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TECHNICAL PAPERS

Thermohydrodynamic Lubrication Analysis Incorporating Bingham Rheological Model

[+] Author and Article Information
J. H. Kim, A. A. Seireg

Mechanical Engineering Department, University of Florida-Gainesville, Gainesville, FL 32611

J. Tribol 122(1), 137-146 (Dec 22, 1998) (10 pages) doi:10.1115/1.555336 History: Received August 31, 1998; Revised December 22, 1998
Copyright © 2000 by ASME
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References

Figures

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Journal bearing pressure speed characteristics, D=80.112 mm,L=50.8 mm,C=0.3404 mm, SAE 10, Tin=53.3°C,ε=0.9,N=1050 rpm:=20,N=2100 rpm:=15, ○ Present study, □ Isoviscous theory, ▴ Calculated with empirical shear zone (Ref. 16), ▾ Experimental
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Shear zone ratio along film flow direction, D=80.112 mm,L=50.8 mm,C=0.3404 mm,ε=0.9,Tln=53.3°C, SAE 10, Time=0.5 s,N=2100 rpm,τ̄0=15, —— Calculated shear zone, ⋯ Empirical shear zone (Ref. 16)
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Illustration of the multi-layer lubrication film
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The normalized computational domain
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Program flow chart of THD analysis based on the Rheological behavior of the film
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Pressure distribution for various bearing running speed along the centerline of the journal bearing in the direction of sliding motion, D=80.112 mm,L=50.8 mm,C=0.3404 mm,ε=0.9, SAE 10, Tln=53.3°C, —▴— Calculated 2100 rpm τ0=15, —□— Calculated 1050 rpm τ0=20, —○— Experimental
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Pressure distribution for various shear yield parameters along the centerline of the journal bearing in the direction of sliding motion, D=80.112 mm,L=50.8 mm,C=0.3404 mm,ε=0.6, SAE 30, Tln=41.7°C, —○— Calculated with τ0=7,rpm=2000, —▵— Calculated with τ0=8,rpm=1000, ▴ Experimental, rpm=2000, —▴— Calculated with empirical shear zone, rpm=2000 (Ref. 16)
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Journal bearing pressure-speed characteristics D=80.112 mm,L=50.8 mm,C=0.3404 mm, SAE 30, Tln=41.7°C,ε=0.6,N=1000 rpm:τ0=8,N=2000 rpm:τ0=7, ○ Present study, □ Isoviscous theory, ▴ Empirical shear zone (Wang and Seireg), ▿ Experimental
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Shear zone ratio along film flow direction, D=80.112 mm,L=50.8 mm,C=0.3404 mm,ε=0.6,Tln=41.7°C,N=2000 rpm, SAE 30, τ̄0=7, —— Calculated shear zone, ⋯ Empirical shear zone (Ref. 16)
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Pressure distribution along the centerline of the journal bearing in the direction of sliding, D=80.112 mm,L=50.8 mm,C=0.3404 mm,ε=0.87,N=2400 rpm, SAE 50, Tln=71.1°C,τ0=8, —•— Calculated, —□— Experimental
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Pressure distribution along the centerline of the slider bearing in the direction of sliding, SAE 10, hmin=0.1016 mm,hmax=0.2032 mm,Tln=37.8°C,U=12.192 m/sec,B=L=76.2 mm, —▿— Calculated with τ̄0=8.0, —○— Calculated with τ̄0=10, —▴— Experimental
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Slider bearing pressure speed characteristics, B=L=76.2 mm,hmin=0.1016 mm,hmax=0.2032 mm, SAE 10, Tln=37.8°C,τ̄0=8.0, • Empirical shear zone (Ref. 16), ▪ Present study, ▴ Isoviscous theory
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Shear zone ratio along the film flow direction, B=L=76.2 mm,hmin=0.1016 mm,hmax=0.2032 mm,Tln=37.8°C,Time=0.2 s,U=12.192 m/s, SAE 10, τ0=8, —— Calculated shear zone, ⋯ Empirical shear zone (Ref. 16)
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Shear zone ratio along film flow direction, B=L=76.2 mm,hmin=0.1016 mm,hmax=0.2032 mm,Tln=37.8°C,Time=0.2 s,U=6.096 m/s, SAE 10, τ0=8, —— Calculated shear zone, ⋯ Empirical shear zone (Ref. 16)
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Velocity profile in the shear zone, hs/h along the mid-plane of the slider bearing in the direction of motion B=L=76.2 mm,hmin=0.1016 mm,hmax=0.2032 mm,U=12.192 m/sec, SAE 10, τ̄0=8.0,Tln=37.8°C
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Dimensionless film temperature distribution along the central line of the slider bearing in the direction of flow, B=L=76.2 mm,hmin=0.1016 mm,hmax=0.2032 mm, SAE 10, Tln=37.8°C,τ̄0=8.0,U=12.192 m/s
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Shear yield stress versus maximum pressure for the considered cases
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Dimensionless film temperature distribution at the journal bearing mid plane in the sliding direction, D=80.112 mm,L=50.8 mm,C=0.3404 mm,ε=0.9, SAE 10 Tln=53.3°C,Time=0.5 s,τ̄0=15,N=2100 rpm

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