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In this paper, we developed the wavelet based decoupled method for the numerical solution of elastohydrodynamic lubrication problems. The standard decoupled method with Newton-generalized minimum residual procedure performs poorly or may break down when it is used to solve such type of problems. Zargari et al. (2007) presented decoupled and coupled methods, in which for the limitations of decoupled method for some set of physical parameters and slight variation in these values the non-convergence solution was tabulated. The wavelet based decoupled technique is used to overcome these limitations. Residual errors are presented in comparison with the existing methods to demonstrate the versatility and applicability of the proposed method. And also investigations of the effects of couple stress fluids on elastohydrodynamic lubrication behavior in smooth and rough contacts at low-speed-high load and high-speed-low load conditions are discussed. The elastohydrodynamic lubrication characteristics computed for couple stress fluids are found to have strong dependence on couple stress parameter

Wavelet based decoupled method for the investigation of surface roughness effects in elastohydrodynamic lubrication problems using couple stress fluid