0
RESEARCH PAPERS

Lubricating Properties of Water in Oil Emulsions

[+] Author and Article Information
James J. Benner, Farshid Sadeghi

 Purdue University, West Lafayette, IN 47907

Michael R. Hoeprich, Mark C. Frank

 Timken Research, Canton, OH 44706

J. Tribol 128(2), 296-311 (Sep 22, 2005) (16 pages) doi:10.1115/1.2164464 History: Received December 15, 2004; Revised September 22, 2005

In this study the effect of water as a contaminant in lubricated contacts was analytically and experimentally investigated. A steel ball on glass disc apparatus was used to measure lubricant film thickness of pure oil and water in oil emulsions under various operating conditions. A steel ball on steel disc rig was used to measure friction as a function of various loads, slide to roll ratios and water in oil emulsions. A finite difference numerical model was developed using the continuum theory of mixtures and results were corroborated with the experimental measurements. Numerical results are in excellent agreement with the experimental results and indicate that water will flow around the contact. The experimental and analytical results suggest that for heavily loaded contacts water-in-oil emulsions perform essentially the same as pure oils.

Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Flowchart of computational scheme

Grahic Jump Location
Figure 2

Optical EHL test rig for the measurement film thickness

Grahic Jump Location
Figure 3

Color fringes for thin films of oil with refractive index of 1.48

Grahic Jump Location
Figure 4

Experimental results collected for the 1m∕s tests (U=2.918×10−11) for a 0.38GPa load, a 0.54GPa load, and a 0.70GPa load under pure rolling condition

Grahic Jump Location
Figure 5

Experimental results collected for the 2m∕s tests (U=5.837×10−11) for a 0.38GPa load, a 0.54GPa load, and a 0.70GPa load under pure rolling condition

Grahic Jump Location
Figure 9

Traction curve for Esso H46 oil at 1.4GPa hertzian pressure (Ue=9.50m∕s, w=117N)

Grahic Jump Location
Figure 10

Traction curve for Esso H46 Oil at 1.8GPa hertzian pressure (Ue=10.24m∕s, w=248N)

Grahic Jump Location
Figure 11

Contour plot of contact area for elastohydrodynamic lubrication (nm) with operating conditions of 1m∕s, 0.70GPa, and 90% oil under pure rolling condition

Grahic Jump Location
Figure 12

Comparison of experimental and numerical minimum film thickness measured across the rolling direction under pure rolling condition

Grahic Jump Location
Figure 14

Comparison of experimental and analytical results (W=5.988×10−7(0.38GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=0.80) under pure rolling condition

Grahic Jump Location
Figure 15

Comparison of experimental and analytical results (W=5.988×10−7(0.38GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=0.90) under pure rolling condition

Grahic Jump Location
Figure 16

Comparison of experimental and analytical results (W=5.988×10−7(0.38GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=1.0) under pure rolling condition

Grahic Jump Location
Figure 17

Comparison of experimental and analytical results (W=3.391×10−6(0.70GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=0.70) under pure rolling condition

Grahic Jump Location
Figure 18

Comparison of experimental and analytical results (W=3.391×10−6(0.70GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=1.0) under pure rolling condition

Grahic Jump Location
Figure 20

Comparison of experimental and analytical results (W=6.165×10−7(0.38GPa), U=1.167×10−10(4m∕s), G=2400, ϕ0=0.70) under pure rolling condition

Grahic Jump Location
Figure 21

Variation of oil volume fraction ϕ(W=1.695×10−6(0.54GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=0.70)

Grahic Jump Location
Figure 22

Variation of oil volume fraction ϕ(W=1.695×10−6(0.54GPa), U=5.837×10−11(2m∕s), G=2400, ϕ0=0.80)

Grahic Jump Location
Figure 19

Comparison of experimental and analytical results (W=6.165×10−7(0.38GPa), U=1.167×10−10(4m∕s), G=2400, ϕ0=1.0) under pure rolling condition

Grahic Jump Location
Figure 13

Comparison of experimental and analytical results (W=5.988×10−7(0.38GPa), U=2.918×10−11(1m∕s), G=2400, ϕ0=0.70) under pure rolling condition

Grahic Jump Location
Figure 8

Traction curve for Esso H46 oil at 1.0GPa hertzian pressure (Ue=8.58m∕s, w=43N)

Grahic Jump Location
Figure 7

Experimental results collected for the 4m∕s tests (U=1.167×10−10) for a 0.38GPa load, a 0.54GPa load, and a 0.70GPa load under pure rolling condition

Grahic Jump Location
Figure 6

Experimental results collected for the 3m∕s tests (U=8.755×10−11) for a 0.38GPa load, a 0.54GPa load, and a 0.70GPa load under pure rolling condition

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In