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Two-Dimensional CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication
LuleƄ University of Technology, Division of Machine Elements.
2005 (English)In: Journal of tribology, ISSN 0742-4787, E-ISSN 1528-8897, Vol. 127, no 1, 96-102 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2005. Vol. 127, no 1, 96-102 p.
Keyword [en]
lubrication, hydrodynamics, computational fluid dynamics
National Category
Tribology
Identifiers
URN: urn:nbn:se:kth:diva-81289DOI: 10.1115/1.1828067ISI: 000227266900012OAI: oai:DiVA.org:kth-81289DiVA: diva2:497278
Note
QC 20120227Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2017-12-07Bibliographically approved

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Glavatskih, Sergei
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