Hydrodynamic lubrication of rough slider bearings with couple stress fluids

2003 ◽  
Vol 36 (12) ◽  
pp. 949-959 ◽  
Author(s):  
N.B. Naduvinamani ◽  
Syeda Tasneem Fathima ◽  
P.S. Hiremath
Keyword(s):  
Couple Stress ◽  
Hydrodynamic Lubrication ◽  
Slider Bearings ◽  
Couple Stress Fluids

scholarly journals Magnetohydrodynamic effects on finite and infinite slider bearings

2019 ◽  
Vol 286 ◽  
pp. 07002
Author(s):  
M. Mouda ◽  
M. Nabhani ◽  
M. El Khlifi
Keyword(s):  
Magnetic Field ◽  
Finite Difference ◽  
Couple Stress ◽  
Type Equation ◽  
Transverse Magnetic ◽  
Two Dimensional ◽  
Stress Effects ◽  
Slider Bearings ◽  
Seidel Method ◽  
Couple Stress Fluids

This paper presents a numerical investigation of lubricating slider bearings with conducting couple stress fluids using externally applied magnetics fields. The modified two-dimensional magnetohydrodynamic couple stress Reynolds-type equation is obtained. This governing equation is resolved numerically by using finite difference scheme, which involves the Gauss–Seidel method to compute the bearing characteristics. Numerical results using different considered values of the couple stress and Hartman number are presented. These results demonstrate that the transverse magnetic field and couple stress effects are significant.

A Study of Load Capacity of Finite Slider Bearings with Slip Surfaces and Stokesian Couple Stress Fluids

2010 ◽  
Vol 1 ◽  
pp. 57-66 ◽  
Author(s):  
M.H. Oladeinde ◽  
John A. Akpobi
Keyword(s):  
Mathematical Model ◽  
Couple Stress ◽  
Hydrodynamic Lubrication ◽  
Load Capacity ◽  
Velocity Slip ◽  
Weak Form ◽  
Slider Bearing ◽  
Slider Bearings ◽  
Stiffness Matrices ◽  
Bearing Load

A mathematical model for the hydrodynamic lubrication of finite slider bearings with velocity slip and couple stress lubricants is presented. A numerical solution for the mathematical model using finite element scheme is obtained using four node linearly interpolated quadrilateral elements. Stiffness integrals obtained from the weak form of the governing equations were solved using Gauss Quadrature to obtain a finite number of stiffness matrices. The global system of equations was obtained for the bearing and solved using Gauss Seidel iterative scheme. The converged pressure solution was used to obtain the load capacity of the bearing. Numerical experiments reveal the existence of an optimum velocity slip for which maximum benefit is obtained for the slider bearing in terms of bearing load. Increase in the slip parameter beyond this optimum value was shown not to augment the bearing load. Computations put forth also affirm that the bearing load is augmented with increase in couple stress parameter. An optimal film thickness ratio was also obtained for which load capacity is maximized with or without the application of slip to the bearing surfaces.

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