The study deals with the development of a thermohydrodynamic (THD) computational procedure for evaluating the pressure, temperature, and velocity distributions in fluid films with a very rough geometry. A parametric investigation is performed to predict the bearing behaviors in the lubricating film with the absorbed layers and their interfaces as determined by rough surfaces with Gaussian distribution. The layers are expressed as functions of the standard deviations of each surface to characterize flow patterns between both rough surfaces. Velocity variations and heat generation are assumed to occur in the central (shear) zone with the same bearing length and width. The coupled effect of the surface roughness and shear zone dependency on the hydrodynamic pressure and temperature has been found in the noncontact mode. The procedure confirms the numerically determined relationship between the pressure and film gap, provided that its roughness magnitude is smaller than the fluid film thickness.
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April 2005
Article
Thermohydrodynamic Analysis of Surface Roughness in the Flow Field
Joon Hyun Kim,
Joon Hyun Kim
School of Mechanical and Automotive Engineering, Kookmin University, 861-1 Chongnung-dong, Songbuk-gu, Seoul 136-702 Korea
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Joo-Hyun Kim
Joo-Hyun Kim
School of Mechanical and Automotive Engineering, Kookmin University, 861-1 Chongnung-dong, Songbuk-gu, Seoul 136-702 Korea
Search for other works by this author on:
Joon Hyun Kim
School of Mechanical and Automotive Engineering, Kookmin University, 861-1 Chongnung-dong, Songbuk-gu, Seoul 136-702 Korea
Joo-Hyun Kim
School of Mechanical and Automotive Engineering, Kookmin University, 861-1 Chongnung-dong, Songbuk-gu, Seoul 136-702 Korea
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received December 18, 2003; revision received August 30, 2004. Review conducted by: B. Bou-Said.
J. Tribol. Apr 2005, 127(2): 293-301 (9 pages)
Published Online: April 7, 2005
Article history
Received:
December 18, 2003
Revised:
August 30, 2004
Online:
April 7, 2005
Citation
Kim , J. H., and Kim, J. (April 7, 2005). "Thermohydrodynamic Analysis of Surface Roughness in the Flow Field ." ASME. J. Tribol. April 2005; 127(2): 293–301. https://doi.org/10.1115/1.1828072
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