Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
권호 표지

NUMERICAL INVESTIGATION ON HYDRODYNAMIC LUBRICATION CHARACTERISTICS OF MICRO DIMPLE TEXTURED SURFACES

미세 딤플 가공 표면의 수력학적 윤활특성에 대한 수치해석

  • 홍사훈 (중앙대학교 대학원 기계공학과) ;
  • 이재응 (중앙대학교 기계공학부) ;
  • 조민행 (중앙대학교 기계공학부) ;
  • 이성혁 (중앙대학교 기계공학부)
  • Published : 2009.12.31
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Abstract

This study deals with the numerical investigation on two-dimensional lubrication characteristics of micro-dimple shapes fabricated on solid surfaces by using the commercial CFD code (Fluent V.6.3) to examine the influence of micro dimple depth and width on the reduction in friction under the sliding plate condition. In addition, single and multiple dimple arrays are simulated, all for a fixed area fraction of dimple on the surface. As a result, it is found that the existence of micro-dimpled surface makes it possible to substantially reduce the friction forces exerted on the surfaces, and such an optimum dimple depth would be present because the dimple depth larger than the optimum value did no longer affect the reduction in shear stresses, indicating that the reduction of friction is likely to be associated with inner flows of lubricant inside dimples. Moreover, it is observed that at the fixed area fraction, the friction reduction increases with the increase of dimple diameter.

Keywords

References

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