Abstract
This paper presents a thermohydrodynamic solution for a finite width hydrodynamic journal bearing with non-Newtonian lubricants, obeying the power-law model. In this treatment the oil film viscosity is taken to be an exponential function of temperature. The modified Reynolds equation is solved numerically by using a control volume method (Elrod algorithm). A perturbation method is then adopted to deal with the equations of motion and the integro-differential energy equation and the analysis becomes easier by replacing the conduction terms in terms of the convective boundary conditions at two solid surfaces. As a result, for shear-thickening fluids ( n>1), the load-carrying capacity, temperature and pressure distribution are increased, while for pseudoplastic fluids ( n<1) they are all decreased. In addition, thermal effects are found to be more pronounced at higher values of flow behaviour index n, eccentricity and slenderness ratios.
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