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TECHNICAL PAPERS

Two-Dimensional CFD-Analysis of Micro-Patterned Surfaces in Hydrodynamic Lubrication

[+] Author and Article Information
Fredrik Sahlin, Sergei B. Glavatskih, Torbjörn Almqvist, Roland Larsson

Luleå University of Technology, Division of Machine Elements Luleå, SE-971 87, Sweden

J. Tribol 127(1), 96-102 (Feb 07, 2005) (7 pages) doi:10.1115/1.1828067 History: Received November 19, 2003; Revised August 06, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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Figures

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The fluid domain of the cylindrical geometry. Included are the geometrical parameters and boundary conditions.
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The fluid domain of the the splined geometry. Included are the geometrical parameters and boundary conditions.
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Comparison between Navier–Stokes and Stokes solutions for pressure distribution on the upper smooth wall for the cylindrical geometry. w+=0.2 and d+=0.25 for both plots. The vertical dotted lines represent the grove edges.
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Fy+ on a 10-base logarithmic scale as a function of w+ for Navier–Stokes and Stokes solution respectively, d+=0.25
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Upper wall pressure distribution for the cylindrical geometry with w+=0.30. The vertical dotted lines represent the grove edges.
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Upper wall pressure distribution for the splined geometry used with d+=0.25 and w+=0.50. The vertical dotted lines represent the grove edges.
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Streamlines in the cylindrical geometry for different values of d+ are plotted where Re=40 and w+=0.20
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Streamlines in the cylindrical geometry for different values of Re are plotted where d+=0.25 and w+=0.15
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Streamlines in cylindrical geometry for different values of w+. Re=40 and d+=0.75 in all figures.
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Streamlines for Navier–Stokes solution left and Stokes solution right. The cylindrical geometry is used and Re=160 for all.
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Fy+ as a function of w+ for various values of Re for the cylindrical geometry (top) and the splined with xd+=0 (bottom)
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Fy+ for various values of xd+ for the splined geometry
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Fx+ as a function of d+ for the values of w+={*0.15,▹0.2,+0.25,□0.3,×0.35,⋄0.4,▿0.45,▵0.5}. Solid line represents Re=40 and dashed line Re=160.
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Fy+ as a function of d+ for Re=40 and the values of w+={*0.15,▹0.2,+0.25,□0.3,×0.35,⋄0.4,▿0.45,▵0.5}. The cylindrical geometry (top) and the splined (bottom).
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Fy+ as a function of d+ for Re=160 and the values of w+={*0.15,▹0.2,+0.25,□0.3,×0.35,⋄0.4,▿0.45,▵0.5}. The cylindrical geometry (top) and the splined (bottom).

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