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TECHNICAL PAPERS

An Average Lubrication Equation for Thin Film Grain Flow With Surface Roughness Effects

[+] Author and Article Information
Hung-Jung Tsai, Yeau-Ren Jeng

Department of Mechanical Engineering, National Chung Cheng University, Chia-Yi, Taiwan

J. Tribol 124(4), 736-742 (Sep 24, 2002) (7 pages) doi:10.1115/1.1484113 History: Received September 10, 2001; Revised April 09, 2002; Online September 24, 2002
Copyright © 2002 by ASME
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References

Figures

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Geometry of grain flow film between two rough surfaces
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Schematic of representative asperity and coordinates
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Grain flow functions Ψ(HP) as function of film particle ratio (HP)
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Grain size coefficients f(HP) and g(HP) as functions of film particle ratio (HP)
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(a) Variation of pressure flow factors (Φ̄xxP) with film thickness ratio (HS) for various film particle ratios (HP) with surfaces (γ12=9,σ12); and (b) Variation of cross pressure flow factors (Φ̄xyP) with film thickness ratio (HS) for various film particle ratios (HP) with surfaces (γ12=9,σ12).
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(a) Variation of pressure flow factors (Φ̄xxP) with film thickness ratio (HS) for various Peklenik numbers (γ) and film particle ratios (HP) with surfaces (θ12=0 deg,σ1=2σ2); and (b) Variation of cross pressure flow factors (Φ̄xyP) with film thickness ratio (HS) for various Peklenik numbers (γ) and film particle ratios (HP) with surfaces (θ12=45 deg,σ1=2σ2).
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(a) Variation of pressure flow factors (Φ̄xxP) with roughness orientation angles (θ) for various film particle ratios (HP) with surfaces (γ12=9,HS=3,σ1=2σ2); (b) Variation of cross pressure flow factors (Φ̄xyP) with roughness orientation angles (θ) for various film particle ratios (HP) with surfaces (γ12=9,HS=3,σ1=2σ2); and (c) Variation of shear flow factors (Φ̄xxS) with roughness orientation angles (θ) for various film particle ratios (HP) with surfaces (γ12=9,HS=3,σ1=2σ2).
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(a) Variation of pressure flow factors (Φ̄xxP) with film particle ratio (HP) for various roughness orientation angles (θ) with surfaces (γ12=9,HS=3,σ1=2σ2); and (b) Variation of cross pressure flow factors (Φ̄xyP) with film particle ratio (HP) for various roughness orientation angles (θ) with surfaces (γ12=9,HS=3,σ1=2σ2).

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