

et al. 2015

Tribology Transactions

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“…Hamza and MacDonald [10] made use of finite difference scheme to discuss the 2D squeezing flow between two parallel surfaces. Later on, Hamza [11] also considered the presence of magnetic field and investigated the squeezed flow between two rotating disks using similarity variables. Singh et al [9] discussed the squeezed flow of viscous fluid in a channel with perpendicularly moving walls.…”

Section: Introductionmentioning

confidence: 99%

Analysis of entropy generation effects in unsteady squeezing flow in a rotating channel with lower stretching permeable wall

Butt

Ali

2015

Journal of the Taiwan Institute of Chemical Engineers

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“…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. Bujurke and Kudenatti [8] have theoretically explored the effect of rough on electrically conducting fluid between two rectangular plates, in which an upper plate has a roughness structure.…”

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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The magnetohydrodynamic effects on a fluid film squeezed between two rotating surfaces

Cited by 55 publications

References 18 publications

Modified Reynolds Equation for Different Types of Finite Plates with the Combined Effect of MHD and Couple Stresses

Modified Reynolds Equation for Different Types of Finite Plates with the Combined Effect of MHD and Couple Stresses

Analysis of entropy generation effects in unsteady squeezing flow in a rotating channel with lower stretching permeable wall

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

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