Abstract
This paper presents the performance characteristics of transient isothermal elastohydrodynamic lubrication of roller bearing in line contact with Newtonian and non-Newtonian. The time dependent modified Reynolds equation and elastic equation were formulated for compressible fluid. Newton-Raphson method and multigrid method were implemented to obtain the film pressure profiles, film thickness profiles and traction coefficient in the contact region at various loads and speeds. The simulation results show the minimum film thickness at outer ring of roller bearing is slightly lower than the film thickness of inner ring. The non-Newtonian fluids have thinner film thickness than Newtonian fluids. For an increase in the carrying load on roller bearing, there is a reduction in the film thickness but film pressure and traction coefficient were increased. The increasing shaft speed was increased the film thickness and traction coefficient and the maximum pressure is moved to the center of contact region.
Keywords : Transient Elastohydrodynamic Lubrication, Line Contact, Multigrid, Modified Reynolds Equation, Non-Newtonian fluid.
This paper presents the performance characteristics of transient isothermal elastohydrodynamic lubrication of roller bearing in line contact with Newtonian and non-Newtonian. The time dependent modified Reynolds equation and elastic equation were formulated for compressible fluid. Newton-Raphson method and multigrid method were implemented to obtain the film pressure profiles, film thickness profiles and traction coefficient in the contact region at various loads and speeds. The simulation results show the minimum film thickness at outer ring of roller bearing is slightly lower than the film thickness of inner ring. The non-Newtonian fluids have thinner film thickness than Newtonian fluids. For an increase in the carrying load on roller bearing, there is a reduction in the film thickness but film pressure and traction coefficient were increased. The increasing shaft speed was increased the film thickness and traction coefficient and the maximum pressure is moved to the center of contact region.
Keywords : Transient Elastohydrodynamic Lubrication, Line Contact, Multigrid, Modified Reynolds Equation, Non-Newtonian fluid.
