A THEORY OF HYDRODYNAMIC LUBRICATION INVOLVING THE MIXTURE OF 2 FLUIDS

Based on the principles of continuum mechanics, we drive the governing equations for the hydrodynamic lubrication involving the mixture of T wo incompressible fluids. The governing equations are general in the s ense that they can be applied to the mixture of any simple non-Newtoni an fluid with a Newtonian fluid. A mixture thus formed is considered t o be nonhomogeneous and non-Newtonian. In the theoretical development, the interaction between the constituents is taken into consideration. It is shown that a number of currently available models are special c ases of the theory presented in this paper. As an example, results are presented for journal bearing performance lubricated with a mixture o f a power-law fluid mixed with Newtonian oil.