Offset Journal Bearing Lubricated with
Couple Stress Fluids and its Static

Author - 

Bikas Prasad


The aim of this paper is to study the effect of couple stress fluid on the static performance of an offset journal bearing. To find the pressure profile the Reynolds equation in non-dimensional form is solved using finite difference method. The static characteristics i.e. load carrying capacity, attitude angle and Sommerfeld number are determined and compared with Newtonian fluid. It was found that with the increase in couple stress parameter the load carrying capacity and attitude angle are enhanced and sommerfeld number is decreased. Effect of couple stress parameter on pressure profile is also carried out which shows that maximum increases with couple stress parameter.


offset journal bearing, Reynolds, Sommerfeld number, Couple stress fluid.


  • Tayal S P, Sinhasan R and Singh D V, 1981, “Finite Element Analysis of Elliptical Bearings Lubricated by a NonNewtonian Fluid”, Wear, 80, 71 – 81. 

  • Chasalevris A, 2015 “Analytical Evaluation of the Static and Dynamic Characteristics of Three-Lobe Journal Bearings with Finite Length”, ASME Journal of Tribology. 

  • Lin J R, 1997, “Static Characteristics of Rotor Bearing System Lubricated with Couple Stress Fluids”, computers & structure Vol. 62. No. I, pp. 175-184. 

  • Crosby W A, and Chetti B, 2009, “Journal Bearing Lubricated with Couple-Stress Fluid”, Tribology Transactions, Vol.52, pp. 262-268. 

  • Chetti B, 2011, “Static and Dynamic Analysis of Hydrodynamic Four-lobe Journal Bearing with Couple Stress Lubricants”, Jordan Journal of Mechanical and Industrial Engineering, Vol.5, No.1, pp.23 – 28.