2D CFD-analysis of micro-patterned surfaces in hydrodynamic lubrication

Godkänd; 2004; Bibliografisk uppgift: Paper no 64009; 20070918 (ysko);ISBN:791841812
QC 20120227
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.

Glavatskih, SergeiLuleå University of Technology, Division of Machine Elements(Swepub:kth)u11deqr6 (author)
Almqvist, Torbjörn (author)
Larsson, RolandLuleå tekniska universitet,Maskinelement(Swepub:ltu)rola (author)
Luleå University of Technology, Division of Machine ElementsMaskinelement (creator_code:org_t)

In:Proceedings of the ASME/STLE international joint tribology conference 2004New York, s. 1637-1645, s. 1637-1645
In:Proceedings of the ASME/STLE international joint tribology conferenceNew York, s. 1637-1645, s. 1637-16450791841812

By the author/editor: Sahlin, Fredrik; Glavatskih, Serg ...; Almqvist, Torbjö ...; Larsson, Roland

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Tribology

By the university: Luleå University of Technology; Royal Institute of Technology

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