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Elastohydrodynamic Lubrication of Rough Surface in Soft Material

Khanittha Wongseedakaew



This paper presents elastohydrodynamic lubrication (EHL) of rough surface in soft material with non- Newtonian fluids base on Power law model. The time independent modified Reynolds equation and elasticity equation were solved numerically using finite different method, Newton-Raphson method and multigrid multilevel method to obtain the film pressure profiles, film thickness profiles and traction coefficient in the contact region. The simulation results show that surface roughness has effect on film thickness. The minimum film thickness decreases but film pressure and friction coefficient increase when applied load increases. For increasing roller surface speed, the minimum film thickness and friction coefficient increase but the maximum film pressure decreases.


Elastohydrodynamic Lubrication, Soft Material, Rough Surface, Multigrid Multilevel Method.

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