Results of a numerical study of the influence of micro-patterned surfaces in hydrodynamic lubrication of two parallel walls are reported. Two types of parameterized grooves with the same order of depth as the film thickness are used on one stationary wall. The other wall is smooth and is sliding with a specified tangential velocity. Isothermal incompressible two dimensional full film fluid flow mechanics is solved using a Computational Fluid Dynamics method. It is shown that, by introducing a micro-pattern on one of two parallel walls, a net pressure rise in the fluid domain is achieved. This produces a load carrying capacity on the walls which is mainly contributed by fluid inertia. The load carrying capacity increases with Reynolds number. The load carrying capacity is reported to increase with groove width and depth. However, at a certain depth a vortex appears in the groove and near this value the maximum load carrying capacity is achieved. It is shown that the friction force decreases with deeper and wider grooves. Among all geometries studied, optimum geometry shapes in terms of hydrodynamic performance are reported.
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January 2005
Technical Papers
Two-Dimensional CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication
Fredrik Sahlin,
Fredrik Sahlin
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
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Sergei B. Glavatskih,
Sergei B. Glavatskih
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
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Torbjo¨rn Almqvist,
Torbjo¨rn Almqvist
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
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Roland Larsson
Roland Larsson
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
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Fredrik Sahlin
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
Sergei B. Glavatskih
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
Torbjo¨rn Almqvist
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
Roland Larsson
Lulea˚ University of Technology, Division of Machine Elements Lulea˚, SE-971 87, Sweden
Manuscript received November 19, 2003; revision received August 6, 2004. Review conducted by: L. San Andre´s.
J. Tribol. Jan 2005, 127(1): 96-102 (7 pages)
Published Online: February 7, 2005
Article history
Received:
November 19, 2003
Revised:
August 6, 2004
Online:
February 7, 2005
Citation
Sahlin , F., Glavatskih , S. B., Almqvist , T., and Larsson, R. (February 7, 2005). "Two-Dimensional CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication ." ASME. J. Tribol. January 2005; 127(1): 96–102. https://doi.org/10.1115/1.1828067
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