The present work deals with the flow characteristics induced by a two-dimensional roughness pattern. The roughness pattern consists of identical and equally spaced rectangles with characteristic lengths at least one order of magnitude larger than the clearance of the thin film. Periodic boundary conditions enable the analysis of a single groove and the complete Navier-Stokes analysis is carried on for turbulent Reynolds numbers. The analysis is performed for shear driven flows (Couette), pressure driven flows (Poiseuille) and combined Couette-Poiseuille flows. First, the presence of inertial forces generated by the groove is underlined by the momentum balance performed for the computational cell. The peculiar effect of the groove is also depicted by the rotor and the stator shear stresses variations. Finally, it is shown that despite the presence of inertial forces, cell-averaged rotor and stator shear stresses obtained for pure Couette or Poiseuille flows can be added or subtracted for approximately obtaining the characteristics of combined shear and pressure driven flows.
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ASME/STLE 2004 International Joint Tribology Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4181-2
PROCEEDINGS PAPER
Navier-Stokes Analysis of Two-Dimensional Roughness Pattern Under Turbulent Flow Regime
Fre´de´ric Billy,
Fre´de´ric Billy
Universite´ de Poitiers, Futuroscope Chasseneuil Cedex, France
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Mihai¨ Arghir,
Mihai¨ Arghir
Universite´ de Poitiers, Futuroscope Chasseneuil Cedex, France
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Ge´rard Pineau
Ge´rard Pineau
Universite´ de Poitiers, Futuroscope Chasseneuil Cedex, France
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Fre´de´ric Billy
Universite´ de Poitiers, Futuroscope Chasseneuil Cedex, France
Mihai¨ Arghir
Universite´ de Poitiers, Futuroscope Chasseneuil Cedex, France
Ge´rard Pineau
Universite´ de Poitiers, Futuroscope Chasseneuil Cedex, France
Paper No:
TRIB2004-64133, pp. 559-568; 10 pages
Published Online:
December 22, 2008
Citation
Billy, F, Arghir, M, & Pineau, G. "Navier-Stokes Analysis of Two-Dimensional Roughness Pattern Under Turbulent Flow Regime." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 559-568. ASME. https://doi.org/10.1115/TRIB2004-64133
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