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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ASME/STLE 2004 International Joint Tribology Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4181-2
PROCEEDINGS PAPER
2D CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication Available to Purchase
Fredrik Sahlin,
Fredrik Sahlin
Lulea˚ University of Technology, Lulea˚, Sweden
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Sergei B. Glavatskih,
Sergei B. Glavatskih
Lulea˚ University of Technology, Lulea˚, Sweden
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Torbjo¨rn Almqvist,
Torbjo¨rn Almqvist
Lulea˚ University of Technology, Lulea˚, Sweden
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Roland Larsson
Roland Larsson
Lulea˚ University of Technology, Lulea˚, Sweden
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Fredrik Sahlin
Lulea˚ University of Technology, Lulea˚, Sweden
Sergei B. Glavatskih
Lulea˚ University of Technology, Lulea˚, Sweden
Torbjo¨rn Almqvist
Lulea˚ University of Technology, Lulea˚, Sweden
Roland Larsson
Lulea˚ University of Technology, Lulea˚, Sweden
Paper No:
TRIB2004-64009, pp. 1657-1665; 9 pages
Published Online:
December 22, 2008
Citation
Sahlin, F, Glavatskih, SB, Almqvist, T, & Larsson, R. "2D CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 1657-1665. ASME. https://doi.org/10.1115/TRIB2004-64009
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