On the steady-state performance analysis of finite hydrodynamic porous journal bearing lubricated with coupled stress fluid

This paper deals with the theoretical analysis of the steady-state performance characteristics of finite hydrodynamic porous journal bearing lubricated with the coupled stress fluids, blended with various additives. In the analysis, the tangential velocity slip at the bearing-film interface has been considered based on the Beavers-Joseph criterion. The investigation includes the governing equation for the fluid flow through the porous medium as per Darcy’s law. The governing equation is obtained in the generalized form of a modified Reynolds equation which considers the couple stress effect. The governing equations have been normalized and discretized by finite difference technique and solved numerically by the Gauss-Seidel iterative method, with appropriate boundary condition to obtain the film pressure distribution and the porous bush layer wise pressure distribution. From the film pressure distribution, the steady state performance characteristics in terms of load carrying capacity, leakage flow rate and frictional parameters have been obtained for various design parameters. From the analysis it has been observed that the load carrying capacity, frictional parameter increases and attitude angle, end flow rate decreases.